outdoor unit · 2019-02-06 · refrigerant piping length (one way, 4 unit total) calculation : xg =...

HFCutilized

R410ASERVICE MANUALNo. OBH723

REVISED EDITION-B

OUTDOOR UNIT

NOTE: RoHS compliant products have <G> mark on the spec name plate.

PARTS CATALOG (OBB723)

Models

MXZ-3E54VA - E1 , ET1





MXZ-2E53VAHZ - E1

MXZ-4E83VAHZ - E1

CONTENTS

1. TECHNICAL CHANGES ··································· 32. PART NAMES AND FUNCTIONS ····················· 43. SPECIFICATION ················································ 54. NOISE CRITERIA CURVES ···························· 125. OUTLINES AND DIMENSIONS ······················ 146. WIRING DIAGRAM ·········································· 207. REFRIGERANT SYSTEM DIAGRAM ············· 288. PERFORMANCE CURVES ····························· 369. ACTUATOR CONTROL ··································· 65

10. SERVICE FUNCTIONS ···································· 6611. TROUBLESHOOTING ····································· 6912. DISASSEMBLY INSTRUCTIONS ···················· 89

INDOOR UNITS COMBINATION SHEETS

Indoor unit service manualMSZ-EF•VE Series (OBH589)MSZ-SF•VA Series (OBH555)MSZ-SF•VE Series (OBH600)MSZ-FD•VA Series (OBH488)MSZ-FH•VE Series (OBH623)MSZ-GA•VA Series (OB378)MSZ-GE•VA Series (OBH515)MSZ-GF•VE Series (OBH634)MFZ-KA•VA Series (OB409)MFZ-KJ•VE Series (OBH666)MLZ-KA•VA Series (OBH483)SLZ-KA•VA Series (OC320)SEZ-KD•VA Series (HWE07110)PLA-RP•BA Series (OCH412)PCA-RP•KA Series (OCH454)PEAD-RP•JA Series (HWE08130)

Please void OBH723 REVISED EDITION-A.

Revision B:• MXZ-3E54VA- E1 , ET1 , MXZ-3E68VA- E1 ,

ET1 and MXZ-4E72VA- E1 , ET1 have been added.

MXZ-4E83VAMXZ-5E102VAMXZ-2E53VAHZ

2

<Preparation before the repair service> Prepare the proper tools. Prepare the proper protectors. Provide adequate ventilation. After stopping the operation of the air conditioner, turn off the power-supply breaker and remove the power plug. Discharge the capacitor before the work involving the electric parts.

<Precautions during the repair service> Do not perform the work involving the electric parts with wet hands. Do not pour water into the electric parts. Do not touch the refrigerant. Do not touch the hot or cold areas in the refrigeration cycle. When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to

touch the live parts.

Use the specifi ed refrigerant onlyNever use any refrigerant other than that specified.Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.Correct refrigerant is specified in the manuals and on the spec labels provided with our products.We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions.

Revision A:• MXZ-2E53VAHZ- E1 and MXZ-4E83VAHZ- E1 have been added.• Values of air flow and fan speed for MXZ-5E102VA- E1 , ET1 have been modified.

Revision B:• MXZ-3E54VA- E1 , ET1 , MXZ-3E68VA- E1 , ET1 , and MXZ-4E72VA- E1 , ET1 have been added.

OBH723B

3

TECHNICAL CHANGES1



1. New model

MXZ-2E53VAHZ - E1

1. New model

MXZ-4E83VAHZ - E1

1. New model




1. New model

OBH723B

4

PART NAMES AND FUNCTIONS2

MXZ-4E83VAMXZ-5E102VAMXZ-2E53VAHZ

Air outlet

Drain outlet

Air inlet(Back and side)

Air outlet

Drain outlet


MXZ-4E83VAHZ

Air outlet

Drain outlet


MXZ-3E54VAMXZ-3E68VAMXZ-4E72VA

ACCESSORIES

ModelMXZ-3E54VAMXZ-3E68VAMXZ-4E72VA

MXZ-4E83VAMXZ-5E102VAMXZ-2E53VAHZMXZ-4E83VAHZ

Drain socket 1 1Drain cap 2 5

OBH723B

5

SPECIFICATION3

Outdoor model MXZ-3E54VA

Outdoor unit power supply Single phase230 V, 50 Hz

Sys

tem

Indoor units number 2 to 3Piping total length m Max. 50Connecting pipe length m Max. 25Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.Function Cooling HeatingCapacity Rated frequency (Min.-Max.) 2 kW 5.4 (2.9 - 6.8) 7.0 (2.6 - 9.0)Breaker capacity A 25

Ele

ctric

al d

ata

Power input (Total) 1, 2 W 1,350 1,590

Running current (Total) 1, 2 A 5.9 7.0

Power factor (Total) 1, 2 % 99Starting current (Total) 1, 2 A 7.0

Coeffi cient of performance (C.O.P) (Total) 1, 2 4.00 4.40

Com

pres

sor Model SNB130FGBH1T

Output W 1,400Current 1, 2 A 5.72 6.62Refrigeration oil (Model) L 0.7 (NEO22)

Fan

mot

or Model SIC-71FW-F764-2Current 1, 2 A 0.2Dimensions W x H x D mm 840 x 710 x 330Weight kg 58

Spe

cial

rem

arks

Air fl ow (Rated) m3 /h 2,334 2,376Sound level (Rated) dB(A) 50 53Fan speed (Rated) rpm 650 660Refrigerant fi lling capacity (R410A) kg 2.7

1 Measured under rated operating frequency.2 When connected with indoor units below.

MSZ-EF18VE + MSZ-EF18VE + MSZ-EF18VENOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °CHEATING INDOOR Dry-bulb temperature 20.0 °C OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C

OBH723B

6



Sys

tem


Ele

ctric

al d

ata

Power input (Total) 1, 2 W 2,190 2,380Running current (Total) 1, 2 A 9.6 10.5Power factor (Total) 1, 2 % 99Starting current (Total) 1, 2 A 10.5


Com

pres

sor Model SNB172FEGH1T


Fan

mot


Spe

cial

rem

arks



MSZ-EF18VE + MSZ-EF25VE + MSZ-EF25VENOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °CHEATING INDOOR Dry-bulb temperature 20.0 °C OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C

OBH723B

7



Sys

tem


Ele

ctric

al d

ata



Com

pres

sor Model SNB172FEGH1T


Fan

mot


Spe

cial

rem

arks



MSZ-EF18VE + MSZ-EF18VE + MSZ-EF18VE + MSZ-EF18VENOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °CHEATING INDOOR Dry-bulb temperature 20.0 °C OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C

OBH723B

8



Sys

tem


Ele

ctric

al d

ata



Com

pres

sor Model SNB220FAGMC

Output W 2,200Current 1, 2 A 10.1 8.1Refrigeration oil (Model) L 0.7 (FV50S)

Fan

mot

or Model SIC-81FW-D888-9Current 1, 2 A 0.3Dimensions W x H x D mm 950 x 796 x 330Weight kg 62

Spe

cial

rem

arks


1 Measured under rated operating frequency.2 When connected with below indoor units.

MSZ-EF18VE + MSZ-EF18VE + MSZ-EF22VE + MSZ-EF25VENOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)COOLING INDOOR Dry-bulb temperature 27.0°C Wet-bulb temperature 19.0°C OUTDOOR Dry-bulb temperature 35.0°C Wet-bulb temperature 24.0°CHEATING INDOOR Dry-bulb temperature 20.0°C OUTDOOR Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C

OBH723B

9



Sys

tem


Ele

ctric

al d

ata



Com

pres



Fan

mot


Spe

cial

rem

arks


1 Measured under rated operating frequency.2 When connected with below indoor units.

MSZ-EF18VE + MSZ-EF18VE + MSZ-EF22VE + MSZ-EF22VE + MSZ-EF22VENOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)COOLING INDOOR Dry-bulb temperature 27.0°C Wet-bulb temperature 19.0°C OUTDOOR Dry-bulb temperature 35.0°C Wet-bulb temperature 24.0°CHEATING INDOOR Dry-bulb temperature 20.0°C OUTDOOR Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C

OBH723B

10

Outdoor model MXZ-2E53VAHZ


Sys

tem

Indoor units number 2Piping total length m Max. 30Connecting pipe length m Max. 20Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.Function Cooling HeatingCapacity Rated frequency (Min.-Max.) 2 kW 5.3 (1.1 - 6.0) 6.4 (1.0 - 7.0)Breaker capacity A 16/25 3

Ele

ctric

al d

ata



Com

pres



Fan

mot


Spe

cial

rem

arks


1 Measured under rated operating frequency.2 When connected with below indoor units.3 When the amount of current exceeds the allowed value.

MSZ-EF18VE + MSZ-EF35VENOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)COOLING INDOOR Dry-bulb temperature 27.0°C Wet-bulb temperature 19.0°C OUTDOOR Dry-bulb temperature 35.0°C Wet-bulb temperature 24.0°CHEATING INDOOR Dry-bulb temperature 20.0°C OUTDOOR Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C

OBH723B

11

Outdoor model MXZ-4E83VAHZ


Sys

tem

Indoor units number 2 to 4Piping total length m Max. 70Connecting pipe length m Max. 25Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.Function Cooling HeatingCapacity Rated frequency (Min.-Max.) 2 kW 8.3 ( 3.7 - 9.2 ) 9.0 ( 3.4 - 11.6 )Breaker capacity A 25/30 3

Ele

ctric

al d

ata



Com

pres

sor Model MNB33FBTMC-L


Fan

mot

or Model SIC-81FW-D888-9Current 1, 2 A 0.3Dimensions W x H x D mm 950 x 1,048 x 330Weight kg 87

Spe

cial

rem

arks


1 Measured under rated operating frequency.2 When connected with indoor units below.3 When the amount of current exceeds the allowed value.

MSZ-EF18VE + MSZ-EF18VE + MSZ-EF22VE + MSZ-EF25VE NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °CHEATING INDOOR Dry-bulb temperature 20.0 °C OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C

OBH723B

12

NOISE CRITERIA CURVES4

90

80

70

60

50

40

30

20

1063 125 250 500 1000 2000 4000 8000

APPROXIMATETHRESHOLD OFHEARING FORCONTINUOUSNOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCT

AVE

BAND

SO

UND

PRES

SURE

LEV

EL, d

B re

0.0

002

MIC

RO B

AR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTIONFAN SPEED

HeatingHigh

49

SPL(dB(A))

51

LINE

OUTDOOR UNIT

MICROPHONE1m Test conditions

Cooling :Dry-bulb temperature 35.0°C Wet-bulb temperature 24.0°C Heating :Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C

MXZ-4E83VA

90

80

70

60

50

40

30

20

1063 125 250 500 1000 2000 4000 8000


NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCT

AVE

BAND

SO

UND

PRES

SURE

LEV

EL, d

B re

0.0

002

MIC

RO B

AR


CoolingHigh

FUNCTIONFAN SPEED

HeatingHigh

50

SPL(dB(A))

53

LINE

90

80

70

60

50

40

30

20

1063 125 250 500 1000 2000 4000 8000


NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCT

AVE

BAND

SO

UND

PRES

SURE

LEV

EL, d

B re

0.0

002

MIC

RO B

AR


CoolingHigh

FUNCTIONFAN SPEED

HeatingHigh

50

SPL(dB(A))

53

LINE

90

80

70

60

50

40

30

20

1063 125 250 500 1000 2000 4000 8000


NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCT

AVE

BAND

SO

UND

PRES

SURE

LEV

EL, d

B re

0.0

002

MIC

RO B

AR


CoolingHigh

FUNCTIONFAN SPEED

HeatingHigh

50

SPL(dB(A))

53

LINE

MXZ-3E54VA MXZ-3E68VA

MXZ-4E72VA

OBH723B

13

90

80

70

60

50

40

30

20

1063 125 250 500 1000 2000 4000 8000


NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCT

AVE

BAND

SO

UND

PRES

SURE

LEV

EL, d

B re

0.0

002

MIC

RO B

AR


CoolingHigh

FUNCTIONFAN SPEED

HeatingHigh

52

SPL(dB(A))

56

LINE

MXZ-5E102VA

MXZ-4E83VAHZ

MXZ-2E53VAHZ

90

80

70

60

50

40

30

20

1063 125 250 500 1000 2000 4000 8000


NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OC

TAVE

BA

ND

SO

UN

D P

RES

SUR

E LE

VEL,

dB

re 0

.000

2 M

ICR

O B

AR


CoolingHigh

FUNCTIONFAN SPEED

HeatingHigh

53

SPL(dB(A))

57

LINE

90

80

70

60

50

40

30

20

1063 125 250 500 1000 2000 4000 8000


NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCT

AVE

BAND

SO

UND

PRES

SURE

LEV

EL, d

B re

0.0

002

MIC

RO B

AR


CoolingHigh

FUNCTIONFAN SPEED

HeatingHigh

45

SPL(dB(A))

47

LINE

OBH723B

14

OUTLINES AND DIMENSIONS5

1.Installation space

Note : Leave front and both sides free of obstruction.

Note : Leave rear, overhead and both sides free of obstruction.

500

or m

ore

100 or more

Note : Leave front and overhead free of obstruction.

100 or more 350 or more

200

or m

ore

500

or m

ore

2.Service space

100

or m

ore

500

or m

ore

350 or more350 or more

100 or moreService space

MXZ-3E54VA MXZ-3E68VAUnit: mm

OBH723B

15

1.Installation space

Note : Leave front and both sides free of obstruction.

Note : Leave rear, overhead and both sides free of obstruction.

500

or m

ore

100 or more

Note : Leave front and overhead free of obstruction.

100 or more 350 or more

200

or m

ore

500

or m

ore

2.Service space10

0 or

mor

e

500

or m

ore

350 or more350 or more

100 or moreService space

MXZ-4E72VAUnit: mm

OBH723B

16

MXZ-4E83VAUnit: mm

Air in

Air in

Air in

Air out

OBH723B

17

MXZ-5E102VAUnit: mm

Air in

Air in

Air in

Air out

OBH723B

18

Unit: mmMXZ-2E53VAHZ

OBH723B

19

MXZ-4E83VAHZUnit: mm

OBH723B

20

MXZ-3E54VA - E1 MXZ-3E54VA - ET1


WIRING DIAGRAM6

t°21

S4

t°°t

°t

L

MS 3~

t°

RT6

4

M LEV

RLE

V C

LEV

ALE

V B

RT6

2R

T61

X71

4X

712

F711

TO IN

DO

OR

UN

IT N

o.C

TO IN

DO

OR

UN

IT N

o.A

TO IN

DO

OR

UN

IT N

o.B

TB2

TB3

TB4

12-2

4V

~230

V

~230

V

12-2

4V

~230

V

12-2

4V

RT6

8R

T65

MM

M

MS

3~M

F

T801

BLK W

HT

RE

DR

ED

WH

T

BLK

U

V

W

MC

CB

3C

B2

CB

1B

OA

RD

PO

WE

R P

.C.

OU

TDO

OR

OU

TDO

OR

CO

NTR

OL

P.C

. BO

AR

D

F1F2

TB1

BR

EA

KE

RC

IRC

UIT

PO

WE

R S

UP

PLY

~/N

230

V 5

0Hz

IC80

1

5

HPS

CN63

H1

3

16

CN

797

CN

714 1

2

CN

AC

CN

712 1

2

S1

S2

S3

S1

S2

S3

S1

S2

S3

15

CN

741

D1

IC40

1IC

402

21C

N17

1

18

CN

TH1

21C

NTH

2

55

5

CN

MC

15

51

17

1

CN

792

CN

791

CN

793

15

5

71

CN

F1C

N70

21

3C

ND

C

U V W

13

1C

N15

11

7C

ND

CC

NA

C2

CN

7012

112

CN

152

IC50

1IC

411

TAB

4TA

B6

TAB

5TA

B3

X52

C

3

5

CN

601

13

CN

611

1

TAB

1

TAB

2

31

CN

AC

1

3TB

E4

TBE

2TB

E1

PTC

1

PTC

2

X65

L N

(BLU

)B

LK

BLU

RE

D

BLK

BLU

WH

T

BLK

BLU

OR

N

BLK

BLK

BRN

BLK

BLK

(RE

D)

(WH

T)(B

LU)

BLKBLKBLKBLKBLK

BLKBLK

BLK BLU R

ED

BLU

BLK

BLK

BLK

BLK

BLK

BLU

GR

N/Y

LW

WH

T

OR

N

++

+

LEV

A~C,

RM

CM

FP

TC1,

2R

T61

RT6

2

X52

CX

65X

712

X71

4

21S

4

RE

LAY

RE

LAY

RE

LAY

RE

LAY

RE

VE

RS

ING

VA

LVE

SO

LEN

OID

CO

ILD

EFR

OS

T TH

ER

MIS

TOR

FIN

TE

MP

. TH

ER

MIS

TOR

AMBI

ENT

TEM

P. T

HERM

ISTO

RO

UTDO

OR

HEAT

EXC

HANG

ERTE

MPE

RATU

RE T

HERM

ISTO

RTR

AN

SFO

RM

ER

TER

MIN

AL

BLO

CK

RT6

4R

T65

RT6

8

T801

TB1~

4

FAN

MO

TOR

CO

MP

RE

SS

OR

EX

PA

NS

ION

VA

LVE

CO

IL

DISC

HARG

E TE

MP.

THE

RMIS

TOR

SM

OO

THIN

G C

AP

AC

ITO

RD

IOD

EFU

SE

(T6.

3AL2

50V

)FU

SE

(T6.

3AL2

50V

)FU

SE

(T3.

15A

L250

V)

HIG

H P

RE

SS

UR

E S

WIT

CH

CB

1~3

D1

F1 F2 F711

HP

S

CIR

CU

IT P

RO

TEC

TIO

N

NO

TES

:1.

Abo

ut th

e in

door

sid

e el

ectri

c w

iring

refe

r to

the

indo

or u

nit

ele

ctric

wiri

ng d

iagr

am fo

r s

ervi

cing

.2.

Use

cop

per c

ondu

ctor

s on

ly (

For f

ield

wiri

ng).

3.S

ymbo

ls b

elow

indi

cate

.

:T

erm

inal

blo

ck

:C

onne

ctor

SY

MB

OL

NA

ME

SY

MB

OL

SY

MB

OL

SY

MB

OL

NA

ME

NA

ME

NA

ME

SY

MB

OL

NA

ME

DIO

DE

BR

IDG

EPO

WER

FAC

TOR

CONT

ROLL

ERP

OW

ER

MO

DU

LEP

OW

ER

DE

VIC

ER

EA

CTO

RLE

D

IC40

1,40

2IC

411

IC50

1IC

801

LLE

D1~

3

LED

3

LED

2

LED

1

OBH723B

21


t°21

S4

t°°t

°t

L

MS 3~

RT6

4

M LEV

RLE

V C

LEV

ALE

V B

RT6

2R

T61

X71

4X

712

F711

TO IN

DO

OR

UN

IT N

o.C

TO IN

DO

OR

UN

IT N

o.A

TO IN

DO

OR

UN

IT N

o.B

TB2

TB3

TB4

12-2

4V

~230

V

~230

V

12-2

4V

~230

V

12-2

4V

RT6

8R

T65

MM

M

MS

3~M

F

T801

BLK W

HT

RE

DR

ED

WH

T

BLK

U

V

W

MC

CB

3C

B2

CB

1B

OA

RD

PO

WE

R P

.C.

OU

TDO

OR

OU

TDO

OR

CO

NTR

OL

P.C

. BO

AR

D

F1F2

TB1

BR

EA

KE

RC

IRC

UIT

PO

WE

R S

UP

PLY

~/N

230

V 5

0Hz

LEV

D

M

TO IN

DO

OR

UN

IT N

o.D

~230

V

12-2

4V

TB5

IC80

1

5

HPS

CN63

H1

3

16

CN

797

CN

714 1

2

CN

AC

CN

712 1

2

S1

S2

S3

S1

S2

S3

S1

S2

S3

15

CN

741

D1

IC40

1IC

402

21C

N17

1

18

CN

TH1

21C

NTH

2

55

5

CN

MC

15

51

17

1

CN

792

CN

791

CN

793

15

5

71

CN

F1C

N70

21

3C

ND

C

U V W

13

1C

N15

11

7C

ND

CC

NA

C2

CN

794

51

CN

7012

112

CN

152

IC50

1IC

411

TAB

4TA

B6

TAB

5TA

B3

X52

C

3

5

CN

601

13

CN

611

11

CN

621

5

TAB

1

TAB

2

31

CN

AC

1

3TB

E4

TBE

2TB

E1

PTC

1

PTC

2

X65

L N

5

S1

S2

S3

(BLU

)B

LK

BLU

RE

D

BLK

BLU

WH

T

BLK

BLU

OR

N

BLK

BLK

BRN

BLK

BLK

(RE

D)

(WH

T)(B

LU)

(YLW

)

BLKBLKBLKBLKBLK

BLKBLK

BLK BLU R

ED

BLU

BLK

BLK

BLK

BLK

BLK

BLU

GR

N/Y

LW

WH

T

OR

N

YLW

BLU

BLK

YLW

++

+

LEV

A~D,

RM

CM

FP

TC1,

2R

T61

RT6

2

X52

CX

65X

712

X71

4

21S

4

RE

LAY

RE

LAY

RE

LAY

RE

LAY

RE

VE

RS

ING

VA

LVE

SO

LEN

OID

CO

ILD

EFR

OS

T TH

ER

MIS

TOR

FIN

TE

MP

. TH

ER

MIS

TOR

AMBI

ENT

TEM

P. T

HERM

ISTO

RO

UTDO

OR

HEAT

EXC

HANG

ERTE

MPE

RATU

RE T

HERM

ISTO

RTR

AN

SFO

RM

ER

TER

MIN

AL

BLO

CK

RT6

4R

T65

RT6

8

T801

TB1~

5

FAN

MO

TOR

CO

MP

RE

SS

OR

EX

PA

NS

ION

VA

LVE

CO

IL

DISC

HARG

E TE

MP.

THE

RMIS

TOR

SM

OO

THIN

G C

AP

AC

ITO

RD

IOD

EFU

SE

(T6.

3AL2

50V

)FU

SE

(T6.

3AL2

50V

)FU

SE

(T3.

15A

L250

V)

HIG

H P

RE

SS

UR

E S

WIT

CH

CB

1~3

D1

F1 F2 F711

HP

S

CIR

CU

IT P

RO

TEC

TIO

N

NO

TES

:1.

Abo

ut th

e in

door

sid

e el

ectri

c w

iring

refe

r to

the

indo

or u

nit

ele

ctric

wiri

ng d

iagr

am fo

r s

ervi

cing

.2.

Use

cop

per c

ondu

ctor

s on

ly (

For f

ield

wiri

ng).

3.S

ymbo

ls b

elow

indi

cate

.

:T

erm

inal

blo

ck

:C

onne

ctor

SY

MB

OL

NA

ME

SY

MB

OL

SY

MB

OL

SY

MB

OL

NA

ME

NA

ME

NA

ME

SY

MB

OL

NA

ME

DIO

DE

BR

IDG

EPO

WER

FAC

TOR

CONT

ROLL

ERP

OW

ER

MO

DU

LEP

OW

ER

DE

VIC

ER

EA

CTO

RLE

D

IC40

1,40

2IC

411

IC50

1IC

801

LLE

D1~

3

LED

3

LED

2

LED

1

t°

OBH723B

22

MXZ-4E83VA - E1

OBH723B

23

MXZ-4E83VA - ET1

OBH723B

24

MXZ-5E102VA - E1

OBH723B

25

MXZ-5E102VA - ET1

OBH723B

26

MXZ-2E53VAHZ - E1

OBH723B

27

MXZ-4E83VAHZ - E1

OBH723B

28

REFRIGERANT SYSTEM DIAGRAM7

Strainer#100

Powerreceiver

LEV A

LEV B

LEV C

Oil separator

Compressor

Defrost thermistorRT61

Distributor

Muffler

4-way valve

LEV E

Indoor unitC

Indoor unitB

Indoor unitA

Indoor unitA

Indoor unitB

Indoor unitC

Capillary tube

Capillary tube

Capillary tube

Capillary tube

Capillary tube

Dischargetemperaturethermistor RT62

Strainer#100

Strainer#100

Strainer#100

R.V. coil OFF ON

Refrigerant flow in coolingRefrigerant flow in heating

Ambienttemperature thermistor RT65

Outdoor heatexchangertemperaturethermistorRT68

FAN-OUT

HE

X-O

UT

Strainer#100

Stop valve withservice port

Stop valve

High-pressure switch

UNIT: mm (inch)

UNIT: mmMXZ-3E54VA

MAX REFRIGERANT PIPING LENGTH

Outdoor unit union diameterFor

Indoor unit A Liquid 6.35(1/4)Gas 9.52(3/8)

Indoor unit B Liquid 6.35(1/4)Gas 9.52(3/8)

Indoor unit C Liquid 6.35(1/4)Gas 9.52(3/8)

a

b

c

Outdoorunit

Indoorunits

15 m

10 m

15 m

Max.Heightdifference

Piping length each indoor unit (a, b, c) 25 mTotal piping length (a+b+c) 50 mBending point for each unit 25Total bending point 50It is irrelevant which unit is higher.

Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the right table.

When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe.

For further information on Different-diameter pipe, refer to "PARTS CATALOG".

ADDITIONAL REFRIGERANT CHARGEOutdoor unit precharged

(g)

Refrigerant piping length (one way, 3 unit total)

40 m 45 m 50 m

2,700 0 100 200

Calculation : Xg = 20 g/m x (Refrigerant piping length (m) - 40)

WHEN CONNECTING TO MFZ-KJ SERIES INDOOR UNITMXZ-3E54VA - E1 / ET1

No. ofMFZ-KJ

indoor units

Refrigerant piping length (L) Maximum amount of refrigerant~ 40 m ~ 50 m

None Charge-less (2,700 g) (L-40) x 20 g/m 2,900 g1 unit 100 g additional charge (2,800 g) 100 g + (L-40) x 20 g/m 3,000 g2 units 200 g additional charge (2,900 g) 200 g + (L-40) x 20 g/m 3,100 g3 units 300 g additional charge (3,000 g) 300 g + (L-40) x 20 g/m 3,200 g

OBH723B

29

Strainer#100

Powerreceiver

LEV A

LEV B

LEV C

Oil separator

Compressor


Distributor

Muffler

4-way valve

LEV E

Indoor unitC

Indoor unitB

Indoor unitA

Indoor unitA

Indoor unitB

Indoor unitC

Capillary tube

Capillary tube

Capillary tube

Capillary tube

Capillary tube


Strainer#100

Strainer#100

Strainer#100

R.V. coil OFF ON




FAN-OUT

HE

X-O

UT

Strainer#100

Stop valve withservice port

Stop valve

High-pressure switch

UNIT: mmMXZ-3E68VA

MAX REFRIGERANT PIPING LENGTHa

b

c

Outdoorunit

Indoorunits

15 m

10 m

15 m


Piping length each indoor unit (a, b, c) 25 mTotal piping length (a+b+c) 60 mBending point for each unit 25Total bending point 60It is irrelevant which unit is higher.


(g)


40 m 50 m 60 m

2,700 0 200 400


UNIT: mm (inch)Outdoor unit union diameter

For








No. ofMFZ-KJ

indoor units


None Charge-less (2,700 g) (L-40) x 20 g/m 3,100 g1 unit 100 g additional charge (2,800 g) 100 g + (L-40) x 20 g/m 3,200 g2 units 200 g additional charge (2,900 g) 200 g + (L-40) x 20 g/m 3,300 g3 units 300 g additional charge (3,000 g) 300 g + (L-40) x 20 g/m 3,400 g

OBH723B

30

MXZ-4E72VA

Indoor unitD

Powerreceiver

LEV A

LEV B

LEV C

LEV D

Oil separator

Compressor

Muffler

4-way valve

LEV E

Indoor unitC

Indoor unitB

Indoor unitA

Indoor unitA

Indoor unitB

Indoor unitC

Indoor unitD

Capillary tube

Capillary tube


Strainer#100

Strainer#100

Strainer#100

Strainer#100

Strainer#100

R.V. coil OFF ON


Distributor

HE

X-O

UT



Capillary tube


FAN-OUT

Strainer#100

Stop valve with service port

Stop valve

High-pressureswitch

UNIT: mm

a

b

c

d

Outdoorunit

Indoorunits

15 m

10 m

15 m


UNIT: mm (inch)Outdoor unit union diameterFor




Indoor unit D Liquid 6.35(1/4)Gas 9.52(3/8)




MAX REFRIGERANT PIPING LENGTHPiping length each indoor unit (a, b, c, d) 25 mTotal piping length (a+b+c+d) 60 mBending point for each unit 25Total bending point 60It is irrelevant which unit is higher.


(g)


40 m 50 m 60 m

2,700 0 200 400



No. ofMFZ-KJ

indoor units


None Charge-less (2,700 g) (L-40) x 20 g/m 3,100 g1 unit 100 g additional charge (2,800 g) 100 g + (L-40) x 20 g/m 3,200 g2 units 200 g additional charge (2,900 g) 200 g + (L-40) x 20 g/m 3,300 g3 units 300 g additional charge (3,000 g) 300 g + (L-40) x 20 g/m 3,400 g4 units 400 g additional charge (3,100 g) 400 g + (L-40) x 20 g/m 3,500 g

OBH723B

31

a

b

c

d

Outdoorunit

Indoorunits

15 m

15 m

10 m




Outdoor unit precharged

(g) 40 m

300

25 m

02,990

55 m

600

70 m

900

R.V.coilOFF Refrigerant flow in heatingON Refrigerant flow in cooling

Charge pipe

Compressor

MufflerHigh pressure switch

Ø6.35

Ø6.35

Ø9.52

Ø12.7

Accumulator

Ø6.35 LEV A

Ø9.52

Strainer#100

Strainer#100

Strainer#100

Strainer#100

Union

Union Header(Gas)

Stop valve

Header (Evaporator)

Ø6.35

Ø9.52

Submuffler

DischargetemperaturethermistorRT62

Outdoorheat exchangertemperaturethermistorRT68

AmbienttemperaturethermistorRT65

DefrosttemperaturethermistorRT61

Capillary tubeØ4.0 x Ø2.8 x 100

Indoor unit A

Indoor unit D

Indoor unit C

Indoor unit B

4-way valveStop valve(with service port)

Indoor unit A

Indoor unit D

Indoor unit C

Indoor unit BLEV B

LEV C

LEV D

Outdoorheat exchanger

Capillary tube

Distributor

Strainer#100

Strainer#50

MXZ-4E83VA UNIT: mm

Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the tables below.

When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe. For further information on Different-diameter pipe, refer to "PARTS CATALOG".

UNIT: mm (inch)

Piping length each indoor unit (a, b, c, d) 25 m Total piping length (a+b+c+d) 70 m Bending point for each unit 25 Total bending point 70







It is irrelevant which unit is higher.ADDITIONAL REFRIGERANT CHARGE

OBH723B

32

a

b

c

d

Outdoorunit

Indoorunits

15 m

10 m

15 m



e



(g) 20 m

400

0 m

02,990

40 m

800

60 m

1,200

80 m

1,600


Compressor


Ø6.35

Ø6.35

Ø9.52

Ø12.7

Accumulator

Ø6.35 LEV A

Ø9.52

Strainer#100

Strainer#100

Strainer#100

Strainer#100

Union

Union Header(Gas)

Stop valve

Header (Evaporator)

Ø6.35

Ø9.52

Submuffler






Indoor unit A

Indoor unit D

Indoor unit C

Ø9.52Indoor unit E

Indoor unit B


Indoor unit A

Indoor unit D

Indoor unit C

Indoor unit BLEV B

LEV C

LEV D

Strainer#100Ø6.35

Indoor unit ELEV E


Capillary tube

Distributor

Strainer#100

Strainer#50

Charge pipe

MXZ-5E102VA UNIT: mm



UNIT: mm (inch)

Piping length each indoor unit (a, b, c, d,e) 25 m Total piping length (a+b+c+d+e) 80 m Bending point for each unit 25 Total bending point 80







Indoor unit E Liquid 6.35(1/4)Gas 9.52(3/8)


OBH723B

33



a

b

Outdoorunit

Indoorunits

15 m

10 m

15 m

Max.Height difference


(g) 25 m

100

20 m

02,000

30 m

200


Compressor


Ø6.35

Ø9.52

Ø9.52

Accumulator

Ø6.35 LEV AStrainer#100

Strainer#100

Strainer

Union

Union Header(Gas)

Stop valve

Header (Evaporator)Submuffler






Indoor unit A

Indoor unit B


Indoor unit A

Indoor unit BLEV B


Capillary tube

Distributor

Strainer#100

Strainer#50

Charge pipe

MXZ-2E53VAHZ UNIT: mm



UNIT: mm (inch)

Piping length each indoor unit (a, b) 20 m Total piping length (a+b) 30 m Bending point for each unit 20 Total bending point 30






OBH723B

34

MXZ-4E83VAHZ


Compressor

Oil separator

High pressure switch

Ø6.35

Ø6.35

Ø9.52

Ø12.7Indoor unit A

Accumulator

Ø6.35 LEV A

Ø9.52

2-way solenoid valve

Distributor

Strainer #100Union

Union Header(Gas)

Stop valve

Strainer

Strainer#50Strainer

#50

#100

Header(Evaporator)

Charge pipe

Capillary tube

Capillary tube

Ø2.5 x Ø0.6 x 1000

Ø4.0 x Ø3.0 x 200

Ø6.35







4-way valve

Stop valve(with service port)

Indoor unit B

Indoor unit CØ9.52

Indoor unit D

Indoor unit A

Indoor unit B

Indoor unit C

Indoor unit DStrainer #100

Strainer #100

Strainer #100 LEV B

LEV D

LEV C

Capillary tube




(g) 40 m

300

25 m

03,900

55 m

600

70 m

900

a

b

c

d

Outdoorunit

Indoorunits

15 m

15 m

10 m


UNIT: mm



Piping length each indoor unit (a, b, c, d) 25 m Total piping length (a+b+c+d) 70 m Bending point for each unit 25 Total bending point 70



UNIT: mm (inch)Outdoor unit union diameter

For





OBH723B

35

When relocating or disposing of the air conditioner, pump down the system following the procedure below so that no refrigerant is released into the atmosphere.1) Turn off the breaker.2) Connect the gauge manifold valve to the service port of the stop valve on the gas pipe side of the outdoor unit.3) Fully close the stop valve on the liquid pipe side of the outdoor unit.4) Turn on the breaker.5) Start the emergency COOL operation on all the indoor units.6) When the pressure gauge shows 0.05 to 0 MPa [Gauge] (approximately 0.5 to 0 kgf/cm²), fully close the stop valve on the gas

pipe side of the outdoor unit and stop the operation. (Refer to the indoor unit installation manual about the method for stopping the operation.) * If too much refrigerant has been added to the air conditioner system, the pressure may not drop to 0.05 to 0 MPa [Gauge] (ap-proximately 0.5 to 0 kgf/cm²), or the protection function may operate due to the pressure increase in the high-pressure refriger-ant circuit. If this occurs, use a refrigerant collecting device to collect all of the refrigerant in the system, and then recharge the system with the correct amount of refrigerant after the indoor and outdoor units have been relocated.

7) Turn off the breaker. Remove the pressure gauge and the refrigerant piping.

When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes. The compressor may burst and cause injury if any foreign substance, such as air, enters the pipes.

WARNING

PUMPING DOWN

OBH723B

36

PERFORMANCE CURVES8

The standard specifications apply only to the operation of the air conditioner under normal conditions.Since operating conditions vary according to the areas where these units are installed, the following information has been pro-vided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.(1) GUARANTEED VOLTAGE 198 - 264 V 50 Hz(2) AIR FLOW Air flow should be set at MAX.(3) MAIN READINGS (1) Indoor intake air wet-bulb temperature: °CWB (2) Indoor outlet air wet-bulb temperature: °CWB (3) Outdoor intake air dry-bulb temperature: °CDB (4) Total input: W (5) Indoor intake air dry-bulb temperature: °CDB (6) Outdoor intake air wet-bulb temperature: °CWB (7) Total input: W

Indoor air wet and dry bulb temperature difference on the left side of the following chart shows the difference between the indoor intake air wet and dry bulb temperature and the indoor outlet air wet and dry bulb temperature for your reference at service.

How to measure the indoor air wet and dry bulb temperature difference1. Attach at least 2 sets of wet and dry bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets

of wet and dry bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high.

2. Attach at least 2 sets of wet and dry bulb thermometers to the outdoor air intake. Cover the thermometers to prevent direct rays of the sun.3. Check that the air filter is cleaned.4. Open windows and doors of room.5. Press the EMERGENCY OPERATION switch once (twice) to start the EMERGENCY COOL (HEAT) MODE.6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.7. 10 minutes later, measure temperature again and check that the temperature does not change.

INDOOR UNIT OUTDOOR UNIT

}}

Cooling

Heating

Wet and dry bulbthermometersBACK VIEW

Wet and dry bulbthermometersFRONT VIEW

MXZ-3E54VA MXZ-3E68VA MXZ-4E72VAMXZ-4E83VA MXZ-5E102VA MXZ-2E53VAHZ MXZ-4E83VAHZ

OBH723B

37

8-1. CAPACITY AND THE INPUT CURVES

Indo

or a

ir W

et-b

ulb

tem

pera

ture

diff

eren

ce (°

C)

Outdoor intake air Dry-bulb temperature (°C)46454645

Outdoor intake air Dry-bulb temperature (°C)

Indoor intake air Wet-bulb temperature (°C) Indoor intake air Wet-bulb temperature (°C)

22 c

lass

8.5

7.8

7.1

6.4

5.8

5.1

6.3

5.8

5.3

4.8

4.3

3.9

4.1

3.8

3.5

3.2

2.9

2.6

9.3

8.5

7.8

7.0

6.3

5.6

8.0

7.3

6.7

6.0

5.4

4.860

cla

ss

10.6

9.7

8.8

7.9

7.1

6.3

13.1

11.9

10.8

9.7

8.7

7.7

9.5

8.7

8.0

7.2

6.5

5.7

13.7

12.4

11.3

10.1

9.0

8.0

50 c

lass

35 c

lass

42 c

lass

25 c

lass

15 c

lass

18 c

lass

20 c

lass

MXZ-3E54VA MXZ-3E68VA MXZ-4E72VA

25.417.1

15.8

14.5

13.2

11.8

10.5

9.2

7.9

19.7

18.2

16.7

15.2

13.6

12.1

10.6

9.1

23.4

21.5

19.5

17.6

15.6

13.7

11.7

24.0

22.2

20.3

18.5

16.6

14.8

12.9

11.1

22 c

lass

25 c

lass

60 c

lass

25.9

23.9

21.9

19.9

17.9

15.9

13.9

12.0

31.4

29.0

26.6

24.1

21.7

19.3

16.9

14.5

31.9

29.4

27.0

24.5

22.1

19.6

17.2

14.7

35 c

lass

50 c

lass

27.0

24.9

22.8

20.7

18.7

16.6

14.5

12.4

42 c

lass

15 c

lass

19.0

17.6

16.1

14.5

13.0

11.6

10.0

8.6

18 c

lass

20 c

lass

Indo

or a

ir Dr

y-bu

lb te

mpe

ratu

redi

ffere

nce

(°C)

Outdoor intake air Wet-bulb temperature (°C) Outdoor intake air Wet-bulb temperature (°C)

Indoor intake air Dry-bulb temperature (°C)


OBH723B

38

MXZ-4E83VA MXZ-5E102VA MXZ-4E83VAHZ

Indo

or a

ir W

et-b

ulb

tem

pera

ture

diffr

renc

e (°C

)

22 c

lass

5.2

4.8

4.4

4.0

3.6

3.2

6.0

5.5

5.0

4.6

4.1

3.7

8.8

8.0

7.3

6.6

6.0

5.3

11.2

10.2

9.3

8.4

7.5

6.6

8.8

8.0

7.3

6.6

6.0

5.3

9.0

8.2

7.5

6.8

6.1

5.4

42 c

lass

35 c

lass

12.8

11.6

10.6

9.5

8.5

7.5

50 c

lass

25 c

lass

Indo

or a

ir W

et-b

ulb

tem

pera

ture

diffr

renc

e (°C

)


4645

4645


Indoor intake air Wet-bulb temperature (°C)


22 c

lass

5.2

4.8

4.4

4.0

3.6

3.2

6.0

5.5

5.0

4.6

4.1

3.7

5.8

5.4

4.9

4.5

4.0

3.6

7.4

6.8

6.2

5.7

5.1

4.5

5.8

5.4

4.9

4.5

4.0

3.6

7.4

6.8

6.2

5.7

5.1

4.5

71 c

lass

60 c

lass

8.8

8.0

7.3

6.6

6.0

5.3

11.2

10.2

9.3

8.4

7.5

6.6

8.8

8.0

7.3

6.6

6.0

5.3

9.0

8.2

7.5

6.8

6.1

5.4

42 c

lass

35 c

lass

12.8

11.6

10.6

9.5

8.5

7.550

cla

ss

25 c

lass

15 c

lass

20 c

lass

15 c

lass

4.1

3.8

3.5

3.2

2.9

2.6

4.1

3.8

3.5

3.2

2.9

2.6

18 c

lass

18 c

lass

20 c

lass

71 c

lass

60 c

lass

Indo

or a

ir Dr

y-bu

lb te

mpe

ratu

redi

ffere

nce

(°C)

Outdoor intake air Wet-bulb temperature (°C)




18.2

16.8

15.4

13.9

12.5

11.1

9.7

8.2

18.2

16.8

15.4

13.9

12.5

11.1

9.7

8.2

22 c

lass

25 c

lass

21.4

19.7

18.1

16.3

14.6

13.0

11.5

9.6

28.9

26.6

24.4

21.9

19.7

17.6

15.7

13.0

20.7

19.1

17.5

15.7

14.2

12.6

11.1

9.3

26.3

24.3

22.3

20.0

18.0

16.0

14.2

11.9

35 c

lass

42 c

lass

29.8

27.5

25.2

22.7

20.4

18.1

16.2

13.4

50 c

lass

Indo

or a

ir Dr

y-bu

lb te

mpe

ratu

redi

ffere

nce

(°C)

18.2

16.8

15.4

13.9

12.5

11.1

9.7

8.2

17.0

15.7

14.4

12.9

11.6

10.3

9.0

7.7

20.5

18.9

17.3

15.6

14.0

12.4

11.0

9.2

17.0

15.7

14.4

12.9

11.6

10.3

9.0

7.7

20.5

18.9

17.3

15.6

14.0

12.4

11.0

9.2

18.2

16.8

15.4

13.9

12.5

11.1

9.7

8.2

22 c

lass

25 c

lass

60 c

lass

71 c

lass

21.4

19.7

18.1

16.3

14.6

13.0

11.5

9.6

28.9

26.6

24.4

21.9

19.7

17.6

15.7

13.0

20.7

19.1

17.5

15.7

14.2

12.6

11.1

9.3

26.3

24.3

22.3

20.0

18.0

16.0

14.2

11.9

35 c

lass

42 c

lass

29.8

27.5

25.2

22.7

20.4

18.1

16.2

13.4

50 c

lass

15 c

lass

20 c

lass

15 c

lass

18.2

16.8

15.4

13.9

12.5

11.1

9.7

8.2

18.2

16.8

15.4

13.9

12.5

11.1

9.7

8.2

18 c

lass

18 c

lass

20 c

lass

60 c

lass

71 c

lass

OBH723B

39

MXZ-2E53VAHZ


4645

4645




Indo

or a

ir W

et-b

ulb

tem

pera

ture

diffr

renc

e (°C

)

22 c

lass

5.2

4.8

4.4

4.0

3.6

3.2

6.0

5.5

5.0

4.6

4.1

3.7

8.8

8.0

7.3

6.6

6.0

5.3

11.2

10.2

9.3

8.4

7.5

6.6

42 c

lass

35 c

lass

12.8

11.6

10.6

9.5

8.5

7.5

50 c

lass

25 c

lass

Indo

or a

ir W

et-b

ulb

tem

pera

ture

diffr

renc

e (°C

)

22 c

lass

5.2

4.8

4.4

4.0

3.6

3.2

6.0

5.5

5.0

4.6

4.1

3.7

5.8

5.4

4.9

4.5

4.0

3.6

7.4

6.8

6.2

5.7

5.1

4.5

5.8

5.4

4.9

4.5

4.0

3.6

7.4

6.8

6.2

5.7

5.1

4.5

8.8

8.0

7.3

6.6

6.0

5.3

11.2

10.2

9.3

8.4

7.5

6.642

cla

ss

35 c

lass

12.8

11.6

10.6

9.5

8.5

7.5

50 c

lass

25 c

lass

15 c

lass

20 c

lass

15 c

lass

4.1

3.8

3.5

3.2

2.9

2.6

4.1

3.8

3.5

3.2

2.9

2.6

18 c

lass

18 c

lass

20 c

lass





Indo

or a

ir Dr

y-bu

lb te

mpe

ratu

redi

ffere

nce

(°C)

18.2

16.8

15.4

13.9

12.5

11.1

9.7

8.2

18.2

16.8

15.4

13.9

12.5

11.1

9.7

8.2

22 c

lass

25 c

lass

21.4

19.7

18.1

16.3

14.6

13.0

11.5

9.6

28.9

26.6

24.4

21.9

19.7

17.6

15.7

13.0

35 c

lass

42 c

lass

29.8

27.5

25.2

22.7

20.4

18.1

16.2

13.4

50 c

lass

Indo

or a

ir Dr

y-bu

lb te

mpe

ratu

redi

ffere

nce

(°C)

18.2

16.8

15.4

13.9

12.5

11.1

9.7

8.2

17.0

15.7

14.4

12.9

11.6

10.3

9.0

7.7

20.5

18.9

17.3

15.6

14.0

12.4

11.0

9.2

17.0

15.7

14.4

12.9

11.6

10.3

9.0

7.7

20.5

18.9

17.3

15.6

14.0

12.4

11.0

9.2

18.2

16.8

15.4

13.9

12.5

11.1

9.7

8.2

22 c

lass

25 c

lass

21.4

19.7

18.1

16.3

14.6

13.0

11.5

9.6

28.9

26.6

24.4

21.9

19.7

17.6

15.7

13.0

35 c

lass

42 c

lass

29.8

27.5

25.2

22.7

20.4

18.1

16.2

13.4

50 c

lass

15 c

lass

20 c

lass

15 c

lass

18.2

16.8

15.4

13.9

12.5

11.1

9.7

8.2

18.2

16.8

15.4

13.9

12.5

11.1

9.7

8.2

18 c

lass

18 c

lass

20 c

lass

OBH723B

40

8-2. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY (single operation)

0 50 100 150

1.0

1.5

2.0

2.5

<HEAT>Capacity <HEAT>Total input

FrequencyHz

FrequencyHz0 50 100 150

1.0

1.5

2.0

2.5

0 50 100 150

1.0

1.5

2.0

2.5


FrequencyHz


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5<HEAT>Capacity

FrequencyHz 0 50 100 150

0.5

1.0

1.5<HEAT>Total input

FrequencyHz


FrequencyHz


1.0

1.5

2.0

<COOL>Capacity

FrequencyHz

<COOL>Total input


1.0

1.5

2.0

2.5

0 50 100 150

1.0

1.5

2.0

2.5

<COOL>Capacity

FrequencyHz

<COOL>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5<COOL>Capacity


0.5

1.0

1.5<COOL>Total input

FrequencyHz

<COOL>Capacity


1.0

1.5



1.0

1.5

2.0

MXZ-3E54VA 15-class unit

22-class unit

18-class unit

20-class unit

OBH723B

41

25-class unit

0 50 100 150

0.5

1.0

1.5<COOL>Capacity


0.5

1.0

1.5<HEAT>Capacity

FrequencyHz

0 50 100 150

0.5

1.0

1.5<COOL>Capacity


0.5

1.0

1.5<HEAT>Capacity

FrequencyHz

0 50 100 150

0.5

1.0



0.5

1.0


FrequencyHz

0 50 100 150

0.5

1.0



0.5

1.0


FrequencyHz

<COOL>Capacity

FrequencyHz

<HEAT>Capacity

FrequencyHz

<COOL>Total input

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5<COOL>Capacity


0.5

1.0

1.5<HEAT>Capacity


0.5

1.0



0.5

1.0


FrequencyHz

MXZ-3E54VA

35-class unit

42-class unit

50-class unit

OBH723B

42

<COOL>Capacity

FrequencyHz

<COOL>Total input

FrequencyHz

<COOL>Capacity


1.0

1.5



1.0

1.5

2.0

<COOL>Capacity

FrequencyHz 0 50 100 1500.5

1.0

1.5


FrequencyHz0 50 100 1500.5

1.0

1.5

2.0

<COOL>Capacity


1.0

1.5


FrequencyHz

0 50 100 150

1.0

1.5

2.0

2.5

0 50 100 150

1.0

1.5

2.0

2.5

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0

0 50 100 150

0.5

1.0

1.5


FrequencyHz

FrequencyHz


FrequencyHz


1.0

1.5

2.0


FrequencyHz

FrequencyHz



0.5

1.0

1.5

FrequencyHz

0 50 100 150

1.0

1.5

2.0

2.5

0 50 100 150

1.0

1.5

2.0

2.5

0 50 100 150

1.0

1.5

2.0

2.5

3.0



0.5

1.0

1.5


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5


22-class unit

25-class unit

20-class unit

18-class unit

OBH723B

43

<COOL>Capacity

FrequencyHz

<COOL>Total input

FrequencyHz


FrequencyHz

FrequencyHz

<COOL>Capacity


0.5

1.0


FrequencyHz


FrequencyHz

FrequencyHz

<COOL>Capacity

FrequencyHz

<COOL>Total input

FrequencyHz


FrequencyHz

FrequencyHz

<COOL>Capacity

FrequencyHz

<COOL>Total input

FrequencyHz


FrequencyHz

FrequencyHz

0 50 100 150

0.5

1.0

1.5

2.0

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5


42-class unit

50-class unit

60-class unit

OBH723B

44

MXZ-4E72VA

<COOL>Capacity

FrequencyHz

<COOL>Total input

FrequencyHz


FrequencyHz

FrequencyHz

<COOL>Capacity


1.0

1.5


FrequencyHz


0 50 100 150

1.0

1.5

2.0

FrequencyHz


1.0

1.5

2.0

<COOL>Capacity


1.0

1.5


FrequencyHz


0 50 100 1500.5

1.0

1.5

2.0

FrequencyHz

FrequencyHz

<COOL>Capacity


1.0

1.5


FrequencyHz



0.5

1.0

1.5

FrequencyHz

0 50 100 150

1.0

1.5

2.0

2.5

0 50 100 150

1.0

1.5

2.0

2.5

0 50 100 150

1.0

1.5

2.0

2.5

0 50 100 150

1.0

1.5

2.0

2.5

0 50 100 150

1.0

1.5

2.0

2.5

3.0

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0<HEAT>Capacity <HEAT>Total input


0.5

1.0

1.5


0.5

1.0

1.5

15-class unit

22-class unit

25-class unit

20-class unit

18-class unit

OBH723B

45

MXZ-4E72VA

<COOL>Capacity

FrequencyHz

<COOL>Total input

FrequencyHz


FrequencyHz

FrequencyHz

<COOL>Capacity


0.5

1.0


FrequencyHz


FrequencyHz

FrequencyHz

<COOL>Capacity

FrequencyHz

<COOL>Total input

FrequencyHz


FrequencyHz

FrequencyHz

<COOL>Capacity

FrequencyHz

<COOL>Total input

FrequencyHz


FrequencyHz

FrequencyHz

0 50 100 150

0.5

1.0

1.5

2.0

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

35-class unit

42-class unit

50-class unit

60-class unit

OBH723B

46

MXZ-4E83VA

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5


0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5


0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0



0.5

1.0

1.5


0.5

1.0

1.5

2.0



0.5

1.0

1.5


0.5

1.0

1.5

2.0



0.5

1.0

1.5

2.0


1

2

3



0.5

1.0

1.5


0.5

1.0

1.5

2.0



0.5

1.0

1.5

2.0


1

2

3

15-class unit

22-class unit

25-class unit

20-class unit

18-class unit

OBH723B

47

MXZ-4E83VA

<COOL>Capacity

FrequencyHz

<COOL>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

42-class unit

50-class unit

60-class unit

71-class unit

35-class unit

OBH723B

48

MXZ-5E102VA

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5


0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

FrequencyHz0 50 100 1500.0

0.5

1.0

1.5

2.0

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5


0.5

1.0

1.5



0.5

1.0

1.5


0.5

1.0

1.5

2.0



0.5

1.0

1.5

2.0


1

2

3



0.5

1.0

1.5


0.5

1.0

1.5

2.0



0.5

1.0

1.5

2.0


1

2

3



0.5

1.0

1.5


0.5

1.0

1.5

2.0

15-class unit

22-class unit

25-class unit

20-class unit

18-class unit

OBH723B

49

MXZ-5E102VA

<COOL>Capacity

FrequencyHz

<COOL>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

42-class unit

50-class unit

60-class unit

71-class unit

35-class unit

OBH723B

50

MXZ-2E53VAHZ

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5


0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5


0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0



0.5

1.0

1.5


0.5

1.0

1.5

2.0



0.5

1.0

1.5


0.5

1.0

1.5

2.0



0.5

1.0

1.5

2.0


1

2

3



0.5

1.0

1.5


0.5

1.0

1.5

2.0



0.5

1.0

1.5

2.0


1

2

3

15-class unit

22-class unit

25-class unit

20-class unit

18-class unit

OBH723B

51

MXZ-2E53VAHZ

<COOL>Capacity

FrequencyHz

<COOL>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

42-class unit

50-class unit

35-class unit

OBH723B

52

MXZ-4E83VAHZ

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5


0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0

<COOL>Capacity

FrequencyHz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0



0.5

1.0

1.5


0.5

1.0

1.5



0.5

1.0

1.5


0.5

1.0

1.5



0.5

1.0

1.5


0.5

1.0

1.5



0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0

2.5



0.5

1.0

1.5

2.0


0.5

1.0

1.5

2.0

15-class unit

22-class unit

25-class unit

20-class unit

18-class unit

OBH723B

53

MXZ-4E83VAHZ

<COOL>Capacity

FrequencyHz

<HEAT>Capacity

FrequencyHz

<COOL>Total input

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<HEAT>Capacity

FrequencyHz

<COOL>Total input

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Capacity

FrequencyHz

<HEAT>Capacity

FrequencyHz

<COOL>Total input

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<HEAT>Capacity

FrequencyHz

<COOL>Total input

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

FrequencyHz

<HEAT>Capacity

FrequencyHz

<COOL>Total input

FrequencyHz

<HEAT>Total input


0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

2.0

42-class unit

50-class unit

60-class unit

71-class unit

35-class unit

OBH723B

54

1. Press EMERGENCY OPERATION switch to start COOL or HEAT mode (COOL: Press once, HEAT: Press twice).2. Test run operation starts and continues to operate for 30 minutes.3. Compressor operates at rated frequency.4. Indoor fan operates at High speed.5. After 30 minutes, test run operation finishes and EMERGENCY OPERATION starts (Operation frequency of compressor varies).6. To cancel test run operation or EMERGENCY OPERATION, press EMERGENCY OPERATION switch or any button on remote controller.

8-3. HOW TO OPERATE FIXED-FREQUENCY OPERATION <Test run operation>

Both indoor and outdoor units are under the same temperature/humidity condition.

Operation: TEST RUN OPERATION (Refer to 8-3.)

Dry-bulb temperature ( ) Relative humidity (%)

20 50

25 60

30 70

8-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT CURVE (single operation)NOTE: The unit of pressure has been changed to MPa on the international system of units (SI unit system). The conversion factor is: 1 (MPa [Gauge]) = 10.2 (kgf/cm2 [Gauge])(1) COOL operation

15-class unit

MXZ-3E54VA

Out

door

low

pre

ssur

e

(MPa[Gauge])

Ambient temperature ( )Ambient humidity (%)


Out

door

uni

t cur

rent

(A)

50 60 70 (%)

40Hz13

12

11

10

8

9

7

6

40Hz

15 20 25 30 350.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

50 60 70 (%)15 20 25 30 35

1

2

3

4

5

6

18-class unit



Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)

15 20 25 30 3550 60 70

0.6

0.7

0.8

0.9

1.0

1.1

1.2

(%)15 20 25 30 35

50 60 70 (%)

40Hz

1

2

3

4

5

40Hz

12

11

10

9

8

7

6

22-class unit 20-class unit



Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)

15 20 25 30 3550 60 70

0.6

0.7

0.8

0.9

1.0

1.1

1.2

(%)15 20 25 30 35

50 60 70 (%)

40Hz

1

2

3

4

5

40Hz

12

11

10

9

8

7

6

Out

door

low

pre

ssur

e

(MPa[Gauge])



Out

door

uni

t cur

rent

(A)

50 60 70 (%)

40Hz13

12

11

10

8

9

7

6

40Hz

15 20 25 30 350.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

50 60 70 (%)15 20 25 30 35

1

2

3

4

5

6

OBH723B

55

25-class unit



Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)

0.6

0.7

0.8

0.9

1.0

1.1

1.240Hz

1

2

3

4

5

40Hz

12

11

10

9

8

7

615 20 25 30 35

50 60 70 (%)15 20 25 30 35

50 60 70 (%)

35-class unit



Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)

0.7

0.8

0.9

1.0

1.1

1.2

1.340Hz

1

2

3

4

5

40Hz

13

12

11

10

9

8

715 20 25 30 35

50 60 70 (%)15 20 25 30 35

50 60 70 (%)

MXZ-3E54VA

42-class unit



Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)13

12

11

10

9

8

7

(%) 50 60 70 (%)15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.340Hz

15 20 25 30 351

2

3

4

5

40Hz

50-class unit



Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)

0.7

0.8

0.9

1.0

1.1

1.2

1.340Hz

1

2

3

4

5

40Hz

13

12

11

10

9

8

715 20 25 30 35

50 60 70 (%)15 20 25 30 35

50 60 70 (%)

15-class unitMXZ-3E68VA MXZ-4E72VA

Out

door

low

pre

ssur

e

(MPa[Gauge])



Out

door

uni

t cur

rent

(A)

50 60 70 (%)

30Hz13

12

11

10

8

9

7

6

30Hz

15 20 25 30 350.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

50 60 70 (%)15 20 25 30 35

1

2

3

4

5

6

18-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])



Out

door

uni

t cur

rent

(A)

50 60 70 (%)

30Hz14

13

12

11

9

10

8

7

30Hz

15 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

50 60 70 (%)15 20 25 30 35

1

2

3

4

5

6

20-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])



Out

door

uni

t cur

rent

(A)

50 60 70 (%)

30Hz13

12

11

10

8

9

7

6

30Hz

15 20 25 30 350.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

50 60 70 (%)15 20 25 30 35

1

2

3

4

5

6

22-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])



Out

door

uni

t cur

rent

(A)

50 60 70 (%)

30Hz14

13

12

11

9

10

8

7

30Hz

15 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

50 60 70 (%)15 20 25 30 35

1

2

3

4

5

6

OBH723B

56


42-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])



Out

door

uni

t cur

rent

(A)

50 60 70 (%)

30Hz14

13

12

11

9

10

8

7

30Hz

15 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

50 60 70 (%)15 20 25 30 35

1

2

3

4

5

6

50-class unitO

utdo

or lo

w p

ress

ure

(MPa[Gauge])



Out

door

uni

t cur

rent

(A)

50 60 70 (%)

30Hz14

13

12

11

9

10

8

7

30Hz

15 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

50 60 70 (%)15 20 25 30 35

1

2

3

4

5

6

60-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])



Out

door

uni

t cur

rent

(A)

50 60 70 (%)

30Hz14

13

12

11

9

10

8

7

30Hz

15 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

50 60 70 (%)15 20 25 30 35

1

2

3

4

5

6


Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

12

11

10

9

8

7

615 20 25 30 350.6

0.7

0.8

0.9

1.0

1.1

1.2

15 20 25 30 351

2

3

4

5

6

18-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

25-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])



Out

door

uni

t cur

rent

(A)

50 60 70 (%)

30Hz14

13

12

11

9

10

8

7

30Hz

15 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

50 60 70 (%)15 20 25 30 35

1

2

3

4

5

6

35-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])



Out

door

uni

t cur

rent

(A)

50 60 70 (%)

30Hz14

13

12

11

9

10

8

7

30Hz

15 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

50 60 70 (%)15 20 25 30 35

1

2

3

4

5

6

OBH723B

57

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

25-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

35-class unit


Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

12

11

10

9

8

7

615 20 25 30 350.6

0.7

0.8

0.9

1.0

1.1

1.2

15 20 25 30 351

2

3

4

5

6

22-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

42-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

14

13

12

11

10

9

815 20 25 30 350.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 351

2

3

4

5

6

60-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

50-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

14

13

12

11

10

9

815 20 25 30 350.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

71-class unit

OBH723B

58


Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

12

11

10

9

8

7

615 20 25 30 350.6

0.7

0.8

0.9

1.0

1.1

1.2

15 20 25 30 351

2

3

4

5

6

20-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

12

11

10

9

8

7

615 20 25 30 350.6

0.7

0.8

0.9

1.0

1.1

1.2

15 20 25 30 351

2

3

4

5

6

22-class unit

Out

door

low

pre

ssur

e(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

18-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

25-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

35-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

42-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

50-class unit

OBH723B

59

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz24Hz

14

13

12

11

10

9

815 20 25 30 350.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 351

2

3

4

5

6

60-class unitMXZ-5E102VA

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz24Hz

14

13

12

11

10

9

815 20 25 30 350.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 351

2

3

4

5

6

71-class unit

MXZ-2E53VAHZ 15-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

12

11

10

9

8

7

615 20 25 30 350.6

0.7

0.8

0.9

1.0

1.1

1.2

15 20 25 30 351

2

3

4

5

6

18-class unitO

utdo

or lo

w p

ress

ure

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

20-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

12

11

10

9

8

7

615 20 25 30 350.6

0.7

0.8

0.9

1.0

1.1

1.2

15 20 25 30 351

2

3

4

5

6

22-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

25-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

35-class unit

OBH723B

60

MXZ-2E53VAHZ

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

42-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

24Hz

24Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

50-class unit


Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

18Hz

18Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

18-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

18Hz

18Hz

14

13

12

12

10

9

815 20 25 30 350.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 351

2

3

4

5

6

20-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

18Hz

18Hz

13

12

11

10

9

8

715 20 25 30 350.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 351

2

3

4

5

6

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

18Hz

18Hz

14

13

12

12

10

9

815 20 25 30 350.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 351

2

3

4

5

6

25-class unit

22-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

18Hz

18Hz

14

13

12

12

10

9

815 20 25 30 350.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 351

2

3

4

5

6

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

18Hz

18Hz

14

13

12

11

10

9

815 20 25 30 350.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 351

2

3

4

5

6

35-class unit

OBH723B

61

MXZ-4E83VAHZ

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

18Hz

18Hz

15

13

12

11

10

9

8

14

15 20 25 30 350.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

15 20 25 30 351

2

3

4

5

6

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

18Hz

18Hz

15

13

12

11

10

9

8

14

15 20 25 30 350.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

15 20 25 30 351

2

3

4

5

6

50-class unit

60-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

18Hz

18Hz

15

13

12

11

10

9

8

14

15 20 25 30 350.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

15 20 25 30 351

2

3

4

5

6

71-class unit

Out

door

low

pre

ssur

e

(MPa[Gauge])

Out

door

uni

t cur

rent

(A)



50 60 70 (%) 50 60 70 (%)

18Hz

18Hz

14

13

12

11

10

9

815 20 25 30 350.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 351

2

3

4

5

6

42-class unit

OBH723B

62

Condition:

Operation: TEST RUN OPERATION (Refer to 8-3.)

(2) HEAT operation

Dry bulb temperature (°C)Indoor20.014.5

21

Outdoor76

1512

20.014.5Wet bulb temperature (°C)

22-class unit


MXZ-3E54VA



50 10 15 20 252

3

4

5

6

7

Ambient temperature ( )

48Hz

Out

door

uni

t cur

rent

(A)

50 10 15 20 252

3

4

5

6

7


48Hz

Out

door

uni

t cur

rent

(A)

50 10 15 20 252

3

4

5

6

7


48Hz

Out

door

uni

t cur

rent

(A)


Out

door

uni

t cur

rent

(A)

48Hz

0 5 10 15 20 252

3

4

5

6

7

50 10 15 20 252

3

4

5

6

7


48Hz

Out

door

uni

t cur

rent

(A)


Out

door

uni

t cur

rent

(A)

48Hz

0 5 10 15 20 252

3

4

5

6

7

Out

door

uni

t cur

rent

(A)


48Hz

0 5 10 15 20 252

3

4

5

6

7

18-class unit

50 10 15 20 252

3

4

5

6

7


48Hz

Out

door

uni

t cur

rent

(A)

22-class unit






Out

door

uni

t cur

rent

(A)

36Hz

0 5 10 15 20 252.0

3.0

4.0

5.0

6.0

7.0


Out

door

uni

t cur

rent

(A)

36Hz

0 5 10 15 20 253.0

4.0

5.0

6.0

7.0

8.0


Out

door

uni

t cur

rent

(A)

36Hz

0 5 10 15 20 252.0

3.0

4.0

5.0

6.0

7.0


Out

door

uni

t cur

rent

(A)

36Hz

0 5 10 15 20 253.0

4.0

5.0

6.0

7.0

8.0


Out

door

uni

t cur

rent

(A)

36Hz

0 5 10 15 20 253.0

4.0

5.0

6.0

7.0

8.0


Out

door

uni

t cur

rent

(A)

36Hz

0 5 10 15 20 253.0

4.0

5.0

6.0

7.0

8.0


Out

door

uni

t cur

rent

(A)

36Hz

0 5 10 15 20 253.0

4.0

5.0

6.0

7.0

8.0

18-class unit


Out

door

uni

t cur

rent

(A)

36Hz

0 5 10 15 20 253.0

4.0

5.0

6.0

7.0

8.0

OBH723B

63

60-class unit


Out

door

uni

t cur

rent

(A)

36Hz

0 5 10 15 20 252.0

3.0

4.0

5.0

6.0

7.0

35-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

42-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

50-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

60-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)


0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)


20-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

71-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

18-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)


0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

18-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)


0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

25-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

35-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)


50-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

42-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

OBH723B

64

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)


0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

MXZ-5E102VA

35-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

42-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

50-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)


0 5 10 15 20 252

3

4

5

6

7


32HzO

utdo

or u

nit c

urre

nt (A

)


20-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)

18-class unit

0 5 10 15 20 252

3

4

5

6

7


32Hz

Out

door

uni

t cur

rent

(A)


0 5 10 15 20 252

3

4

5

6

7


20Hz

Out

door

uni

t cur

rent

(A)

18-class unit

0 5 10 15 20 252

3

4

5

6

7


20Hz

Out

door

uni

t cur

rent

(A)

0 5 10 15 20 252

3

4

5

6

7


20Hz

Out

door

uni

t cur

rent

(A)


0 5 10 15 20 252

3

4

5

6

7


20Hz

Out

door

uni

t cur

rent

(A)

25-class unit

0 5 10 15 20 252

3

4

5

6

7


20Hz

Out

door

uni

t cur

rent

(A)

35-class unit

0 5 10 15 20 252

3

4

5

6

7


20Hz

Out

door

uni

t cur

rent

(A)

50-class unit

0 5 10 15 20 252

3

4

5

6

7


20Hz

Out

door

uni

t cur

rent

(A)

42-class unit

0 5 10 15 20 252

3

4

5

6

7


20Hz

Out

door

uni

t cur

rent

(A)

0 5 10 15 20 252

3

4

5

6

7


20Hz

Out

door

uni

t cur

rent

(A)


0 5 10 15 20 252

3

4

5

6

7


20Hz

Out

door

uni

t cur

rent

(A)

OBH723B

65

ACTUATOR CONTROL9

Relation between main sensor and actuator

Sensor PurposeActuator

Compressor LEV Outdoorfan motor 4-way valve Defrost

heater 1Discharge temperature thermistor Protection

Indoor coil temperature thermistor

Cooling: Coil frost preventionHeating: High pressure protection

Defrost thermistor Heating: DefrostingFin temperature thermistor ProtectionAmbient temperature thermistor

Control/ProtectionHeating: Defrosting (Heater)

Outdoor heat exchanger temperature thermistor Cooling: Control/Protection

Capacity code Control1 MXZ-2E53VAHZ, 4E83VAHZ


OBH723B

66

SERVICE FUNCTIONS10

10-1. PRE-HEAT CONTROLIf moisture gets into the refrigerant cycle, or when refrigerant is liquefied and collected in the compressor, it may interfere the start-up of the compressor.To improve start-up condition, the compressor is energized even while it is not operating. This is to generate heat at the winding.The compressor uses about 50 W when pre-heat control is turned ON.Pre-heat control is ON at initial setting.

[How to deactivate pre-heat control]

Turn OFF the power supply for the air conditioner before making the setting. Set the "4" of SW2 on the outdoor control P.C. board to ON to deactivate pre-heat control function.

Turn ON the power supply for the air conditioner.

NOTE: Pre-heat control will be turned OFF when the breaker is turned OFF.

Outdoor control P.C. board

SW871

LED

SW1

With this function, you can lock the operation mode of the outdoor unit. Once the operation mode is locked to either COOL/DRY mode or HEAT mode, the air conditioner operates in that mode only.Default setting is required to activate this function. Please explain about this function to your customers and ask them whether they want to use it.

[How to lock the operation mode](1) Turn OFF the power supply and make sure that the LED goes off. (2) Set SW1 on the outdoor control P.C. board.(3) Turn ON the power supply.

10-2. LOCKING THE OPERATION MODE OF THE AIR CONDITIONER (COOL, DRY, HEAT) (MXZ-4E83VAHZ)

ON

5 6

SW1ON

5 6

SW1Cool/Dry Heat

10-3. LOWERING THE OPERATING NOISE OF THE OUTDOOR UNIT (MXZ-4E83VAHZ)With this function, you can lower the operating noise of the outdoor unit when the operation load is small, for example, during night time in COOL mode. However, note that the cooling and heating capacity can also be lowered if this function is activated.Default setting is required to activate this function. Please explain about this function to your customers and ask them whether they want to use it.

[How to lower the operating noise](1) Turn OFF the power supply and make sure that the LED goes off. (2) Set the "5" Switch of SW1 on the outdoor control P.C. board to ON to enable this function.(3) Turn ON the power supply.

ON

5 6

SW1


OBH723B

67

10-4. AUTO LINE CORRECTING Outdoor unit has an auto line correcting function which automatically detects and corrects improper wiring or piping.

Improper wiring or piping can be automatically detected by pressing the piping/wiring correction switch (SW871). When improper wiring or piping is detected, wiring lines are corrected. This will be completed in about 10 to 20 minutes.

[How to activate this function]

2. Check that the stop valves of the liquid pipe and gas pipe are open. 3. Check that the wiring between indoor and outdoor unit is correct. (If the wiring is not correct, this function does not work.) 4. Turn ON the power supply and wait at least 1 minute. 5. Press the piping/wiring correction switch (SW871) on the outdoor control P.C. board. Do not touch energized parts.

6. Press the switch to cancel.

NOTE: Indoor unit cannot be operated while this function is activated. When this function is activated while indoor unit is operating, the operation will be stopped. Operate indoor unit after the auto line correcting is finished. Pressing the switch during detection cancels this function.

Make sure that the valves are open and the pipes are not collapsed or clogged.

LED indication after cancel :

LED1 (Red)Lighted

LED indication during detection:

LED indication after detection:

LED2 (Yellow)Lighted

LED3 (Green)Once

LED1 (Red)Lighted

LED2 (Yellow)Lighted

LED3 (Green)Not lighted

LED1 (Red)LightedOnce

LED2 (Yellow)Not lighted

Once

Other indications

LED3 (Green)LightedOnce

Completed (Problem corrected/ normal)Not completed (Detection failed)Refer to "SAFETY PRECAUTIONS WHEN LED FLASHES"located behind the service panel.

Indication

Press the switch for more than 5 seconds.LED will show the record of auto correcting for about 30 seconds as shown in the table below:

NOTE: Activate this function to confirm the correct wiring after replacing the outdoor control P.C. board. (Previous records are deleted when the outdoor control P.C. board is replaced.) The record cannot be shown if auto line correcting is not canceled (Refer to "How to activate this function").

LED1 (Red)Once

3 times

LED2 (Yellow)Once

3 times

LED3 (Green)LightedLighted

Not correctedCorrected

Number of blinks Wiring line

The record of auto line correcting can be confirmed in the following way:

OBH723B

68

10-5. CHANGING THE AMPERE LIMIT (MXZ-4E83VAHZ)With this function, the amount of current that flows in the outdoor unit can be changed.

NOTE: Use this function only when the amount of current exceeds the allowed value.

[How to change the ampere limit](1) Be sure to turn off the main power for the air conditioner before making the setting.(2) Make the setting referring to the table below.(3) Turn ON the power supply. SW2 on the outdoor control P.C. board

SW2 MXZ-2E53VAHZ MXZ-4E83VAHZ

Factory setting13.6 A 21 A

18.4 A Factory setting25 A

OBH723B

69

11 TROUBLESHOOTING

3. Troubleshooting procedure1) Check if the OPERATION INDICATOR lamp on the indoor unit is fl ashing on and off to indicate an abnormality. To

make sure, check how many times the OPERATION INDICATOR lamp is fl ashing on and off before starting service work.

2) Before servicing, check that the connector and terminal are connected properly.3) When the P.C. board seems to be defective, check the copper foil pattern for disconnection and the components for

bursting and discoloration.4) Refer to 11-2, 11-3 and 11-4.

11-1. CAUTIONS ON TROUBLESHOOTING1. Before troubleshooting, check the following:

1) Check the power supply voltage.2) Check the indoor/outdoor connecting wire for miswiring.

2. Take care of the following during servicing1) Before servicing the air conditioner, be sure to turn OFF the unit fi rst with the remote controller, and after confi rming

the horizontal vane is closed, turn OFF the breaker and/or disconnect the power plug.2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the P.C. board.3) When removing the electrical parts, be careful of the residual voltage of smoothing capacitor.4) When removing the P.C. board, hold the edge of the board with care NOT to apply stress on the components.5) When connecting or disconnecting the connectors, hold the connector housing. DO NOT pull the lead wires.

11-2. FAILURE MODE RECALL FUNCTIONThis air conditioner can memorize the abnormal condition which has occurred once.Even though LED indication listed on the troubleshooting check table (11-4.) disappears, the memorized failure details can be recalled.

1. Flow chart of failure mode recall function for the indoor/outdoor unit Refer to the service manual of indoor unit.

Lead wiring Connector housing

<Incorrect> <Correct>


OBH723B

70

2. Flow chart of the detailed outdoor unit failure mode recall function

2.Blinking pattern when outdoor unit is abnormal:

ONOFF

No beep BeepsRepeated cycle

2.5-second OFF 3-second ONBlinking at 0.5-second interval

No beep BeepsRepeated cycle

2.5-second OFF 3-second ONBlinking at 0.5-second interval

Repeated cycle

Does the OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0.5 seconds?

Blinks: The outdoor unit is abnormal. Beep is emit-ted at the same timing as the blinking of the OPERATION INDICATOR lamp. 2

Yes (Blinks)

No (OFF)

The outdoor unit might be abnormal.Check if outdoor unit is abnormal according to the following procedures.

Operational procedure

With the remote controller headed towards the indoor unit, press the TEMPERATURE buttons to adjust the set temperature to 25°C. 1

1 Regardless of normal or abnormal condition, 2 short beeps are emitted as the signal is received.

The outdoor unit is abnormal.Check the blinking pattern, and make sure that the abnormal point with the outdoor unit failure mode table (11-2.3.).Make sure to check at least 2 consecutive blinking cycles. 2

Repair the failure parts.

The outdoor unit is normal.

Release the failure mode recall function. 3

NOTE: 1. Make sure to release the failure mode recall function after it is set up, otherwise the unit cannot operate properly. 2. If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.

Delete the memorized abnormal condition. 3


3 Refer to the service manual of indoor unit.


Make sure that the remote controller is set to the failure mode recall function.3

OBH723B

71

3. Outdoor unit failure mode tableThe left lamp of OPERATION IN-DICATOR lamp

(Indoor unit)

Abnormal point(Failure mode/protection)

LED indication(Outdoor P.C.

board) Condition Remedy

Indoor/outdoor unit failure mode

recall functionLED1 LED2OFF None (Normal) Lighted Lighted2-time fl ash Outdoor power system Lighted Lighted Overcurrent protection cut-out operates 3 con-

secutive times within 1 minute after the com-pressor gets started, or converter protection cut-out or bus-bar voltage protection cut-out operates 3 consecutive times within 3 minutes after start-up.

• Check the connection of the com-pressor connecting wire.

• Refer to 11-6. "How to check inverter/compres-

sor".• Check the stop valve.

○

3-time fl ash Discharge temperature thermistor Lighted Once A thermistor shorts or opens duringcompressor running.

• Refer to 11-6. "Check of outdoor thermistors".

○

Defrost thermistor Lighted OnceAmbient temperature thermistor Lighted TwiceFin temperature thermistor Lighted 3 timesP.C. board temperature thermis-tor

Lighted 4 times • Replace the outdoor control P.C. board.

Outdoor heat exchanger tem-perature thermistor

Lighted 9 times • Refer to 11-6. "Check of outdoor thermistors".

4-time fl ash Overcurrent Once Not lighted

21 A current fl ows into power module. • Reconnect compressor connector.• Refer to 11-6. "How to check in-

verter/compressor". • Check the stop valve.

—

5-time fl ash Discharge temperature Lighted Lighted The discharge temperature exceeds 115°C (MXZ-3E54/3E68/4E72VA)/ 106°C(MXZ-4E83/5E102VA, MXZ-2E52VAHZ)/ 116°C (MXZ-4E83VAHZ) during operation. Compressor can restart if discharge tem-perature thermistor reads 80°C (MXZ-3 E 5 4 / 3 E 6 8 / 4 E 7 2 V A ) / 9 5 ° C ( M X Z -4E83/5E102VA, MXZ-2E52VAHZ)/100°C (MXZ-4E83VAHZ) or less 3 minutes later.

• Check refrigerant circuit and refrig-erant amount.

• Refer to 11-6. "Check of LEV".

—

6-time fl ash High pressure Lighted Lighted The outdoor heat exchanger temperature ex-ceeds 70°C during cooling or the indoor gas pipe temperature exceeds 70°C during heating.


• Check the stop valve.—

7-time fl ash Fin temperature 3 times Not lighted

The fin temperature exceeds 88°C (MXZ-3E54/3E68/4E72/4E83/5E102VA, MXZ-2E52VAHZ)/89°C (MXZ-4E83VAHZ) during operation.

• Check around outdoor unit.• Check outdoor unit air passage.• Refer to 11-6. "Check of outdoor

fan motor".

—P.C. board temperature 4 times Not

lightedThe P.C. board temperature exceeds 67°C (MXZ-3E54/3E68/4E72/4E83/5E102VA, MXZ-2E52VAHZ)/87°C (MXZ-4E83VAHZ) during operation.

8-time fl ash Outdoor fan motor Lighted Lighted A failure occurs 3 consecutive times within 30 seconds after the fan gets started.

• Refer to 11-6. "Check of outdoor fan motor". —

9-time fl ash Outdoor control system Lighted 5 times Nonvolatile memory data cannot be read prop-erly.

• Replace the outdoor control P.C. board. ○10-time fl ash Low discharge temperature

protectionLighted Lighted The frequency of the compressor is kept 80 Hz

or more and the discharge temperature is kept under 39°C for more than 20 minutes.


• Refer to 11-6. "Check of LEV".—

11-time fl ash Communication errorbetween P.C. boards

Lighted 6 times Communication error occurs between the out-door control P.C. board and outdoor power P.C. board for more than 10 seconds.

• Check the connecting wire between outdoor control P.C. board and out-door power P.C. board.

—

The communication between boards protec-tion cut-out operates 2 consecutive times. ○

Current sensor Lighted 7 times A short or open circuit is detected in the cur-rent sensor during compressor operating.

——

Current sensor protection cut-out operates 2 consecutive times. ○

Zero cross detecting circuit 5 times Not lighted

Zero cross signal cannot be detected while the compressor is operating.

• Check the connecting wire among outdoor control P.C. board and out-door power P.C. board.

—

The protection cut-out of the zero cross detecting circuit operates 10 consecutive times.

○Converter 5 times Not

lightedA failure is detected in the operation of the converter during operation.

• Check the voltage of power supply.• Replace the outdoor power P.C.

board.—

Bus-bar voltage 5 times Not lighted

The bus-bar voltage exceeds 400 V or falls to low level during compressor operating.

• Check the voltage of power supply.• Replace the outdoor control P.C.

board.15-time fl ash LEV and drain pump Lighted Lighted The indoor unit detects an abnormality in

the LEV and drain pump.• Refer to 11-6. "Check of LEV".• Check the drain pump of the indoor

unit.—

NOTE: Blinking patterns of this mode differ from the ones of Troubleshooting check table (11-4.).

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Operation start

Check the outdoor unit LED indicator.

Refer to 11-6. "Check of power supply".

serial signal errorRefer to 11-6. "How to check miswiring andserial signalerror".

HEAToperation onlyRefer to 11-6. "Check of R.V. coil".

room is not cool.Refer to 11-6."How to checkinverter/compressor".

exchanger of non-operating indoor unit frosts.

operating indoor unit gets warm.Refer to 11-6. "Check of LEV".

room does not get warm.Refer to 11-6."How to checkinverter/compressor".

shortage of capacity.

dew drops in thenon-operatingindoor unit.Check ofmispiping.

Refer to 11-4. "Troubleshooting check table".

Both LED1 andLED2 are OFF.

Both LED1 and LED2 are lighting.

LED1 or LED2has blinked.

11-3. INSTRUCTION OF TROUBLESHOOTING• Check the indoor unit with referring to the indoor unit service manual, and confirm that there is any problem in the indoor unit. Then, check the outdoor unit with referring to this page.

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11-4. TROUBLESHOOTING CHECK TABLENo. Symptom

Indication Abnormal point / Con-dition Condition Remedy

LED1(Red) LED2(Yellow)1 Outdoor

unit doesnot operate.

Lighted Once LEV and drain pump The indoor unit detects an abnormality in the LEV and drain pump.

• Refer to 11-6. "Check of LEV".• Check the drain pump of the indoor unit.

2

Lighted Twice Outdoor power system

Overcurrent protection cut-out operates 3 consecu-tive times within 1 minute after the compressor gets started, or converter protection cut-out or bus-bar voltage protection cut-out operates 3 consecu-tive times within 3 minutes after start-up.

• Check the connection of the compressor connect-ing wire.

• Refer to 11-6. "How to check inverter/compres-sor".

• Check the stop valve.3

Lighted 3 times Discharge temperaturethermistor

A short circuit is detected in the thermistor during operation, or an open circuit is detected in the ther-mistor after 10 minutes of compressor start-up.


4

Lighted 4 times

Fin temperaturethermistor A short or open circuit is detected in the thermistor

during operation.


P. C. board tempera-ture thermistor • Replace the outdoor control P.C. board.

5

Lighted 5 times

Ambient temperaturethermistor

A short or open circuit is detected in the thermistor during operation.


Outdoor heat ex-changer temperature thermistor

A short circuit is detected in the thermistor during operation, or an open circuit is detected in the ther-mistor after 5 minutes (in cooling) and 10 minutes (in heating) of compressor start-up.

Defrost thermistorA short circuit is detected in the thermistor during operation, or an open circuit is detected in the ther-mistor after 5 minutes of compressor start-up.

6Lighted 6 times

Zero cross detecting circuit (Outdoor control P.C. board)

Zero cross signal cannot be detected. • Replace the outdoor control P.C. board.

7 Lighted 7 times Outdoor control system The nonvolatile memory data cannot be read properly. • Replace the outdoor control P.C. board.

8 Lighted 8 times Current sensor Current sensor protection cut-out operates 2 con-secutive times. • Replace the outdoor power P.C. board.

9

Lighted 11 times

Communication errorbetween P.C. boards

The communication protection cut-out between boards operates 2 consecutive times.

• Check the connecting wire between outdoor con-trol P.C. board and outdoor power P.C. board.

M-NET communication error

M-NET adapter P.C. board detects an abnormality in the communication error.

• Check the connecting wire between M-NET adapter P.C. board and outdoor control P.C. board, or terminal block.

10Lighted 12 times

Zero cross detecting circuit (Outdoor power P.C. board)

The protection cut-out of the zero cross detecting circuit operates 10 consecutive times. • Replace the outdoor power P.C. board.

11 Lighted 13 times Current sensor A short or open circuit is detected in the input cur-rent detection circuit during operation. • Replace the outdoor power P.C. board.

12 Lighted 14 times Voltage sensor A short or open circuit is detected in the input volt-age detection circuit during operation. • Replace the outdoor power P.C. board.

13 Lighted 15 times Relay operation No relay operation is detected during operation. • Replace the outdoor power P.C. board.14 'Outdoor unit

stops and restarts 3 minutes later' is repeated.

Twice Not lightedIPM protection Overcurrent is detected after 30 seconds of com-

pressor start-up.• Reconnect compressor connector.• Refer to 11-6. "How to check inverter/ compressor". • Check the stop valve.• Check the power module (PAM module).

Lock protection Overcurrent is detected within 30 seconds of com-pressor start-up.

15

3 times Not lighted Discharge temperatureprotection

The discharge temperature exceeds 115°C (MXZ-3E54/3E68/4E72VA)/ 106°C(MXZ-4E83/5E102VA, MXZ-2E52VAHZ)/ 116°C (MXZ-4E83VAHZ) during operation. Compressor can restart i f d ischarge tem-p e r a t u r e t h e r m i s t o r r e a d s 8 0 ° C ( M X Z -3E54/3E68/4E72VA)/95°C (MXZ-4E83/5E102VA, MXZ-2E52VAHZ)/100°C (MXZ-4E83VAHZ) or less 3 minutes later.

• Check the amount of gas and refrigerant circuit.• Refer to 11-6. "Check of LEV".

16

4 times Not lighted

Fin temperatureprotection The fi n temperature exceeds during operation.

•Check refrigerant circuit and refrigerant amount.•Refer to 11-6. "Check of outdoor fan motor".P.C. board temperature

protectionThe P.C. board temperature exceeds during opera-tion.

17

5 times Not lighted High-pressure protection

High-pressure is detected with the high-pressure switch (HPS) during operation.

• Check around of gas and the refrigerant circuit.• Check the stop valve.The outdoor heat exchanger temperature exceeds

70°C during cooling or the indoor gas pipe tem-perature exceeds 70°C during heating.

18

6 times Not lighted Pre-heating protection Overcurrent is detected during pre-heating.

• Reconnect compressor connector.• Refer to 11-6. "How to check inverter/ compressor".• Check the power module.

19 8 times Not lighted Converter protection A failure is detected in the operation of the convert-er during operation. • Replace the outdoor power P.C. board.

20

9 times Not lighted Bus-bar voltageprotection

The bus-bar voltage exceeds 400 V or falls to low level during compressor operating.

• Check the voltage of power supply.• Replace the outdoor power P.C. board or the out-

door control P.C. board.• Refer to 11-6. "Check of bus-bar voltage".

21 11 times Not lighted Low outside tempera-ture protection(cooling) The ambient became -12°C or less. —

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No. SymptomIndication Abnormal point / Con-

dition Condition RemedyLED1(Red) LED2(Yellow)

22 'Outdoor unit stops and restarts 3 minutes later' is repeated.

13 times Not lighted Outdoor fan motor A failure occurs 3 consecutive times within 30 seconds after the fan gets started. • Refer to 11-6. "Check of outdoor fan motor".

23 Lighted 8 times Current sensor protec-tion

A short or open circuit is detected in the current sensor during compressor operating. • Replace the outdoor power P.C. board.

24Lighted 11 times

Communication between P.C. boards protection

Communication error occurs between the outdoor control P.C. board and outdoor power P.C. board for more than 10 seconds.

• Check the connecting wire between outdoor con-trol P.C. board and outdoor power P.C. board.

25Lighted 12 times

Zero cross detecting circuit (Outdoor power P.C. board)

Zero cross signal cannot be detected while the compressor is operating. • Replace the outdoor power P.C. board.

26 Outdoor unit operates. Once Lighted Primary current protec-

tion

The input current exceeds 13.6 A (MXZ-2E53VAHZ)/15 A (MXZ-3E54VA/3E68VA/4E72VA)/18.4 A (MXZ-4E83VA/5E102VA)/25 A (MXZ-4E83VAHZ).

These symptoms do not mean any abnormality of the product, but check the following points.

• Check if indoor fi lters are clogged.• Check if refrigerant is short.• Check if indoor/outdoor unit air circulation is short

cycled.

27

Twice Lighted

High-pressure protec-tion

The indoor gas pipe temperature exceeds 45°C during heating.

Defrosting in cooling The indoor gas pipe temperature falls 3°C or below during cooling.

28

3 times Lighted Discharge temperature protection

The frequency of the compressor is kept 80 Hz or more and the discharge temperature is kept under 50°C(COOL mode)/40°C(HEAT mode) for more than 40 minutes.

• Check refrigerant circuit and refrigerant amount.• Refer to 11-6. "Check of LEV".• Refer to 11-6. "Check of outdoor thermistors".

294 times Lighted Low discharge

temperature protection

The frequency of the compressor is kept 80 Hz or more and the discharge temperature is kept under 39°C for more than 20 minutes.

• Refer to 11-6. "Check of LEV".• Check refrigerant circuit and refrigerant amount.

30

5 times Lighted Cooling high-pressureprotection

The outdoor heat exchanger temperature exceeds 58°C during operation.

This symptom does not mean any abnormality of the product, but check the following points.

• Check if indoor fi lters are clogged. • Check if refrigerant is short.• Check if indoor/outdoor unit air circulation is short

cycled.31

7 times Lighted

High LowPressure bypass valveCooling evaporating temperature drop prevention control

During cooling operation, the temperature of indoor heat exchanger becomes 3°C or less within 1 hour after the compressor starts running, or it becomes less than 12°C - 16°C* later than that.* It depends on the difference between the set temperature and the room temperature.

This symptom does not mean any abnormality of the product, but check the following points.

• Check the indoor fi lters are not clogged.• Check there is suffi cient refrigerant.• Check the indoor/outdoor unit air circulation is not

short cycled.32

11 times Lighted M-NET communication error

M-NET adapter P.C. board detects an abnormality in the communication error.

• Check the connecting wire between M-NET adapter P.C. board and outdoor control P.C. board, or terminal block.

33 Outdoor unitoperatesnormally.

7 times Lighted

High Low pressure bypass valveHigh pressure protec-tion control at start-up of heating operation

The room temperature is 24°C or more when 1 or 2 unit(s) start(s) the heating operation.

This symptom does not mean any abnormality of the product.

High Low pressure bypass valveCompressor oil temper-ing control at start-up of heating operation

Both the following are true:• The outside temperature is -2°C or less when the heating operation is started.• [(Discharge temperature) - (Indoor heat exchang-er temperature)] < 5°C

34

8 times LightedCooling evaporating temperatureprotection

During cooling operation, the temperature of indoor heat exchanger becomes 7°C - 11°C*or less within 1 hour after the compressor starts running, or it becomes 9°C - 17°C* or less later than that.* It depends on the indoor unit type/model or the

difference between the set temperature and the room temperature.

35 9 times Lighted Inverter check mode The unit is operated with emergency operation switch. —

36 Lighted Lighted Normal — —

NOTE 1. The location of LED is illustrated at the right figure. Refer to 11-7.1. 2. LED is lighted during normal operation. The flashing frequency shows the number of times the LED blinks after every 2.5-second OFF.(Example) When the flashing frequency is “2”.

ON

OFF2.5-second OFF 2.5-second OFF

0.5-second ON 0.5-second ON

LED1 LED2

Lighted

Outdoor control P.C. board (Parts side)

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11-5. TROUBLE CRITERION OF MAIN PARTS

W

UVWHT

RED

BLK

LEV

WHT

RED

YLW

ORN

BLU

Linear expansion valve

37.4 ~ 53.9

NormalColor of lead wireWHT - REDRED - ORNYLW - REDRED - BLU

High pressure switch(HPS)

Pressure Normal

HPS3.43 ± 0.15 MPa4.41 ± 0.1 MPa Open

Close

Discharge temperaturethermistor (RT62)

Part name Check method and criterion

Measure the resistance between terminals using a tester.(Winding temperature: -10 °C ~ 40 °C)

Compressor

Outdoor fan motor

R.V. coil

Defrost thermistor (RT61)Fin temperature thermistor (RT64)Ambient temperature thermistor (RT65) Outdoor heat exchangertemperature thermistor(RT68)

Measure the resistance with a tester.

Refer to 11-7. “Test point diagram and voltage”, 1. ”Outdoor control P.C.board”, 2. ”Outdoor power P.C. board”, for the chart of thermistor.

Measure the resistance with a tester.Before measurement, hold the thermistor with your hands to warm it up.Refer to 11-7. “Test point diagram and voltage”,1. ”Outdoor control P.C. board” for the chart of thermistor.

MXZ-3E54VA MXZ-3E68/4E72VA MXZ-4E83/5E102VAMXZ-2E53VAHZ MXZ-4E83VAHZ

Normal (Each phase)

MXZ-4E83/5E102VAMXZ-2E53VAHZMXZ-3E54/3E68/4E72VA MXZ-4E83VAHZ

Normal (Each phase)

Measure the resistance using a tester. (Part temperature: -10 °C ~ 40 °C)

Measure the resistance using a tester. (Part temperature: -10 °C ~ 40 °C)


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Check of power supply

Outdoor unit does not operate.

11-6. TROUBLESHOOTING FLOW

Turn ON the power supply.

No

Yes

Yes

No

No

Yes

Check the main power supply circuit for proper connections.

Is there voltage of 230 VAC in the power supply terminal block?

Is the output voltage from the outdoor power P.C. board 325 VDC?

Check the power supply cable.

Replace the outdoor power P.C. board.

Turn OFF the power supply and recconnect the reactor.

Is the reactor short-circuited? Replace the reactor.

Replace the outdoor control P.C. board.

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Is there rated voltage in the power supply?

Is there any miswiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire?

1 Miswiring may damage indoor electronic control P.C. board during the operation. Be sure to confirm the wiring is correct before the operation starts.

(Lighted or not lighted)

No

Yes

No

Yes

Yes

No

Yes

No

Be sure to release the failure-moderecall function after checking.

No

No

Yes

No

Yes

Yes

Yes

No

Yes

Refer to indoor unit service manual.

Turn OFF the power supply.


Is there rated voltage betweenoutdoor terminal block S1 andS2?

Does the left lamp of OPERATIONINDICATOR lamp light up? <Confirmation of the power to the indoor unit>

Press EMERGENCY OPERATION switch once.

Check the powersupply.

A

Turn OFF the power supply.Check once more if the indoor/outdoorconnecting wire is not miswiring.Bridge the outdoor terminal block S2 andS3. 1

B


Check the wiring.

Correct them.

Turn OFF the power supply.Remove the bridge betweenoutdoor terminal block S2 and S3.Turn ON the power supply.Is there amplitude of 10 to 20 VDCbetween outdoor terminal block S2and S3? <Confirmation of serialsignal>

Is there rated voltage between indoor terminal block S1 and S2?<Confirmation of power voltage>

Replace the indoor electronic control P.C. board.

2 Be careful of the residual voltage of smoothing capacitor.

Replace the outdoor control P.C. board. 2

Is there any error of theindoor/outdoor connecting wire,such as the damage of the wire,intermediate connection, poorcontact to the terminal block?

Replace theindoor/outdoorconnecting wire.

Is serial signalerror indicated 6 minutes later?

Yes

No

· Turn OFF inverter-controlled lighting equipment.

· Turn OFF the power supply and then turn ON again.

· Press EMERGENCY OPERATION switch.

B

· Reinstall either the unit or the light away from each other.

· Attach a filter on remote control receiving section of the indoor unit.

A

Is serial signal error indicated 6 minutes later?

No

Does the LED on the outdoor control P.C. board repeat "3.6-second-OFF and 0.8-second-ON quick blinking"?

LED indication for communication statusCommunication status is indicated by the LED.

Blinking: normal communicationLighting: abnormal communication or not connectedPattern 1 and 2 is repeatedly displayed alternately. Each pattern is displayed for 15 seconds.NOTE: "Lighting" in the table below does not indicate abnormal communication.

Unit status


Blinking

LED1 LED2 LED3

LED 1 LED 3LED 2Pattern

1

2

3

Unit Bstatus

Unit Cstatus

Unit Astatus

Unit Dstatus

Unit Estatus

Not lighted

Lighted

Blinking

How to check miswiring and serial signal error (when outdoor unit does not work)

• When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch. Indoor unit does not operate.• When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit does not operate.

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Check of R.V. coil

The cooling operation or heating operation does not operate.

No

Yes

No

Yes

No

Yes

No

Yes

1. Disconnect the lead wire leading to the compressor.2. 3 minutes after turning ON the power supply, start EMERGENCY OPERATION in COOL mode.

Is there voltage of 230 VAC between pin1 and pin2 at connector CN712?

Turn OFF the power supply.Disconnect the connector CNAC2.

Replace the 4-way valve.

Replace the outdoorcontrol P.C. board.

Replace the R.V. coil.

Is there voltage 230 VAC between the pin1 and pin3 atconnector CNAC?


Is there normal resistance to R.V. coil? (Refer to 11-5.)

1. Disconnect the lead wire leading to the compressor.2. 3 minutes after turning ON the power supply, start EMERGENCY OPERATION in HEAT mode.

Is there voltage of 230 VAC between pin1 and pin2 at connector CN712? Replace the 4-way valve.


CNACCN712


CNAC2 Outdoor power P.C. board

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Check of LEV

No

Yes

No

Yes

Turn ON the power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely.

Is "click - click" sound heard?Or, do you feel vibration of LEV coil with your hand?

Disconnect the connectors. CN791: LEV A, CN792: LEV B, CN793: LEV C (MXZ-3E/4E/5E), CN794: LEV D (MXZ-4E/5E), CN795: LEV E (MXZ-5E)CN797: LEV R (MXZ-3E/4E72) Is there normal resistance to LEV coil?(Refer to 11-5.)

Normal


Replace LEV coil.

• When cooling, heat exchanger of non-operating indoor unit frosts.• When heating, non-operating indoor unit gets warm.

CN791CN792CN793CN794CN795

OutdoorcontrolP.C. board

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How to check inverter/compressor

• When heating, room does not get warm.• When cooling, room does not get cool.

Disconnect the terminal of the compressor or the connector (CNMC) between the compressor and the outdoor power P.C. board. 3 minutes after the power supply is turned ON, start EMERGENCY OPERATION.

Is output balanced?

Clarify the causes by counting time until the inverter stops.0 to 10 seconds: compressor layer short 10 to 60 seconds: compressor lock60 seconds to 5 minutes: refrigerant circuit defective5 minutes or more: normal

Turn OFF the power supply of indoor and outdoor unit, and measure the compressor winding resistance between the compressor terminals.Is the resistance between each terminal normal?(Refer to 11-5.)

Is the input voltage to the outdoor control P.C. board 370 V or more?

Reconnect the lead wire of compressor, and turn ON the power supply to indoor and outdoor unit. 3 minutes later, start EMERGENCY OPERATION.

Replace the compressor.


or more before measuring the voltage.

number of indoor units to be operated.

Measure the voltage between each lead wire leading to the compressor.U (BLK) - V (WHT) V (WHT) - W (RED) W (RED) - U (BLK) Output voltage: Is proper output voltage detected?

No

No

Yes

Yes

Yes

No

Yes

No

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Check of outdoor thermistors

• When thermistor is abnormal.

ThermistorDefrostDischarge temperatureOutdoor heat exchanger temperature Ambient temperatureFin temperature

SymbolRT61RT62RT68RT65RT64

Connector, Pin No.Between CNTH1 pin1 and pin2Between CNTH1 pin3 and pin4Between CNTH1 pin7 and pin8Between CNTH2 pin1 and pin2Between CN171 pin1 and pin2


Outdoor power P.C. board

Board

Normal

Yes

No

AbnormalDisconnect the connector in the following table and measure the resistance of the thermistor to check whether the thermistor is normal or not. (Refer to 11-7.)

Does the unit operate 10 minutes or more without showing thermistor abnormality?

Replace the thermistor.

Normal

Replace the outdoor control P.C. board or the outdoor power P.C. board.

Reconnect the connector in the following table and disconnect the lead wire leading to the compressor. 3 minutes after turning ON the power supply, start EMERGENCY OPERATION.

(MXZ-4E83VA/5E102VA/2E53VAHZ)

(MXZ-3E54VA/3E68VA/4E72VA/4E83VAHZ)Replace the thermistor except RT64.If RT64 is abnormal, replace the outdoor powerP.C. board since RT64 is combined with this board.

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No

Yes

No

Yes

No

Yes

No

Yes

No

Yes

Disconnect CNF1 and measure the resistance of the outdoor fan motor.

Is the resistance of outdoor fan motor normal? (Refer to right table.)

Turn on the power supply to start operation and measure the voltage of connector CNF1.

Turn OFF the power supply and connect the connector CNF1.Turn ON the power supply and measure the voltage of connector CNF1 while rotating the motor by the hand.

Does the outdoor fan motor rotate smoothly?

Replace the outdoor fan motor. ResistanceMeasuring points

* To measure the resistance, connect the negative (-) end of the tester to pin4.

* To measure the voltage, connect the negative (-) end of the tester to pin4.* Voltage between pin4 and pin6 should be measured within 1 minute after the operation starts.

pin1 - pin4pin5 - pin4pin6 - pin4pin7 - pin4

Voltage

15 VDC325 VDC

1 - 5 VDC

CNF1pin1 - pin4pin5 - pin4pin6 - pin4

Is the voltage of connector CNF1normal? (Refer to right table.)

Does the voltage between pin7 and pin4 of connector CNF1 repeat 0 V and 5 V? Replace the outdoor fan motor.

Does the fan motor operate for about 5 seconds? Replace the outdoor fan motor.

Replace the outdoor fan motor.

Start operation.



Check of outdoor fan motor

• Fan motor does not operate or stops operating shortly after starting the operation.

CNF1 Outdoor controlP.C. board

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83

The other cases

• When the operation frequency does not go up from the lowest frequency.

Check of bus-bar voltage

•Check the voltage of power supply. •Confi rm outdoor unit failure mode recall function. (Refer to 11-2.2.)

Blink 5 times

Confi rm LED1 indication lamp on the outdoor control P.C. board.


Blink 9 times


Turn OFF power supply before removing P.C. board.


Turn ON power supply. Start operation.

Lighting


Blink 9 times



Turn ON power supply. Start operation.

NormalLighting Lighting

Check of HPS

Infinity

No

Yes

1. Disconnect the connector CN63H in the outdoor control P.C. board.2. Check the resistance of HPS after 1 minute has passed since the outdoor unit power supply was turned OFF.

Check the resistance between each terminal.

Reconnect CN63H.Turn ON the power supply to the indoor and outdoor unit.3 minutes later, start EMERGENCY OPERATION.

Is HPS protection displayed immediately after compressor starts?

Replace HPS.


Normal

CN63H Outdoor control P.C. board

Indoor unit does not operate. (different operating models in multi system)• When you try to run 2 indoor units simultaneously, one for cooling and the other for heating, the unit which transmits signal to the outdoor units fi rst decides the operation mode.

• When the above situation occurs, set all the indoor units to the same mode, turn OFF the indoor units, and then turn them back ON.

• Though the top of the indoor unit sometimes gets warm, this does not mean malfunction. The reason is that the refrigerant gas continuously fl ows into the indoor unit even while it is not operating.

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CN601

230 VDCRoom A

Input

Room BRoom C

Room D

CN930To fan motor

Defrost thermistor (RT61)


Outdoor heat exchangertemperature thermistor (RT68)

CNTH1

CNTH2Ambient temperature thermistor (RT65)

SW1

LED3

LEV: 12 VDC pulse wave

LED2LED1

SW2

SW871

CN712 R.V. coil230 VACOutput

CN713 Valve coil230 VACOutputMXZ-4E83VAHZ

CN714 Defrost heater230 VACOutput

CNAC to outdoor power P.C.board 230 VACInput

F711 FUSET3.15AL250V

CN611

Serial signal 12 ~ 24 V

CN621

CN741Signal translation(To Communication adaptor board)

CN

791

LEV

Roo

m A

(CN792 LEV

Roo

m B

CN

794

LEV

Roo

m D

CN

797

LEV

Rex

cept

MXZ

-4E8

3VA

HZ

(-)

CN

701

Sig

nal

trans

mis

sion

(To

pow

er b

oard

)5

VD

C p

ulse

wav

e

CN

702

Sig

nal

trans

mis

sion

(To

pow

er b

oard

)5

VD

C p

ulse

wav

e

CN

793

LEV

Roo

m C

(+)

(+)

(-)

(-)

15 V* V (-

)

CN63HHigh pressure switch

CNDCBus-bur voltage290 ~ 370 VDC

Bus-bur voltage290 ~ 370 VDC

18 VDCRotate instruction (Constant voltage)

Rotate signal (Pulse wave)

)* V 15

V: M

XZ-3

E54V

A

MXZ

-3E6

8VA

M

XZ-4

E72V

A18

V: M

XZ-4

E83V

AH

Z

0

100

200

300

400

500

600

700

800

0 10 20 30 40 50 60 70 80 90 100 110 120Temperature( )

Discharge temperature thermistor (RT62)

Res

ista

nce(

k )

Thermistor R100 = 13.36 k ± 2%B constant = 4014 ± 2%Rt = 13.36exp{4014( )}273+t

13731

-20 -10 0 10 20 30 40 (ºC)

100

90

80

70

60

50

40

30

20

10

0

Temperature

273+t1

2981

Thermistor R25 = 10 k ± 2%B constant = 3950 ± 2%

Rt = 10exp{3950( )}

Defrost thermistor (RT61)Ambient temperature thermistor (RT65)Outdoor heat exchanger temperature thermistor (RT68)

MXZ-3E54VA MXZ-3E68VAMXZ-4E72VA MXZ-4E83VAHZ

11-7. TEST POINT DIAGRAM AND VOLTAGE1. Outdoor control P.C. board

OBH723B

85

CN601

230 VDC Room AInput

Room B Room C Room D Room E

CN930To fan motor

Defrost thermistor (RT61)


Outdoor heat exchangertemperature thermistor (RT68)

CNTH1

CNTH2Ambient temperature thermistor (RT65)

SW1

LED3

LEV: 12 VDC pulse wave

LED2LED1

SW2

SW871

CN712 R.V. coil230 VACOutput

CNAC to outdoor power P.C.board 230 VACInput

F711 FUSET3.15AL250V

CN611

Serial signal 12 ~ 24 V

CN621CN741Signal translation(To Communication adaptor board)

CN

791

LEV

Roo

m A

(CN792 LE

V R

oom

B

CN

794

LEV

Roo

m D

CN

795

LEV

Roo

m E(-

)C

N70

1 S

igna

l tra

nsm

issi

on(T

o po

wer

boa

rd)

5 V

DC

pul

se w

ave

CN

702

Sig

nal

trans

mis

sion

(To

pow

er b

oard

)5

VD

C p

ulse

wav

e

CN

793

LEV

Roo

m C(+

)

(+)

(-)

(-)

15 V (-

)

CN63HHigh pressure switch

CNDCBus-bur voltage290 ~ 370 VDC

Bus-bur voltage290 ~ 370 VDC

15 VDCRotate instruction (Constant voltage)

Rotate signal (Pulse wave)

)15

V

CN714 Defrost heater230 VACOutput

0

100

200

300

400

500

600

700

800

0 10 20 30 40 50 60 70 80 90 100 110 120Temperature( )

Discharge temperature thermistor (RT62)

Res

ista

nce(

k )

Thermistor R100 = 13.36 k ± 2%B constant = 4014 ± 2%Rt = 13.36exp{4014( )}273+t

1373

1

-20 -10 0 10 20 30 40 (ºC)

100

90

80

70

60

50

40

30

20

10

0

Temperature

273+t1

2981


Rt = 10exp{3950( )}

Defrost thermistor (RT61)Ambient temperature thermistor (RT65)Outdoor heat exchanger temperature thermistor (RT68)

MXZ-4E83VAMXZ-5E102VA MXZ-2E53VAHZ

OBH723B

86

2. Outdoor power P.C. board

200

180

160

140

120

100

80

60

40

20

0

Temperature

Fin temperature thermistor (RT64)


273+t1

3231

0 10 20 30 40 50 60 70 80

MXZ-3E54VA MXZ-3E68VA MXZ-4E72VA

Output to drive compressor

Connect to earthConnect to reactor(Red line)

Connect to reactor(White line)

CNDCBus-bur voltage290 - 370 VDC

CNAC1230 VAC Output

F2 FUSET6.3AL250V

F1 FUSET6.3AL250V

230 VAC Input

CNAC2230 VAC Output

Connect to earth

CN152Signal Transmission(From Outdoor Control P.C. board)5 VDC pulse wave

(-)(+)

CN171Fin temperature thermistor(RT64)

CN

151

Sig

nal t

rans

mis

sion

(To

Out

door

con

trol

P.C

. boa

rd)

5 V

DC

pul

se w

ave

(+)

(-)

(-)

15

V

15

V

OBH723B

87

2. Outdoor power P.C. board

200

180

160

140

120

100

80

60

40

20

0

Temperature



273+t1

3231

0 10 20 30 40 50 60 70 80


Connect to earthConnect to reactor(Red line)


CNDCBus-bur voltage290 - 370 VDC

CNAC1230 VAC Output

F2 FUSET6.3AL250V

F1 FUSET6.3AL250V

230 VAC Input

CNAC2230 VAC Output

Connect to earth


(-)(+)

CN171Fin temperature thermistor(RT64)

CN

151

Sig

nal t

rans

mis

sion

(To

Out

door

con

trol

P.C

. boa

rd)

5 V

DC

pul

se w

ave

(+)

(-)

(-)

15 V

15 V

MXZ-4E83VA MXZ-5E102VA MXZ-2E53VAHZ

OBH723B

88

MXZ-4E83VAHZ

200

180

160

140

120

100

80

60

40

20

0

Temperature



273+t1

3231

0 10 20 30 40 50 60 70 80



CNDCBus-bur voltage290 - 370 VDCCN171

Fin temperature thermistor(RT64)

230 VAC InputCNAC2230 VAC Output

CNAC1230 V Output

Connect to earth

Connect to earth

Connect to earth

Connect to reactor(Red line)

F2 FUSET6.3AL250V

F1 FUSET6.3AL250V


(-)(+)

CN

151

Sig

nal t

rans

mis

sion

(To

Out

door

con

trol

P.C

. boa

rd)

5 V

DC

pul

se w

ave

(+)

(-)

(-)

15 V

15 V

18 V

OBH723B

OPERATING PROCEDURE PHOTOS1. Removing the cabinet and the panels

(1) Remove the screws of the service panel, and remove the service panel.

(2) Disconnect the power supply and indoor/outdoor connect-ing wire.

(3) Remove the screws of the top panel, and remove the top panel.

(4) Remove the screws of the cabinet, and remove the cabi-net.

(5) Remove the screws of the back panel, and remove the back panel (Photo 3).

89

DISASSEMBLY INSTRUCTIONS12

(1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the locking mechanism.

Slide the sleeve. Pull the terminal while pushing the locking lever.

Hold the sleeve, and pull out the terminal slowly.

The terminal which has the locking mechanism can be detached as shown below.There are 2 types ( Refer to (1) and (2)) of the terminal with locking mechanism.The terminal without locking mechanism can be detached by pulling it out.Check the shape of the terminal before detaching.

<"Terminal with locking mechanism" Detaching points>

Connector

Sleeve

Locking lever

12-1. MXZ-3E54VA MXZ-3E68VA MXZ-4E72VANOTE: Turn OFF the power supply before disassembly.

Photo 2

Photo 1

Screws of the cabinet

Screws of the top panel

Screws of the cabinetScrews of service panel




Screws of thesub panel

Photo 3Screw of the rear guard

Screws of theback panel

Screws of the back panel

Screws ofthe back panel

OBH723B

OPERATING PROCEDURE PHOTOS2. Removing the outdoor control P.C. board, the out-

door power P.C. board and the reactor(1) Remove the service panel (Photo 1).(2) Disconnect the power supply and indoor/outdoor con-

necting wire.(3) Remove the top panel, the cabinet, and the back panel

(Photo 1, 2, 3).(4) Disconnect all connectors and lead wires on the outdoor

control P.C. board.(5) Unhook the catches of the outdoor control P.C. board,

and remove the outdoor control P.C. board.(6) Remove the screws of the electrical box assembly,

unhook the catches of the electrical box assembly, and remove the electrical box assembly.

(7) Remove the screws of outdoor control P.C. board holder, and remove the outdoor control P.C. board holder.

(8) Remove the screws of the reactor, and remove the reac-tor.

(9) Remove the screws of the reactor bed, and remove the reactor bed.

(10) Remove the screws of the heat sink support, and remove the heat sink support.

(11) Remove the screws fixing the outdoor power P.C. board.(12) Disconnect all connectors and lead wires on the outdoor

power P.C. board.

90

Photo 4

Screws of the electrical box assembly

Electrical box assembly Catch of the electrical

box assembly

Catches of the outdoor control P.C. board

Photo 5

Screws of the outdoor control P.C. board holder


Photo 6

Photo 7

Screws of the reactor

Screws of the outdoor power P.C. board

Heat sink support

Screw of the heat sink support

Screws of the reactor bed

Screw of the reactor bed

OBH723B

OPERATING PROCEDURE PHOTOS3. Removing the fan motor

(1) Remove the service panel (Photo 1).(2) Disconnect the power supply and indoor/outdoor connect-

ing wire.(3) Remove the top panel, the cabinet, and the back panel

(Photo 1, 2, 3).(4) Disconnect connectors CN712, CNF1, CNTH1, CNTH2,

CN63H, CN791, CN792, CN793, CN794 (MXZ-4E72VA), CN797 on the outdoor control P.C. board and disconnect the relay connector of the compressor lead wire.

(5) Remove the screws of the electrical box assembly, and remove the electrical box assembly (Photo 4).

(6) Remove the propeller fan.(7) Remove the fan motor.

Photo 8

4. Removing the compressor and the 4-way valve(1) Remove the service panel (Photo 1).(2) Disconnect the power supply and indoor/outdoor connect-

ing wire.(3) Remove the top panel, the cabinet, and the back panel

(Photo 1, 2, 3).(4) Recover gas from the refrigerant circuit.

NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm2 (0 MPa).

(5) Disconnect the outdoor control P.C. board connectors: CNF1, CNTH1, CNTH2, CN63H, CN791,CN792, CN793,

CN794 (MXZ-4E72VA), CN797, CN712.(6) Disconnect the compressor lead wire from the terminal of the compressor (U, V, W).(7) Remove the screws of the electrical box assembly, and

remove the electrical box assembly (Photo 4).(8) Remove the propeller fan.(9) Remove the sound proof felt *1, *2 and *3 (MXZ-3E54VA).(10) Remove the screws of the separator, and remove the

separator.(11) Detach the brazed parts of the compressor suction and

discharge pipes.(12) Remove the compressor nuts and remove the compres-

sor.(13) Detach the brazed parts of the 4-way valve and pipe.

Sound proof felt *2

91

Photo 9R.V. coil 4-way valve

LEV coil R

Expansion valve R

Suction pipebrazed part

Discharge pipe brazed part

Compressor nuts

4-way valve

R.V. coil

Photo 10

Brazed parts

Screws of the outdoor fan motor

Propeller fan Propeller fan nut

Separator Sound proof felt *1

Sound proof felt *3(MXZ-3E54VA)

OBH723B

OPERATING PROCEDURE PHOTOS5. Removing the expansion valve

(1) Remove the service panel (Photo 1).(2) Remove the top panel, the cabinet, and the back panel

(Photo 1, 2, 3). (Gas recovery is not required if the unit is pumped down.)(3) Remove the electrical parts for removing LEV R (Photo 4, 8).(4) Remove the LEV coils.(5) Detach the brazed parts of expansion valves and pipes.

92

Expansion valves

Photo 11

LEV coils

OBH723B

OPERATING PROCEDURE PHOTOS1. Removing the panels

(1) Remove the screws fixing the service panel, and remove the service panel.

(2) Remove the screws fixing the top panel and remove the top panel.

(3) Remove the screws fixing the handle (R Rear), and remove the handle (R Rear).


(5) Remove the screws fixing the front panel, and remove the front panel.

(6) Remove the screws fixing the back panel, and remove the back panel.

93

12-2. MXZ-4E83VA MXZ-5E102VANOTE: Turn OFF the power supply before disassembly.

Photo 1

Photo 3

Photo 4

Screws of the service panel

Screws of the front panel

Screws of the handle (R Rear)

Catch of the front panelCatch of the front panel


Screws of the front panelScrews of the top panel


Remove the handle (R Rear).

Photo 2

Handle (R Rear)

OBH723B

OPERATING PROCEDURE PHOTOS2. Removing the outdoor control P.C. board, the reac-

tor and the outdoor power P.C. board(1) Remove the service panel and the top panel (Refer to 1).(2) Disconnect the power supply and indoor/outdoor connect-

ing wire.(3) Disconnect the connectors on the outdoor control P.C.

board. (4) Remove the screws fixing the outdoor control P.C. board

holder, and remove the outdoor control P.C. board.(5) Disconnect the lead wire from the reactor.(6) Remove the screws fixing the reactor, and remove the

reactor.(7) Disconnect the lead wire of the power P.C. board.(8) Disconnect the catches of the PB cover, and remove the

PB cover.(9) Remove the outdoor power P.C. board.

94

Photo 5Catches of the PB cover

Photo 6



Photo 7 Screws of the electrical parts

OBH723B


(1) Remove the service panel, the top panel and the front panel (Refer to 1).


(3) Disconnect the connector CNF1 on the outdoor control P.C. board.


4. Removing the expansion valve(1) Remove the service panel and the top panel (Refer to 1).(2) Disconnect the power supply and indoor/outdoor connect-

ing wire. (Gas recovery is not required if the unit is pumped down.)(3) Remove the LEV coils.(4) Detach the brazed parts of the expansion valves and

pipes.

95

Photo 9

Photo 8Propeller fan


Expansion valves

LEV coilsSoundpfoof felt

OBH723B

OPERATING PROCEDURE PHOTOS5. Removing the compressor and 4-way valve

(1) Remove the service panel, the top panel, the handle (R Rear), the back panel and the front panel (Refer to 1).

(2) Disconnect the power supply and indoor/outdoor connect-ing wire, and remove the back panel.

(3) Recover gas from the refrigerant circuit.NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm2 (0 MPa).

(4) Disconnect the compressor lead wire from the terminal of the compressor (U, V, W).(5) Disconnect the outdoor control P.C. board connectors: CNF1, CNTH1, CNTH2, CN63H, CN712, CN791, CN792, CN793, CN794, CN795 (MXZ-5E)(6) Remove the screws fixing the electrical parts, and remove

the electrical parts (Photo 5).(7) Remove the propeller fan.(8) Remove the screws fixing the separator, and remove the separator.(9) Remove the soundproof felt.(10) Detach the brazed parts of the compressor suction pipe

and discharge pipe.(11) Remove the compressor nuts and remove the compressor.(12) Detach the brazed parts of 4-way valve and pipes.

96

Photo 11

Suction pipe brazed part

Compressor nuts


4-way valve

R.V. coil

Brazed parts of 4-way valve and pipes

Photo 10

OBH723B



(2) Remove the screws fixing the top panel and remove the top panel.

(3) Remove the screws fixing the handle (R Rear), and remove the handle (R Rear).




97

12-3. MXZ-2E53VAHZNOTE: Turn OFF the power supply before disassembly.

Photo 1

Photo 3

Photo 4

Screws of the service panel


Screws of the handle (R Rear)

Catch of the front panelCatch of the front panel





Remove the handle (R Rear).

Photo 2

Handle (R Rear)

OBH723B


tor and the outdoor power P.C. board(1) Remove the service panel and the top panel (Refer to 1).(2) Disconnect the power supply and indoor/outdoor connect-

ing wire.(3) Disconnect the connectors on the outdoor control P.C.

board. (4) Remove the screws fixing the outdoor control P.C. board

holder, and remove the outdoor control P.C. board.(5) Disconnect the lead wire from the reactor.(6) Remove the screws fixing the reactor, and remove the

reactor.(7) Disconnect the lead wire of the power P.C. board.(8) Disconnect the catches of the PB cover, and remove the

PB cover.(9) Remove the outdoor power P.C. board.

98

Photo 5Catches of the PB cover

Photo 6



Photo 7

Screws of the electrical parts

OBH723B







ing wire. (Gas recovery is not required if the unit is pumped down.)(3) Remove the LEV coils.(4) Detach the brazed parts of the expansion valves and

pipes.

5. Removing the defrost heater(1) Remove the service panel, the top panel and the front

panel (Refer to 1.).(2) Disconnect the power supply and indoor/outdoor connect-

ing wire.(3) Disconnect the defrost heater lead wires from CN714 on

the outdoor control P.C. board.(4) Remove the defrost heater lead wires from the lead

clamp.(5) Remove the screws of the defrost heater.(6) Remove the heater protector and the defrost heater.

99

Photo 9

Photo 8Propeller fan

Heater protector


Screws of the defrost heater

Expansion coils

LEV valves

Soundpfoof felt

Screw of the electrical parts

OBH723B


(1) Remove the service panel, the top panel, the handle (R Rear), the back panel and the front panel (Refer to 1).


(3) Recover gas from the refrigerant circuit.NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm2 (0 MPa).

(4) Disconnect the compressor lead wire from the terminal of the compressor (U, V, W).(5) Disconnect the outdoor control P.C. board connectors: CNF1, CNTH1, CNTH2, CN63H, CN712, CN791, CN792(6) Remove the screws fixing the electrical parts, and remove

the electrical parts (Photo 5).(7) Remove the propeller fan.(8) Remove the screws fixing the separator, and remove the separator.(9) Remove the soundproof felt.(10) Detach the brazed parts of the compressor suction pipe

and discharge pipe.(11) Remove the compressor nuts and remove the compressor.(12) Detach the brazed parts of 4-way valve and pipes.

100

Photo 11


Compressor nuts


4-way valve

R.V. coil

Brazed parts of 4-way valve and pipes

Photo 10

OBH723B

12-4. MXZ-4E83VAHZNOTE: Turn OFF the power supply before disassembly.



(2) Remove the screws fixing the top panel, remove the top panel.




101

Photo 1

Screws of the service panelScrews of the front panel




Photo 2

Photo 3


OBH723B


tor and the outdoor power P.C. board(1) Remove the service panel, the top panel and the front

panel (Refer to 1).(2) Disconnect the power supply and indoor/outdoor connect-

ing wire.(3) Disconnect the connectors on the outdoor control P.C. board.(4) Remove the screws fixing the outdoor control P.C. board,

and remove the outdoor control P.C. board.(5) Remove the screws fixing the electrical parts, and remove

the electrical parts.(6) Remove the screws fixing the TB support, and remove the

TB support.(7) Remove the screws fixing the control box separator, and

remove the control box separator.(8) Disconnect the lead wire of the outdoor power P.C. board. (9) Remove the screws fixing the outdoor power P.C. board,

and remove the outdoor power P.C. board with the out-door P.C. board holder.

(10) Remove the screws fixing the control box F, and remove the control box F.

(11) Remove the screws fixing the reactors, and remove the reactors.

102

Photo 4

Screws of the electrical parts

Photo 5

Screws of the outdoor control P.C. board

Photo 6

Screws of the outdoor power P.C. board

Screws of the control box separator

Screws of the TB supportScrews of the control box F

Photo 7

Photo 8


Screw of the electrical parts

OBH723B







ing wire. (Gas recovery is not required if the unit is pumped down.)(3) Remove the LEV coils.(4) Detach the brazed parts of expansion valves and pipes.

5. Removing the defrost heater(1) Remove the service panel, the top panel and the front

panel (Refer to 1.).(2) Disconnect the power supply and indoor/outdoor connect-

ing wire.(3) Disconnect the defrost heater lead wires from CN714 on

the outdoor control P.C. board.(4) Remove the defrost heater lead wires from the lead

clamp.(5) Remove the screws of the defrost heater.(6) Remove the heater protector and the defrost heater.

103

Photo 10

Photo 9

Propeller fan

Separator



Screws of the VB fixture

LEV valves

Expansion coils

Soundpfoof felt

Heater protector



OBH723B


(1) Remove the service panel, the top panel, the back panel and the front panel (Refer to 1).


(3) Recover gas from the refrigerant circuit.NOTE: Recover gas from the pipes until the pressure gauge

shows 0 kg/cm2 (0 MPa).(5) Disconnect the compressor lead wire from the terminal of

the compressor (U, V, W).(6) Disconnect the outdoor control P.C. board connectors: CNF1, CNTH1, CNTH2, CN63H, CN712, CN713, CN714,

CN791, CN792, CN793, CN794(7) Remove the screws fixing the electrical parts, and remove

the electrical parts (Photo 4).(8) Remove the propeller fan.(9) Remove the screws fixing the VB fixture, and remove the

VB fixture.(10) Remove the screws fixing the separator, and remove the

separator.NOTE: When installing the separator, insert the tabs of the

heat exchanger into the separator.(11) Remove the soundproof felt.(12) Detach the brazed parts of the suction pipe and dis-

charge pipe.(13) Remove the nuts of the compressor, and remove the

compressor.(14) Detach the brazed parts of 4-way valve and pipes.

104

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

© Copyright 2015 MITSUBISHI ELECTRIC CORPORATIONDistributed in Nov. 2015. No.OBH723 REVISED EDITION-BDistributed in Sep. 2015. No.OBH723 REVISED EDITION-ADistributed in Apr. 2015. No.OBH723 Made in Japan

New publication, effective Nov. 2015Specifications are subject to change without notice.

4-way valve R.V. coil Brazed parts of 4-way valve and pipes

Photo 11

Photo 12


Compressor nuts


OBH723B

outdoor unit · 2019-02-06 · refrigerant piping length (one way, 4 unit total) calculation : xg =...

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