Mitsubishi MXZ-3E54VA-ET1, MXZ-4E72VA-E1, MXZ-3E54VA-ER1, MXZ-3E68VA-ER1, MXZ-3E68VA-E1 Service Manual

HFC

utilized

R410A

SERVICE MANUAL

No. OBH723

REVISED EDITION-D

OUTDOOR UNIT

NOTE:

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

PARTS CATALOG (OBB723)

Models

MXZ-3E54VA

-

E1,

ET1, ER1

MXZ-3E68VA

-

E1,

ET1, ER1

MXZ-4E72VA

-

E1,

ET1, ER1

MXZ-4E83VA

-

E1, E2, E3,

ET1, ET2, ET3, ER1, ER2

MXZ-5E102VA

-

E1, E2, E3,

ET1, ET2, ET3, ER1, ER2

MXZ-2E53VAHZ

-

E1,

ER1

MXZ-4E83VAHZ

-

E1, E2,

ER1, ER2

Indoor unit service manual
MSZ-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)

CONTENTS

1. TECHNICAL CHANGES ···································3

2. PART NAMES AND FUNCTIONS ·····················4

3. SPECIFICATION ················································5

4. NOISE CRITERIA CURVES ····························12

5. OUTLINES AND DIMENSIONS ······················14

6. WIRING DIAGRAM ··········································20

7. REFRIGERANT SYSTEM DIAGRAM ·············44

8. PERFORMANCE CURVES ·····························52

9. ACTUATOR CONTROL ···································82

10. SERVICE FUNCTIONS ····································83

11. TROUBLESHOOTING ·····································86

12. DISASSEMBLY INSTRUCTIONS ··················108

INDOOR UNITS COMBINATION SHEETS

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

OBH723 REVISED EDITION-C is void.

Revision D:

• MXZ-4E83VA- E3,

ET3, ER2

, MXZ-5E102VA-

E3, ET3, ER2

and MXZ-4E83VAHZ- E2,

ER2

have been added.

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 specif ed refrigerant only

Never 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.

Revision C:

• MXZ-3E54VA-

ER1

, MXZ-3E68VA-

ER1

, MXZ-4E72VA-

ER1

, MXZ-4E83VA- E2,

ET2, ER1

, MXZ-5E102VA- E2,

ET2, ER1

,

MXZ-2E53VAHZ-

ER1

and MXZ-4E83VAHZ-

ER1

have been added.

Revision D:

• MXZ-4E83VA- E3,

ET3, ER2

, MXZ-5E102VA- E3,

ET3, ER2

and MXZ-4E83VAHZ- E2,

ER2

have been added.

OBH723D

3

TECHNICAL CHANGES

1

MXZ-4E83VA -E1,

ET1, ER1

MXZ-5E102VA -E1,

ET1, ER1

1. New model

MXZ-2E53VAHZ -E1,

ER1

1. New model

MXZ-4E83VAHZ -E1,

ER1

1. New model

MXZ-3E54VA -E1,

ET1, ER1

MXZ-3E68VA -E1,

ET1, ER1

MXZ-4E72VA -E1,

ET1, ER1

1. New model

MXZ-4E83VA -E1,

ET1

MXZ-4E83VA -

E2, ET2

1. Fan motor has been changed.

2. Outdoor control P.C. board has been changed.

MXZ-5E102VA -E1,

ET1

MXZ-5E102VA -

E2, ET2

1. Fan motor has been changed.

2. Outdoor control P.C. board has been changed.

MXZ-4E83VA -

ER1

MXZ-4E83VA -

ER2

1. Outdoor control P.C. board has been changed.

MXZ-4E83VA -E2,

ET2

MXZ-4E83VA -

E3, ET3

1. Outdoor control P.C. board has been changed.

MXZ-5E102VA -

ER1

MXZ-5E102VA -

ER2

1. Outdoor control P.C. board has been changed.

MXZ-5E102VA -E2,

ET2

MXZ-5E102VA -

E3, ET3

1. Outdoor control P.C. board has been changed.

MXZ-4E83VAHZ -E1,

ER1

MXZ-4E83VAHZ -

E2, ER2

1. Outdoor control P.C. board has been changed.

OBH723D

4

PART NAMES AND FUNCTIONS

2

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

Air outlet

Drain outlet

Air inlet

(Back and side)

ACCESSORIES

Model

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

MXZ-4E83VA
MXZ-5E102VA

Drain socket 1 1

Drain cap 2 5

Air outlet

Drain outlet

Air inlet

(Back and side)

MXZ-4E83VAHZ

Air outlet

Drain outlet

Air inlet

(Back and side)

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

OBH723D

5

SPECIFICATION

3

Outdoor model MXZ-3E54VA

Outdoor unit power supply

Single phase
230 V, 50 Hz

System

Indoor units number 2 to 3

Piping total length m Max. 50

Connecting pipe length m Max. 25

Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Function Cooling Heating

Capacity Rated frequency (Min.-Max.)

2 kW 5.4 (2.9 - 6.8) 7.0 (2.6 - 9.0)

Breaker capacity A 25

Electrical

data

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% 99

Starting current (Total)

1, 2 A 7.0

Coeff cient of performance (C.O.P) (Total)

1, 2 4.00 4.40

Compressor

Model SNB130FGBH1T

Output W 1,400

Current

1, 2 A 5.72 6.62

Refrigeration oil (Model) L 0.7 (NEO22)

Fan

motor

Model SIC-71FW-F764-2

Current

1, 2 A 0.2

Dimensions W x H x D mm 840 x 710 x 330

Weight kg 58

Special

remarks

Air f ow (Rated) m3 /h 2,334 2,376

Sound level (Rated) dB(A) 50 53

Fan speed (Rated) rpm 650 660

Refrigerant f lling capacity (R410A) kg 2.7

1 Measured under rated operating frequency.

2 When connected with indoor units below.
MSZ-EF18VE + MSZ-EF18VE + MSZ-EF18VE
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 °C
HEATING INDOOR Dry-bulb temperature 20.0 °C
OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C

OBH723D

6

Outdoor model MXZ-3E68VA

Outdoor unit power supply

Single phase
230 V, 50 Hz

System

Indoor units number 2 to 3

Piping total length m Max. 60

Connecting pipe length m Max. 25

Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Function Cooling Heating

Capacity Rated frequency (Min.-Max.)

2 kW 6.8 (2.9 - 8.4) 8.6 (2.6 - 10.6)

Breaker capacity A 25

Electrical

data

Power input (Total) 1, 2 W 2,190 2,380

Running current (Total)

1, 2 A 9.6 10.5

Power factor (Total)

1, 2% 99

Starting current (Total)

1, 2 A 10.5

Coeff cient of performance (C.O.P) (Total)

1, 2 3.11 3.61

Compressor

Model SNB172FEGH1T

Output W 1,800

Current

1, 2 A 9.22 10.12

Refrigeration oil (Model) L 0.7 (NEO22)

Fan

motor

Model SIC-71FW-F764-2

Current

1, 2 A 0.2

Dimensions W x H x D mm 840 x 710 x 330

Weight kg 58

Special

remarks

Air f ow (Rated) m3 /h 2,334 2,376

Sound level (Rated) dB(A) 50 53

Fan speed (Rated) rpm 650 660

Refrigerant f lling capacity (R410A) kg 2.7

1 Measured under rated operating frequency.

2 When connected with indoor units below.
MSZ-EF18VE + MSZ-EF25VE + 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 °C
HEATING INDOOR Dry-bulb temperature 20.0 °C
OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C

OBH723D

7

Outdoor model MXZ-4E72VA

Outdoor unit power supply

Single phase
230 V, 50 Hz

System

Indoor units number 2 to 4

Piping total length m Max. 60

Connecting pipe length m Max. 25

Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Function Cooling Heating

Capacity Rated frequency (Min.-Max.)

2 kW 7.2 (3.7 - 8.8) 8.6 (3.4 - 10.7)

Breaker capacity A 25

Electrical

data

Power input (Total) 1, 2 W 2,250 2,280

Running current (Total)

1, 2 A 9.9 10.0

Power factor (Total)

1, 2% 99

Starting current (Total)

1, 2 A 10.0

Coeff cient of performance (C.O.P) (Total)

1, 2 3.20 3.77

Compressor

Model SNB172FEGH1T

Output W 2,000

Current

1, 2 A 9.46 9.56

Refrigeration oil (Model) L 0.7 (NEO22)

Fan

motor

Model SIC-71FW-F764-2

Current

1, 2 A 0.2

Dimensions W x H x D mm 840 x 710 x 330

Weight kg 59

Special

remarks

Air f ow (Rated) m3 /h 2,334 2,376

Sound level (Rated) dB(A) 50 53

Fan speed (Rated) rpm 650 660

Refrigerant f lling capacity (R410A) kg 2.7

1 Measured under rated operating frequency.

2 When connected with indoor units below.
MSZ-EF18VE + MSZ-EF18VE + MSZ-EF18VE + MSZ-EF18VE
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 °C
HEATING INDOOR Dry-bulb temperature 20.0 °C
OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C

OBH723D

8

Outdoor model MXZ-4E83VA

Outdoor unit power supply

Single phase
230 V, 50 Hz

System

Indoor units number 2 to 4

Piping total length m Max. 70

Connecting pipe length m Max. 25

Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Function Cooling Heating

Capacity Rated frequency (Min.-Max.)

2 kW 8.3 (3.7 - 9.2) 9.3 (3.4 - 11.6)

Breaker capacity A 25

Electrical

data

Power input (Total) 1, 2 W 2,440 2,000

Running current (Total)

1, 2 A 10.7 8.8

Power factor (Total)

1, 2% 99

Starting current (Total)

1, 2 A 10.7

Coeff cient of performance (C.O.P) (Total)

1, 2 3.40 4.65

Compressor

Model SNB220FAGMC

Output W 2,200

Current

1, 2 A 10.1 8.1

Refrigeration oil (Model) L 0.7 (FV50S)

Fan

motor

Model

E1

,

ET1

: SIC-81FW-D888-9

E2

,

ET2

,

ER1

, E3,

ET3

,

ER2

: SIC-88FWJ-D888-1

Current

1, 2 A 0.3

Dimensions W x H x D mm 950 x 796 x 330

Weight kg

E1

,

ET1

: 62 / E2,

ET2

,

ER1

, E3,

ET3

,

ER2

: 63

Special

remarks

Air f ow (Rated) m3 /h 3,336 3,336

Sound level (Rated) dB(A) 49 51

Fan speed (Rated) rpm 620 620

Refrigerant f lling capacity (R410A) kg 2.99

1 Measured under rated operating frequency.

2 When connected with below indoor units.
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°C
HEATING INDOOR Dry-bulb temperature 20.0°C
OUTDOOR Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C

OBH723D

9

Outdoor model MXZ-5E102VA

Outdoor unit power supply

Single phase

230 V, 50 Hz

System

Indoor units number 2 to 5

Piping total length m Max. 80

Connecting pipe length m Max. 25

Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Function Cooling Heating

Capacity Rated frequency (Min.-Max.)

2 kW 10.2 (3.9 - 11.0) 10.5 (4.1 - 14.0)

Breaker capacity A 25

Electrical

data

Power input (Total) 1, 2 W 3,150 2,340

Running current (Total)

1, 2 A 13.8 10.3

Power factor (Total)

1, 2% 99

Starting current (Total)

1, 2 A 13.8

Coeff cient of performance (C.O.P) (Total)

1, 2 3.24 4.49

Compressor

Model SNB220FAGMC

Output W 2,800

Current

1, 2 A 13.0 9.4

Refrigeration oil (Model) L 0.7 (FV50S)

Fan

motor

Model

E1

,

ET1

: SIC-81FW-D888-9

E2

,

ET2

,

ER1

, E3,

ET3

,

ER2

: SIC-88FWJ-D888-1

Current

1, 2 A 0.5

Dimensions W x H x D mm 950 x 796 x 330

Weight kg

E1

,

ET1

: 63 / E2,

ET2

,

ER1

, E3,

ET3

,

ER2

: 64

Special

remarks

Air f ow (Rated) m3 /h

E1

,

ET1

: 3,336 /

E2

,

ET2

,

ER1

,

E3,

ET3

,

ER2

: 3,906

4,080

Sound level (Rated) dB(A) 52 56

Fan speed (Rated) rpm

E1

,

ET1

: 620 /

E2

,

ET2

,

ER1

,

E3,

ET3

,

ER2

: 720

750

Refrigerant f lling capacity (R410A) kg 2.99

1 Measured under rated operating frequency.

2 When connected with below indoor units.
MSZ-EF18VE + MSZ-EF18VE + MSZ-EF22VE + MSZ-EF22VE + MSZ-EF22VE
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°C
HEATING INDOOR Dry-bulb temperature 20.0°C
OUTDOOR Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C

OBH723D

10

Outdoor model MXZ-2E53VAHZ

Outdoor unit power supply

Single phase

230 V, 50 Hz

System

Indoor units number 2

Piping total length m Max. 30

Connecting pipe length m Max. 20

Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Function Cooling Heating

Capacity Rated frequency (Min.-Max.)

2 kW 5.3 (1.1 - 6.0) 6.4 (1.0 - 7.0)

Breaker capacity A 16/25

3

Electrical

data

Power input (Total) 1, 2 W 1,290 1,360

Running current (Total)

1, 2 A 5.7 6.0

Power factor (Total)

1, 2% 98

Starting current (Total)

1, 2 A 6.0

Coeff cient of performance (C.O.P) (Total)

1, 2 4.11 4.71

Compressor

Model SNB220FAGMC

Output W 1,400

Current

1, 2 A 5.3 5.5

Refrigeration oil (Model) L 0.7 (FV50S)

Fan

motor

Model

E1

: SIC-81FW-D888-9, SIC-88FWJ-D888-1

ER1

: SIC-88FWJ-D888-1

Current 1, 2 A 0.3

Dimensions W x H x D mm 950 x 796 x 330

Weight kg 61

Special

remarks

Air f ow (Rated) m3 /h 2,820 2,820

Sound level (Rated) dB(A) 45 47

Fan speed (Rated) rpm 520 520

Refrigerant f lling capacity (R410A) kg 2.0

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-EF35VE
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°C
HEATING INDOOR Dry-bulb temperature 20.0°C
OUTDOOR Dry-bulb temperature 7.0°C Wet-bulb temperature 6.0°C

OBH723D

11

Outdoor model MXZ-4E83VAHZ

Outdoor unit power supply

Single phase
230 V, 50 Hz

System

Indoor units number 2 to 4

Piping total length m Max. 70

Connecting pipe length m Max. 25

Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Function Cooling Heating

Capacity Rated frequency (Min.-Max.)

2 kW 8.3 ( 3.5 - 9.2 ) 9.0 ( 3.5 - 11.6 )

Breaker capacity A 25/30

3

Electrical

data

Power input (Total) 1, 2 W 2,250 1,900

Running current (Total)

1, 2 A 9.9 8.3

Power factor (Total)

1, 2% 99

Starting current (Total)

1, 2 A 9.9

Coeff cient of performance (C.O.P) (Total)

1, 2 3.68 4.73

Compressor

Model MNB33FBTMC-L

Output W 2,200

Current

1, 2 A 9.30 7.60

Refrigeration oil (Model) L 1.10 (FV50S)

Fan

motor

Model SIC-81FW-D888-9,

SIC-88FWJ-D888-1

Current 1, 2 A 0.3

Dimensions W x H x D mm 950 x 1,048 x 330

Weight kg 87

Special

remarks

Air f ow (Rated) m3 /h 3,780 4,620

Sound level (Rated) dB(A) 53 57

Fan speed (Rated) rpm 650 770

Refrigerant f lling capacity (R410A) kg 3.9

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 °C
HEATING INDOOR Dry-bulb temperature 20.0 °C
OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C

OBH723D

12

NOISE CRITERIA CURVES

4

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

49

SPL(dB(A))51LINE

OUTDOOR UNIT

MICROPHONE

1m

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

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

50

SPL(dB(A))53LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

50

SPL(dB(A))53LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

50

SPL(dB(A))53LINE

MXZ-3E54VA MXZ-3E68VA

MXZ-4E72VA

OBH723D

13

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

52

SPL(dB(A))56LINE

MXZ-5E102VA

MXZ-4E83VAHZ

MXZ-2E53VAHZ

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

53

SPL(dB(A))57LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

45

SPL(dB(A))47LINE

OBH723D

14

OUTLINES AND DIMENSIONS

5

1.Installation space

Note : Leave front and both sides
free of obstruction.

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

500 or more

100 or more

Note : Leave front and overhead
free of obstruction.

100 or more

350 or more

200 or more

500 or more

2.Service space

100 or more

500 or more

350 or more

350 or more

100 or more

Service space

MXZ-3E54VA MXZ-3E68VA

Unit: mm

OBH723D

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 more

100 or more

Note : Leave front and overhead
free of obstruction.

100 or more

350 or more

200 or more

500 or more

2.Service space

100 or more

500 or more

350 or more

350 or more

100 or more

Service space

MXZ-4E72VA

Unit: mm

OBH723D

16

MXZ-4E83VA

Unit: mm

Air in

Air in

Air in

Air out

OBH723D

17

MXZ-5E102VA

Unit: mm

Air in

Air in

Air in

Air out

OBH723D

18

Unit: mm

MXZ-2E53VAHZ

OBH723D

19

MXZ-4E83VAHZ

Unit: mm

OBH723D

20

MXZ-3E54VA -E1 MXZ-3E54VA -

ET1

MXZ-3E54VA -

ER1

MXZ-3E68VA -E1 MXZ-3E68VA -

ET1

MXZ-3E68VA -

ER1

WIRING DIAGRAM

6

t°

21S4

t°°t°t

L

MS

3~

t°

RT64

M

LEV R LEV C LEV ALEV B

RT62

RT61

X714

X712

F711

TO INDOOR

UNIT No.C

TO INDOOR

UNIT No.A

TO INDOOR

UNIT No.B

TB2

TB3

TB4

12-24V

~230V

~230V

12-24V

~230V

12-24V

RT68 RT65

MMM

MS

3~

MF

T801

BLK

WHT

RED

RED

WHT

BLK

U

V

W

MC

CB3

CB2

CB1

BOARD

POWER P.C.

OUTDOOR

OUTDOOR CONTROL P.C. BOARD

F1

F2

TB1

BREAKER

CIRCUIT

POWER SUPPLY

~/N 230V 50Hz

IC801

5

HPS

CN63H

13

1

6

CN797

CN714

1

2

CNAC

CN712

1

2

S1

S2

S3

S1

S2

S3

S1

S2

S3

1

5

CN741

D1

IC401

IC402

2

1

CN171

1

8

CNTH1

2

1

CNTH2

555

CNMC

1

551

1

7

1

CN792 CN791CN793

1

5

5

7

1

CNF1

CN702

1

3

CNDC

U

V

W

1

3

1

CN151

1

7

CNDC

CNAC2

CN701

2

1

1

2

CN152

IC501

IC411

TAB4

TAB6

TAB5

TAB3

X52C

3

5

CN601

1

3

CN611

1

TAB1

TAB2

3

1

CNAC1

3

TBE4 TBE2 TBE1

PTC1

PTC2

X65

L

N

(BLU)

BLK

BLU

RED

BLK

BLU

WHT

BLK

BLU

ORN

BLK

BLK

BRN

BLK

BLK

(RED) (WHT)

(BLU)

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BLU

RED

BLU

BLK

BLK

BLK

BLK

BLK

BLU

GRN/YLW

WHT

ORN

+++

LEV A~C,R

MC

MF

PTC1,2

RT61

RT62

X52C

X65

X712

X714

21S4

RELAY

RELAY

RELAY

RELAY

REVERSING VALVE

SOLENOID COIL

DEFROST THERMISTOR

FIN TEMP. THERMISTOR

AMBIENT TEMP. THERMISTOR

OUTDOOR HEAT EXCHANGER

TEMPERATURE THERMISTOR

TRANSFORMER

TERMINAL BLOCK

RT64

RT65

RT68

T801

TB1~4

FAN MOTOR

COMPRESSOR

EXPANSION VALVE COIL

DISCHARGE TEMP. THERMISTOR

SMOOTHING CAPACITOR

DIODE

FUSE(T6.3AL250V)

FUSE(T6.3AL250V)

FUSE(T3.15AL250V)

HIGH PRESSURE SWITCH

CB1~3

D1

F1

F2

F711

HPS

CIRCUIT PROTECTION

NOTES:

1.About the indoor side electric

wiring refer to the indoor unit

electric wiring diagram for

servicing.

2.Use copper conductors only

(For field wiring).

3.Symbols below indicate.

:Terminal block

:Connector

SYMBOL

NAME

SYMBOL SYMBOL SYMBOL

NAME NAME NAME

SYMBOL

NAME

DIODE BRIDGE

POWER FACTOR CONTROLLER

POWER MODULE

POWER DEVICE

REACTOR

LED

IC401,402

IC411

IC501

IC801

L

LED1~3

LED3

LED2

LED1

OBH723D

21

MXZ-4E72VA -E1 MXZ-4E72VA -

ET1

MXZ-4E72VA -

ER1

t°

21S4

t°°t°t

L

MS

3~

RT64

M

LEV R LEV C LEV ALEV B

RT62

RT61

X714

X712

F711

TO INDOOR

UNIT No.C

TO INDOOR

UNIT No.A

TO INDOOR

UNIT No.B

TB2

TB3

TB4

12-24V

~230V

~230V

12-24V

~230V

12-24V

RT68 RT65

MMM

MS

3~

MF

T801

BLK

WHT

RED

RED

WHT

BLK

U

V

W

MC

CB3

CB2

CB1

BOARD

POWER P.C.

OUTDOOR

OUTDOOR CONTROL P.C. BOARD

F1

F2

TB1

BREAKER

CIRCUIT

POWER SUPPLY

~/N 230V 50Hz

LEV D

M

TO INDOOR

UNIT No.D

~230V

12-24V

TB5

IC801

5

HPS

CN63H

13

1

6

CN797

CN714

1

2

CNAC

CN712

1

2

S1

S2

S3

S1

S2

S3

S1

S2

S3

1

5

CN741

D1

IC401

IC402

2

1

CN171

1

8

CNTH1

2

1

CNTH2

555

CNMC

1

551

1

7

1

CN792 CN791CN793

1

5

5

7

1

CNF1

CN702

1

3

CNDC

U

V

W

1

3

1

CN151

1

7

CNDC

CNAC2

CN794

5

1

CN701

2

1

1

2

CN152

IC501

IC411

TAB4

TAB6

TAB5

TAB3

X52C

3

5

CN601

1

3

CN611

1

1

CN621

5

TAB1

TAB2

3

1

CNAC1

3

TBE4 TBE2 TBE1

PTC1

PTC2

X65

L

N

5

S1

S2

S3

(BLU)

BLK

BLU

RED

BLK

BLU

WHT

BLK

BLU

ORN

BLK

BLK

BRN

BLK

BLK

(RED) (WHT)

(BLU)

(YLW)

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BLU

RED

BLU

BLK

BLK

BLK

BLK

BLK

BLU

GRN/YLW

WHT

ORN

YLW

BLU

BLK

YLW

+++

LEV A~D,R

MC

MF

PTC1,2

RT61

RT62

X52C

X65

X712

X714

21S4

RELAY

RELAY

RELAY

RELAY

REVERSING VALVE

SOLENOID COIL

DEFROST THERMISTOR

FIN TEMP. THERMISTOR

AMBIENT TEMP. THERMISTOR

OUTDOOR HEAT EXCHANGER

TEMPERATURE THERMISTOR

TRANSFORMER

TERMINAL BLOCK

RT64

RT65

RT68

T801

TB1~5

FAN MOTOR

COMPRESSOR

EXPANSION VALVE COIL

DISCHARGE TEMP. THERMISTOR

SMOOTHING CAPACITOR

DIODE

FUSE(T6.3AL250V)

FUSE(T6.3AL250V)

FUSE(T3.15AL250V)

HIGH PRESSURE SWITCH

CB1~3

D1

F1

F2

F711

HPS

CIRCUIT PROTECTION

NOTES:

1.About the indoor side electric

wiring refer to the indoor unit

electric wiring diagram for

servicing.

2.Use copper conductors only

(For field wiring).

3.Symbols below indicate.

:Terminal block

:Connector

SYMBOL

NAME

SYMBOL SYMBOL SYMBOL

NAME NAME NAME

SYMBOL

NAME

DIODE BRIDGE

POWER FACTOR CONTROLLER

POWER MODULE

POWER DEVICE

REACTOR

LED

IC401,402

IC411

IC501

IC801

L

LED1~3

LED3

LED2

LED1

t°

OBH723D

22

MXZ-4E83VA -

E1

OBH723D

23

MXZ-4E83VA -

E2

OBH723D

24

MXZ-4E83VA -

E3

OBH723D

25

MXZ-4E83VA -

ET1

OBH723D

26

MXZ-4E83VA -

ET2

OBH723D

27

MXZ-4E83VA -

ET3

OBH723D

28

MXZ-4E83VA -

ER1

OBH723D

29

MXZ-4E83VA -

ER2

OBH723D

30

MXZ-5E102VA -

E1

OBH723D

31

MXZ-5E102VA -

E2

OBH723D

32

MXZ-5E102VA -

E3

OBH723D

33

MXZ-5E102VA -

ET1

OBH723D

34

MXZ-5E102VA -

ET2

OBH723D

35

MXZ-5E102VA -

ET3

OBH723D

36

MXZ-5E102VA -

ER1

OBH723D

37

MXZ-5E102VA -

ER2

OBH723D

38

MXZ-2E53VAHZ -

E1

OBH723D

39

MXZ-2E53VAHZ -

ER1

OBH723D

40

MXZ-4E83VAHZ -

E1

OBH723D

41

MXZ-4E83VAHZ -

E2

OBH723D

42

MXZ-4E83VAHZ -

ER1

OBH723D

43

MXZ-4E83VAHZ -

ER2

OBH723D

44

REFRIGERANT SYSTEM DIAGRAM

7

Strainer
#100

Power

receiver

LEV A

LEV B

LEV C

Oil separator

Compressor

Defrost
thermistor
RT61

Distributor

Muffler

4-way valve

LEV E

Indoor unit

C

Indoor unit

B

Indoor unit

A

Indoor unit

A

Indoor unit

B

Indoor unit

C

Capillary tube

Capillary tube

Capillary tube

Capillary tube

Capillary tube

Discharge
temperature

thermistor RT62

Strainer
#100

Strainer
#100

Strainer
#100

R.V. coil
OFF
ON

Refrigerant flow in cooling
Refrigerant flow in heating

Ambient
temperature
thermistor
RT65

Outdoor heat
exchanger
temperature
thermistor
RT68

FAN- OUT

HEX-OUT

Strainer
#100

Stop valve with
service port

Stop valve

High-pressure switch

UNIT: mm (inch)

UNIT: mm

MXZ-3E54VA

MAX REFRIGERANT PIPING LENGTH

Outdoor unit union diameter

For

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

Outdoor
unit

Indoor
units

15 m

10 m

15 m

Max.
Height
difference

Piping length each indoor unit (a, b, c) 25 m
Total piping length (a+b+c) 50 m
Bending point for each unit 25
Total bending point 50

It 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 CHARGE

Outdoor 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 UNIT
MXZ-3E54VA

No. of

MFZ-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 g

1 unit 100 g additional charge (2,800 g) 100 g + (L-40) x 20 g/m 3,000 g

2 units 200 g additional charge (2,900 g) 200 g + (L-40) x 20 g/m 3,100 g

3 units 300 g additional charge (3,000 g) 300 g + (L-40) x 20 g/m 3,200 g

OBH723D

45

Strainer
#100

Power

receiver

LEV A

LEV B

LEV C

Oil separator

Compressor

Defrost
thermistor
RT61

Distributor

Muffler

4-way valve

LEV E

Indoor unit

C

Indoor unit

B

Indoor unit

A

Indoor unit

A

Indoor unit

B

Indoor unit

C

Capillary tube

Capillary tube

Capillary tube

Capillary tube

Capillary tube

Discharge
temperature
thermistor RT62

Strainer
#100

Strainer
#100

Strainer
#100

R.V. coil
OFF
ON

Refrigerant flow in cooling
Refrigerant flow in heating

Ambient
temperature
thermistor
RT65

Outdoor heat
exchanger
temperature
thermistor
RT68

FAN- OUT

HEX-OUT

Strainer
#100

Stop valve with
service port

Stop valve

High-pressure switch

UNIT: mm

MXZ-3E68VA

MAX REFRIGERANT PIPING LENGTH

a

b

c

Outdoor
unit

Indoor
units

15 m

10 m

15 m

Max.
Height
difference

Piping length each indoor unit (a, b, c) 25 m
Total piping length (a+b+c) 60 m
Bending point for each unit 25
Total bending point 60

It is irrelevant which unit is higher.

ADDITIONAL REFRIGERANT CHARGE

Outdoor unit

precharged

(g)

Refrigerant piping length (one way, 3 unit total)

40 m 50 m 60 m

2,700 0 200 400

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

UNIT: mm (inch)

Outdoor unit union diameter

For

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)

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".

WHEN CONNECTING TO MFZ-KJ SERIES INDOOR UNIT
MXZ-3E68VA

No. of

MFZ-KJ

indoor units

Refrigerant piping length (L)

Maximum amount of

refrigerant

~ 40 m ~ 60 m

None Charge-less (2,700 g) (L-40) x 20 g/m 3,100 g

1 unit 100 g additional charge (2,800 g) 100 g + (L-40) x 20 g/m 3,200 g

2 units 200 g additional charge (2,900 g) 200 g + (L-40) x 20 g/m 3,300 g

3 units 300 g additional charge (3,000 g) 300 g + (L-40) x 20 g/m 3,400 g

OBH723D

46

MXZ-4E72VA

Indoor unit

D

Power

receiver

LEV A

LEV B

LEV C

LEV D

Oil separator

Compressor

Muffler

4-way valve

LEV E

Indoor unit

C

Indoor unit

B

Indoor unit

A

Indoor unit

A

Indoor unit

B

Indoor unit

C

Indoor unit

D

Capillary tube

Capillary tube

Discharge
temperature
thermistor RT62

Strainer
#100

Strainer
#100

Strainer
#100

Strainer
#100

Strainer
#100

R.V. coil
OFF
ON

Refrigerant flow in cooling
Refrigerant flow in heating

Distributor

HEX-OUT

Outdoor heat
exchanger
temperature
thermistor
RT68

Defrost
thermistor
RT61

Capillary tube

Ambient
temperature
thermistor
RT65

FAN- OUT

Strainer
#100

Stop valve with
service port

Stop valve

High-pressure
switch

UNIT: mm

a

b

c

d

Outdoor
unit

Indoor
units

15 m

10 m

15 m

Max.
Height
difference

UNIT: mm (inch)

Outdoor unit union diameter
For

Indoor unit A

Liquid 6.35(1/4)

Gas 12.7(1/2)

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)

Indoor unit D

Liquid 6.35(1/4)

Gas 9.52(3/8)

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".

MAX REFRIGERANT PIPING LENGTH

Piping length each indoor unit (a, b, c, d) 25 m

Total piping length (a+b+c+d)

60 m

Bending point for each unit 25

Total bending point 60

It is irrelevant which unit is higher.

ADDITIONAL REFRIGERANT CHARGE

Outdoor unit

precharged

(g)

Refrigerant piping length (one way, 4 unit total)

40 m 50 m 60 m

2,700 0 200 400

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

WHEN CONNECTING TO MFZ-KJ SERIES INDOOR UNIT
MXZ-4E72VA

No. of

MFZ-KJ

indoor units

Refrigerant piping length (L)

Maximum amount of

refrigerant

~ 40 m ~ 60 m

None Charge-less (2,700 g) (L-40) x 20 g/m 3,100 g

1 unit 100 g additional charge (2,800 g) 100 g + (L-40) x 20 g/m 3,200 g
2 units 200 g additional charge (2,900 g) 200 g + (L-40) x 20 g/m 3,300 g
3 units 300 g additional charge (3,000 g) 300 g + (L-40) x 20 g/m 3,400 g
4 units 400 g additional charge (3,100 g) 400 g + (L-40) x 20 g/m 3,500 g

OBH723D

47

a

b

c

d

Outdoor
unit

Indoor
units

15 m

15 m

10 m

Refrigerant piping length (one way, 4 unit total)

Calculation : Xg = 20 g/m x (Refrigerant piping length (m) - 25)

Max.
Height
difference

Outdoor unit

precharged

(g)

40 m

300

25 m

0

2,990

55 m

600

70 m

900

R.V.coil
OFF Refrigerant flow in heating
ON Refrigerant flow in cooling

Charge pipe

Compressor

Muffler

High 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

Sub
muffler

Discharge
temperature
thermistor
RT62

Outdoor
heat exchanger
temperature
thermistor
RT68

Ambient
temperature
thermistor
RT65

Defrost
temperature
thermistor
RT61

Capillary tube
Ø4.0 x Ø2.8 x 100

Indoor unit A

Indoor unit D

Indoor unit C

Indoor unit B

4-way valve

Stop valve
(with service port)

Indoor unit A

Indoor unit D

Indoor unit C

Indoor unit B

LEV B

LEV C

LEV D

Outdoor

heat exchanger

Capillary tube

Distributor

Strainer
#100

Straine

r

#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

MAX REFRIGERANT PIPING LENGTH

Outdoor unit union diameter

For

Indoor unit A

Liquid 6.35(1/4)

Gas 12.7(1/2)

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)

Indoor unit D

Liquid 6.35(1/4)

Gas 9.52(3/8)

It is irrelevant which unit is higher.

ADDITIONAL REFRIGERANT CHARGE

OBH723D

48

a

b

c

d

Outdoor
unit

Indoor
units

15 m

10 m

15 m

Refrigerant piping length (one way, 5 unit total)

Calculation : Xg = 20 g/m x (Refrigerant piping length (m) - 0)

e

Max.
Height
difference

Outdoor unit

precharged

(g)

20 m

400

0 m

0

2,990

40 m

800

60 m

1,200

80 m

1,600

R.V.coil
OFF Refrigerant flow in heating
ON Refrigerant flow in cooling

Compressor

Muffler

High 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

Sub
muffler

Discharge
temperature
thermistor
RT62

Outdoor
heat exchanger
temperature
thermistor
RT68

Ambient
temperature
thermistor
RT65

Defrost
temperature
thermistor
RT61

Capillary tube
Ø4.0 x Ø2.8 x 100

Indoor unit A

Indoor unit D

Indoor unit C

Ø9.52

Indoor unit E

Indoor unit B

4-way valve

Stop valve
(with service port)

Indoor unit A

Indoor unit D

Indoor unit C

Indoor unit B

LEV B

LEV C

LEV D

Strainer
#100

Ø6.35

Indoor unit E

LEV E

Outd

oor

heat exchanger

Capillary tube

Distributor

Strainer
#100

Strainer
#50

Charge pipe

MXZ-5E102VA

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,e) 25 m

Total piping length (a+b+c+d+e) 80 m

Bending point for each unit 25

Total bending point 80

MAX REFRIGERANT PIPING LENGTH

Outdoor unit union diameter

For

Indoor unit A

Liquid 6.35(1/4)

Gas 12.7(1/2)

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)

Indoor unit D

Liquid 6.35(1/4)

Gas 9.52(3/8)

Indoor unit E

Liquid 6.35(1/4)

Gas 9.52(3/8)

It is irrelevant which unit is higher.

ADDITIONAL REFRIGERANT CHARGE

OBH723D

49

Refrigerant piping length (one way, 2 unit total)

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

a

b

Outdoor
unit

Indoor
units

15 m

10 m

15 m

Max.
Height
difference

Outdoor unit

precharged

(g)

25 m

100

20 m

0

2,000

30 m

200

R.V.coil
OFF Refrigerant flow in heating
ON Refrigerant flow in cooling

Compressor

Muffler

High pressure switch

Ø6.35

Ø9.52

Ø9.52

Accumulator

Ø6.35

LEV A

Strainer
#100

Strainer
#100

Strainer

Union

Union

Header(Gas)

Stop valve

Header (Evaporator)

Sub
muffler

Discharge
temperature
thermistor
RT62

Outdoor
heat exchanger
temperature
thermistor
RT68

Ambient
temperature
thermistor
RT65

Defrost
temperature
thermistor
RT61

Capillary tube
Ø4.0 x Ø2.8 x 100

Indoor unit A

Indoor unit B

4-way valve

Stop valve
(with service port)

Indoor unit A

Indoor unit B

LEV B

Outdoor

heat exchanger

Capillary tube

Distributor

Strainer
#100

Strainer
#50

Charge pipe

MXZ-2E53VAHZ

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) 20 m

Total piping length (a+b) 30 m

Bending point for each unit 20

Total bending point 30

MAX REFRIGERANT PIPING LENGTH

Outdoor unit union diameter

For

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)

It is irrelevant which unit is higher.

ADDITIONAL REFRIGERANT CHARGE

OBH723D

50

MXZ-4E83VAHZ

R.V.coil

OFF Refrigerant flow in heating
ON Refrigerant flow in cooling

Compressor

Oil separator

High pressure switch

Ø6.3 5

Ø6.3 5

Ø9.5 2

Ø12. 7

Indoor unit A

Accumulator

Ø6.3 5

LEV A

Ø9.5 2

2-way
solenoid valve

Distributor

Strainer #100

Union

Union

Header(Gas)

Stop valve

Strainer

Strainer
#50

Strainer
#50

#100

Header(Evaporator)

Charge pipe

Capillary tube

Capillary tube

Ø2.5 x Ø0.6 x 1000

Ø4.0 x Ø3.0 x 200

Ø6.3 5

Discharge
temperature
thermistor RT62

Outdoor
heat exchanger
temperature
thermistor
RT68

Ambient
temperature
thermistor
RT65

Defrost
temperature
thermistor
RT61

Capillary tube
Ø4.0 x Ø2.8 x 100

Outdoor
heat exchanger

4-way valve

Stop valve
(with service port)

Indoor unit B

Indoor unit C

Ø9.5 2

Indoor unit D

Indoor unit A

Indoor unit B

Indoor unit C

Indoor unit D

Strainer #100

Strainer #100

Strainer #100 LEV B

LEV D

LEV C

Capillary tube

Refrigerant piping length (one way, 4 unit total)

Calculation : Xg = 20 g/m x (Refrigerant piping length (m) - 25)

Outdoor unit

precharged

(g)

40 m

300

25 m

0

3,900

55 m

600

70 m

900

a

b

c

d

Outdoor
unit

Indoor
units

15 m

15 m

10 m

Max.
Height
difference

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".

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

MAX REFRIGERANT PIPING LENGTH

It is irrelevant which unit is higher.

ADDITIONAL REFRIGERANT CHARGE

UNIT: mm (inch)

Outdoor unit union diameter

For

Indoor unit A

Liquid 6.35(1/4)

Gas 12.7(1/2)

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)

Indoor unit D

Liquid 6.35(1/4)

Gas 9.52(3/8)

OBH723D

51

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 refriger­ant 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

OBH723D

52

PERFORMANCE CURVES

8

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 pro­vided 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 difference

1. 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 bulb
thermometers

BACK VIEW

Wet and dry bulb
thermometers

FRONT VIEW

MXZ-3E54VA MXZ-3E68VA MXZ-4E72VA
MXZ-4E83VA MXZ-5E102VA MXZ-2E53VAHZ MXZ-4E83VAHZ

OBH723D

53

8-1. CAPACITY AND THE INPUT CURVES

0.9

1.0

1.1

1.2

1.3

0.8

-10 0 15

30

45 46

Capacity correction factors

Outdoor intake air Dry

- bulb temperature (

)

Cooling capacity

ºC

0.7

-5 51020253540

-10 0 15

30

45 46

Outdoor intake air Dry

- bulb temperature (

)

ºC

-5 51020253540

Input correction factors

Total input (Cooling)

0.9

1.0

1.1

1.2

1.3

0.8

0.7

0.6

0.5

0.4

18
16

19

22
20

24

26

18

16

19

22

20

24
26

Indoor air Wet-bulb temperature

difference (°C)

22 class

7.1

6.4

5.8

5.1

4.4

3.7

5.3

4.8

4.3

3.9

3.5

3.1

3.5

3.2

2.9

2.6

2.3

2.0

7.8

7.0

6.3

5.6

4.9

4.2

6.7

6.0

5.4

4.8

4.2

3.6

60 class

8.8

7.9

7.1

6.3

5.5

4.7

10.8

9.7

8.7

7.7

6.7

5.7

8.0

7.2

6.5

5.7

4.9

4.1

11. 3

10.1

9.0

8.0

7.0

6.0

50 class

35 class

42 class

25 class

15 class

18 class

20 class

5.8

Indoor air Wet-bulb temperature

difference (°C)

22 class

7.1

6.4

5.8

5.1

4.4

3.7

5.3

4.8

4.3

3.9

3.5

3.1

3.5

3.2

2.9

2.6

2.3

2.0

7.8

7.0

6.3

5.6

4.9

4.2

6.7

6.0

5.4

4.8

4.2

3.6

60 class

8.8

7.9

7.1

6.3

5.5

4.7

10.8

9.7

8.7

7.7

6.7

5.7

8.0

7.2

6.5

5.7

4.9

4.1

11. 3

10.1

9.0

8.0

7.0

6.0

50 class

35 class

42 class

25 class

15 class

18 class

20 class

5.8

Indoor intake air Wet-bulb temperature (°C)

Indoor intake air Wet-bulb temperature (°C)

2.7

2.3

1.9

1.7

1.4

1.1

3.0

2.4

1.8

3.0

2.3

1.6

3.5

2.8

2.1

3.9

3.1

2.3

3.3

2.5

1.7

4.7

3.7

2.7

5.0

4.0

3.0

3.8 7.3 7.8 8.5 9.7 8.7 11.9 12.4

3.8 7.3 7.8 8.5 9.7 8.7 11.9 12.4

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

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

-16 -8 -4 4 12 18

Capacity correction factors

Outdoor intake air W et

-

bulb temperature (

ºC

)

Heating capacity

15
20
26

1.4

0.5

0.4

-12 0 8 16

-16 -8 -4 4 12 18-12 0 8 16

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

0.5

0.4

Input correction factors

Total input (Heating)

26
20
15

Outdoor intake air Wet

-

bulb temperature (

ºC

)

25.4

17.1

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 class

25 class

60 class

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 class

50 class

27.0

24.9

22.8

20.7

18.7

16.6

14.5

12.4

42 class

15 class

19.0

17.6

16.1

14.5

13.0

11. 6

10.0

8.6

18 class

20 class

18.4 20.4 21.2 27.4 25.8 27.9 29.1 33.8 34.4

7.2

5.8

7.6

6.1

9.7

7.7

10.1

8.2

10.3

8.2

9.3

7.5

12.1

9.7

12.2

9.7

6.6

5.3

25.4

17.1

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 class

25 class

60 class

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 class

50 class

27.0

24.9

22.8

20.7

18.7

16.6

14.5

12.4

42 class

15 class

19.0

17.6

16.1

14.5

13.0

11. 6

10.0

8.6

18 class

20 class

7.2

5.8

7.6

6.1

9.7

7.7

10.1

8.2

10.3

8.2

9.3

7.5

12.1

9.7

12.2

9.7

6.6

5.3

Indoor air Dry-bulb temperature

difference (°C)

Indoor air Dry-bulb temperature

difference (°C)

Indoor intake air Dry-bulb temperature (°C)

Indoor intake air Dry-bulb temperature (°C)

OBH723D

54

MXZ-4E83VA MXZ-5E102VA

0.9

1.0

1.1

1.2

1.3

0.8

-10 0 15 30 4546

Capacity correction factors

Outdoor intake air Dry

- bulb temperature (

)

Cooling capacity

ºC

0.7

0.9

1.0

1.1

1.2

1.3

0.8

0.7

Input correction factors

Total input (Cooling)

0.6

0.5

0.4

-5 5 10 20 25 35 40

-10 0 15 30 4546
Outdoor intake air Dry

- bulb temperature (

)

ºC

-5 5 10 20 25 35 40

5.4

5.4

18
16

19

22

20

24

26

18

16

19

22

20

24

26

Indoor intake air Wet-bulb temperature (°C)

Indoor intake air Wet-bulb temperature (°C)

Indoor air Wet-bulb temperature

diffrrence (°C)

22 class

4.4

4.0

3.6

3.2

2.8

2.5

5.0

4.6

4.1

3.7

3.2

2.8

4.9

4.5

4.0

3.6

3.2

2.8

6.2

5.7

5.1

4.5

4.0

3.5

71 class

60 class

7.3

6.6

6.0

5.3

4.6

4.0

9.3

8.4

7.5

6.6

5.8

5.0

7.3

6.6

6.0

5.3

4.6

4.0

7.5

6.8

6.1

5.4

4.7

4.1

42 class

35 class

10.6

9.5

8.5

7.5

6.6

5.6

50 class

25 class

15 class

20 class

3.5

3.2

2.9

2.6

2.3

18 class

Indoor air Wet-bulb temperature

diffrrence (°C)

22 class

4.4

4.0

3.6

3.2

2.8

2.5

5.0

4.6

4.1

3.7

3.2

2.8

4.9

4.5

4.0

3.6

3.2

2.8

6.2

5.7

5.1

4.5

4.0

3.5

71 class

60 class

7.3

6.6

6.0

5.3

4.6

4.0

9.3

8.4

7.5

6.6

5.8

5.0

7.3

6.6

6.0

5.3

4.6

4.0

7.5

6.8

6.1

5.4

4.7

4.1

42 class

35 class

10.6

9.5

8.5

7.5

6.6

5.6

50 class

25 class

15 class

20 class

3.5

3.2

2.9

2.6

2.3

18 class

3.8 6.8 4.8 5.5 8.0 10.2 11.6 8.0 8.2

2.0

3.8 6.8 4.8 5.5 8.0 10.2 11.6 8.0 8.2

2.0

2.3

1.9

1.5

1.7

1.4

1.1

2.9

2.4

1.9

2.1

1.7

1.4

2.0

2.0

1.6

3.4

2.8

2.2

4.2

3.5

2.7

4.8

3.9

3.1

3.4

2.8

2.2

3.5

2.9

2.3

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

-16 -8 -4 4 12 18

Capacity correction factors

Outdoor intake air Wet

-

bulb temperature (

ºC

)

Heating capacity

15
20
26

0.5

0.4

1.4

-12 0 8 16

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

0.5

0.4

-16 -8 -4 4 12 18
Outdoor intake air Wet

-

bulb temperature (

ºC

)

-12 0 8 16

Input correction factors

Total input (Heating)

26

20

15

Indoor intake air Dry-bulb temperature (°C)

Indoor intake air Dry-bulb temperature (°C)

Indoor air Dry-bulb temperature

difference (°C)

22 class

25 class

60 class

71 class

35 class

42 class

50 class

15 class

20 class

18 class

Indoor air Dry-bulb temperature

difference (°C)

22 class

25 class

60 class

71 class

35 class

42 class

50 class

15 class

20 class

18 class

18.3

6.4

5.1

9.0

7.7

11. 6

10.3

14.4

12.9

17.0

15.7

19.7

6.9

5.5

9.7

8.2

12.5

11. 1

15.4

13.9

18.2

16.8

22.0

7.7

6.1

10.9

9.2

14.0

12.4

17.3

15.6

20.5

18.9

19.7

6.9

5.5

9.7

8.2

12.5

11. 1

15.4

13.9

18.2

16.8

19.7

6.9

5.5

9.7

8.2

12.5

11. 1

15.4

13.9

18.2

16.8

23.0

8.0

6.4

11. 4

9.6

14.6

13.0

18.1

16.3

21.4

19.7

31.1

10.8

8.7

15.4

13.0

19.7

17.6

24.4

21.9

28.9

26.6

32.1

11. 2

9.0

15.9

13.4

20.4

18.1

25.2

22.7

29.8

27.5

22.3

7.8

6.2

11. 0

9.3

14.2

12.6

17.5

15.7

20.7

19.1

28.3

9.9

7.9

14.0

11

.9

18.0

16.0

22.3

20.0

26.3

24.3

6.4

5.1

9.0

7.7

11. 6

10.3

14.4

12.9

17.0

15.7

6.9

5.5

9.7

8.2

12.5

11. 1

15.4

13.9

18.2

16.8

7.7

6.1

10.9

9.2

14.0

12.4

17.3

15.6

20.5

18.9

6.9

5.5

9.7

8.2

12.5

11. 1

15.4

13.9

18.2

16.8

6.9

5.5

9.7

8.2

12.5

11. 1

15.4

13.9

18.2

16.8

8.0

6.4

11. 4

9.6

14.6

13.0

18.1

16.3

21.4

19.7

10.8

8.7

15.4

13.0

19.7

17.6

24.4

21.9

28.9

26.6

11. 2

9.0

15.9

13.4

20.4

18.1

25.2

22.7

29.8

27.5

7.8

6.2

11. 0

9.3

14.2

12.6

17.5

15.7

20.7

19.1

9.9

7.9

14.0

11. 9

18.0

16.0

22.3

20.0

26.3

24.3

OBH723D

55

MXZ-2E53VAHZ

0.9

1.0

1.1

1.2

1.3

0.8

-10 0 15 30 45 46

Capacity correction factors

Outdoor intake air Dry

- bulb temperature (

)

Cooling capacity

ºC

0.7

0.9

1.0

1.1

1.2

1.3

0.8

0.7

Input correction factors

Total input (Cooling)

0.6

0.5

0.4

-5 5 10 20 25 35 40

-10 0 15 30 45 46

Outdoor intake air Dry

- bulb temperature (

)

ºC

-5 5 10 20 25 35 40

5.4

5.4

18
16

19

22
20

24

26

18

16

19

22

20

24
26

Indoor intake air Wet-bulb temperature (°C)

Indoor intake air Wet-bulb temperature (°C)

Indoor air Wet-bulb temperature

diffrrence (°C)

22 class

4.4

4.0

3.6

3.2

2.8

2.5

5.0

4.6

4.1

3.7

3.2

2.8

4.9

4.5

4.0

3.6

3.2

2.8

6.2

5.7

5.1

4.5

4.0

3.5

7.3

6.6

6.0

5.3

4.6

4.0

9.3

8.4

7.5

6.6

5.8

5.0

42 class

35 class

10.6

9.5

8.5

7.5

6.6

5.6

50 class

25 class

15 class

20 class

3.5

3.2

2.9

2.6

2.3

18 class

Indoor air Wet-bulb temperature

diffrrence (°C)

22 class

4.4

4.0

3.6

3.2

2.8

2.5

5.0

4.6

4.1

3.7

3.2

2.8

4.9

4.5

4.0

3.6

3.2

2.8

6.2

5.7

5.1

4.5

4.0

3.5

7.3

6.6

6.0

5.3

4.6

4.0

9.3

8.4

7.5

6.6

5.8

5.0

42 class

35 class

10.6

9.5

8.5

7.5

6.6

5.6

50 class

25 class

15 class

20 class

3.5

3.2

2.9

2.6

2.3

18 class

3.8

6.8

4.8 5.5 8.0 10.2

11. 6

2.0

3.8

6.8

4.8 5.5 8.0 10.2

11. 6

2.0

2.3

1.9

1.5

1.7

1.4

1.1

2.9

2.4

1.9

2.1

1.7

1.4

2.0

2.0

1.6

3.4

2.8

2.2

4.2

3.5

2.7

4.8

3.9

3.1

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

-26 -18 -6 2 10 18

Capacity correction factors

Outdoor intake air Wet

-

bulb temperature (

ºC

)

Heating capacity

15

20

26

0.5

1.4

-22 -14 -10 -2 6 14

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

0.5

1.4

1.5

1.6

1.7

-26 -18 -6 2 10 18-22 -14 -10 -2 6 14
Outdoor intake air W et

-

bulb temperature (

ºC

)

Input correction factors

Total input (Heating)

26

20

15

Indoor intake air Dry-bulb temperature (°C)

Indoor intake air Dry-bulb temperature (°C)

Indoor air Dry-bulb temperature

difference (°C)

22 class

25 class

35 class

42 class

50 class

15 class

20 class

18 class

Indoor air Dry-bulb temperature

difference (°C)

22 class

25 class

35 class

42 class

50 class

15 class

20 class

18 class

6.4

18.3

6.4 6.9 7.7

6.9

8.0

10.8

11.2

18.3 19.7 22.0

19.7

23.0

31.1

32.1

19.6 21.2 23.5

21.2

24.6

33.3

34.4

20.9 22.7 25.0

22.7

26.2

35.5

36.7

22.2 24.2 26.5

24.2

27.8

37.7

39.0

12.9

14.4

15.7

17.0

7.7

9.0

10.3

11.6

13.9

15.4

16.8

18.2

8.2

9.7

11.1

12.5

15.6

17.3

18.9

20.5

9.2

10.9

12.4

14.0

13.9

15.4

16.8

18.2

8.2

9.7

11.1

12.5

6.9

19.7

21.2

22.7

24.2

13.9

15.4

16.8

18.2

8.2

9.7

11.1

12.5

16.3

18.1

19.7

21.4

9.6

11.4

13.0

14.6

21.9

24.4

26.6

28.9

13.0

15.4

17.6

19.7

22.7

25.2

27.5

29.8

13.4

15.9

18.1

20.4

17.0

15.7

14.4

12.9

11. 6

10.3

9.0

7.7

6.9

19.7

18.2

16.8

15.4

13.9

12.5

11. 1

9.7

8.2

7.7

22.0

20.5

18.9

17.3

15.6

14.0

12.4

10.9

9.2

6.9

19.7

18.2

16.8

15.4

13.9

12.5

11. 1

9.7

8.2

6.9

19.7

18.2

16.8

15.4

13.9

12.5

11. 1

9.7

8.2

8.0

23.0

21.4

19.7

18.1

16.3

14.6

13.0

11. 4

9.6

10.8

31.1

28.9

26.6

24.4

21.9

19.7

17.6

15.4

13.0

11. 2

32.1

29.8

27.5

25.2

22.7

20.4

18.1

15.9

13.4

OBH723D

56

MXZ-4E83VAHZ

0.9

1.0

1.1

1.2

1.3

0.8

-10 0 15 30 4546

Capacity correction factors

Outdoor intake air Dry

- bulb temperature (

)

Cooling capacity

ºC

0.7

-5 5 10 20 25 35 40

0.9

1.0

1.1

1.2

1.3

0.8

0.7

-10 0 15 30 4546
Outdoor intake air Dry

- bulb temperature (

)

ºC

-5 5 10 20 25 35 40

0.6

0.5

0.4

Input correction factors

Total input (Cooling)

5.4

5.4

18
16

19

22
20

24

26

18

16

19

22

20

24
26

Indoor intake air Wet-bulb temperature (°C)

Indoor intake air Wet-bulb temperature (°C)

Indoor air Wet-bulb temperature

diffrrence (°C)

22 class

4.4

4.0

3.6

3.2

2.8

2.5

5.0

4.6

4.1

3.7

3.2

2.8

4.9

4.5

4.0

3.6

3.2

2.8

6.2

5.7

5.1

4.5

4.0

3.5

71 class

60 class

7.3

6.6

6.0

5.3

4.6

4.0

9.3

8.4

7.5

6.6

5.8

5.0

7.3

6.6

6.0

5.3

4.6

4.0

7.5

6.8

6.1

5.4

4.7

4.1

42 class

35 class

10.6

9.5

8.5

7.5

6.6

5.6

50 class

25 class

15 class

20 class

3.5

3.2

2.9

2.6

2.3

18 class

Indoor air Wet-bulb temperature

diffrrence (°C)

22 class

4.4

4.0

3.6

3.2

2.8

2.5

5.0

4.6

4.1

3.7

3.2

2.8

4.9

4.5

4.0

3.6

3.2

2.8

6.2

5.7

5.1

4.5

4.0

3.5

71 class

60 class

7.3

6.6

6.0

5.3

4.6

4.0

9.3

8.4

7.5

6.6

5.8

5.0

7.3

6.6

6.0

5.3

4.6

4.0

7.5

6.8

6.1

5.4

4.7

4.1

42 class

35 class

10.6

9.5

8.5

7.5

6.6

5.6

50 class

25 class

15 class

20 class

3.5

3.2

2.9

2.6

2.3

18 class

3.8 6.8 4.8 5.5 8.0 10.2 11.6 8.0 8.2

2.0

3.8 6.8 4.8 5.5 8.0 10.2 11.6 8.0 8.2

2.0

2.3

1.9

1.5

2.0

2.0

1.6

3.4

2.8

2.2

4.2

3.5

2.7

4.8

3.9

3.1

3.4

2.8

2.2

3.5

2.9

2.3

2.1

1.7

1.4

1.7

1.4

1.1

2.9

2.4

1.9

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

-26 -18 -10 2 10 18

Capacity correction factors

Outdoor intake air Wet

-

bulb temperature (

ºC

)

Heating capacity

15

20
26

0.5

1.4

-22 -14 -6 -2 6 14

-26 -18 -10 2 10 18

Outdoor intake air Wet

-

bulb temperature (

ºC

)

-22 -14 -6 -2 6 14

Input correc tion factors

Total input (Heating)

26
20
15

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

0.5

1.4

1.5

1.6

1.7

Indoor intake air Dry-bulb temperature (°C)

Indoor intake air Dry-bulb temperature (°C)

Indoor air Dry-bulb temperature

difference (°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

10.9

9.2

18.2

16.8

15.4

13.9

12.5

11. 1

9.7

8.2

22 class

25 class

60 class

71 class

21.4

19.7

18.1

16.3

14.6

13.0

11. 4

9.6

28.9

26.6

24.4

21.9

19.7

17.6

15.4

13.0

20.7

19.1

17.5

15.7

14.2

12.6

11. 0

9.3

26.3

24.3

22.3

20.0

18.0

16.0

14.0

11. 9

35 class

42 class

29.8

27.5

25.2

22.7

20.4

18.1

15.9

13.4

50 class

15 class

20 class

18.2

16.8

15.4

13.9

12.5

11. 1

9.7

8.2

18 class

Indoor air Dry-bulb temperature

difference (°C)

22 class

25 class

60 class

71 class

35 class

42 class

50 class

15 class

20 class

18 class

6.4

6.9

7.7

6.9 6.9

8.0

10.8

11. 2

7.8 9.9

18.3 19.7 22.0 19.7 19.7 23.0 31.1 32.1 22.3 28.3

6.4

6.9

7.7

6.9

8.0

10.8

11.2

7.8 9.9

18.3 19.7 22.0 19.7 23.0 31.1 32.1 22.3 28.3

19.6 21.2 23.5 21.2 24.6 33.3 34.4 23.9 30.3

20.9 22.7 25.0 22.7 26.2 35.5 36.7 25.5 32.3

22.2 24.2 26.5 24.2 27.8 37.7 39.0 27.1 34.3

12.9

14.4

15.7

17.0

7.7

9.0

10.3

11.6

13.9

15.4

16.8

18.2

8.2

9.7

11.1

12.5

15.6

17.3

18.9

20.5

9.2

10.9

12.4

14.0

13.9

15.4

16.8

18.2

8.2

9.7

11.1

12.5

6.9

19.7

21.2

22.7

24.2

13.9

15.4

16.8

18.2

8.2

9.7

11.1

12.5

16.3

18.1

19.7

21.4

9.6

11.4

13.0

14.6

21.9

24.4

26.6

28.9

13.0

15.4

17.6

19.7

22.7

25.2

27.5

29.8

13.4

15.9

18.1

20.4

15.7

17.5

19.1

20.7

9.3

11.0

12.6

14.2

20.0

22.3

24.3

26.3

11.9

14.0

16.0

18.0

OBH723D

57

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

Frequency

Hz

Frequency

Hz

0 50 100 150

1.0

1.5

2.0

2.5

050100150

1.0

1.5

2.0

2.5

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

Frequency

Hz

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

<HEAT>Capacity

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<HEAT>Total input

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

Frequency

Hz

0 50 100 150

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

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

Frequency

Hz

<COOL>Total input

Frequency

Hz

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

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<COOL>Total input

Frequency

Hz

<COOL>Capacity

Frequency

Hz

0 50 100 150

1.0

1.5

2.0

<COOL>Total input

Frequency

Hz

0 50 100 150

1.0

1.5

2.0

MXZ-3E54VA
15-class unit

22-class unit

18-class unit

20-class unit

OBH723D

58

25-class unit

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<HEAT>Total input

Frequency

Hz

<COOL>Capacity

Frequency

Hz

<HEAT>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

<HEAT>Total input

Frequency

Hz

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

<COOL>Capacity

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<HEAT>Total input

Frequency

Hz

MXZ-3E54VA

35-class unit

42-class unit

50-class unit

OBH723D

59

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

<COOL>Capacity

Frequency

Hz

0 50 100 150

1.0

1.5

2.0

<COOL>Total input

Frequency

Hz

0 50 100 150

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Total input

Frequency

Hz

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

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

Frequency

Hz

0 50 100 150

1.0

1.5

2.0

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

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

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

050100150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

MXZ-3E68VA
15-class unit

22-class unit

25-class unit

20-class unit

18-class unit

OBH723D

60

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

Frequency

Hz

<COOL>Capacity

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<COOL>Total input

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

Frequency

Hz

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

Frequency

Hz

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

Frequency

Hz

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

MXZ-3E68VA

35-class unit

42-class unit

50-class unit

60-class unit

OBH723D

61

MXZ-4E72VA

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

Frequency

Hz

<COOL>Capacity

Frequency

Hz

0 50 100 150

1.0

1.5

2.0

<COOL>Total input

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

0 50 100 150

1.0

1.5

2.0

Frequency

Hz

Frequency

Hz

0 50 100 150

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Total input

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

Frequency

Hz

<COOL>Capacity

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Total input

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

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

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

15-class unit

22-class unit

25-class unit

20-class unit

18-class unit

OBH723D

62

MXZ-4E72VA

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

Frequency

Hz

<COOL>Capacity

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<COOL>Total input

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

Frequency

Hz

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

Frequency

Hz

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

Frequency

Hz

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

OBH723D

63

MXZ-4E83VA

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

1

2

3

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

1

2

3

15-class unit

22-class unit

25-class unit

20-class unit

18-class unit

OBH723D

64

MXZ-4E83VA

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

<HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

<HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

<HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

<HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

<HEAT>Total input

Frequency

Hz

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

71-class unit

35-class unit

OBH723D

65

MXZ-5E102VA

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.0

0.5

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

1

2

3

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

1

2

3

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

15-class unit

22-class unit

25-class unit

20-class unit

18-class unit

OBH723D

66

MXZ-5E102VA

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

<HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

<HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

<HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

<HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

<HEAT>Total input

Frequency

Hz

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

71-class unit

35-class unit

OBH723D

67

MXZ-2E53VAHZ

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

1

2

3

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

1

2

3

15-class unit

22-class unit

25-class unit

20-class unit

18-class unit

OBH723D

68

MXZ-2E53VAHZ

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

<HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

<HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity

Frequency

Hz

<HEAT>Total input

Frequency

Hz

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

35-class unit

OBH723D

69

MXZ-4E83VAHZ

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<COOL>Capacity

Frequency

Hz

<COOL>Total input

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

2.5

<HEAT>Capacity <HEAT>Total input

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

Frequency

Hz

0 50 100 150

0.5

1.0

1.5

2.0

15-class unit

22-class unit

25-class unit

20-class unit

18-class unit

OBH723D

70

MXZ-4E83VAHZ

<COOL>Capacity

Frequency

Hz

<HEAT>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

<HEAT>Total input

Frequency

Hz

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

Frequency

Hz

<HEAT>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

<HEAT>Total input

Frequency

Hz

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

2.0

<COOL>Capacity

Frequency

Hz

<HEAT>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

<HEAT>Total input

Frequency

Hz

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

Frequency

Hz

<HEAT>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

<HEAT>Total input

Frequency

Hz

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

Frequency

Hz

<HEAT>Capacity

Frequency

Hz

<COOL>Total input

Frequency

Hz

<HEAT>Total input

Frequency

Hz

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

2.0

42-class unit

50-class unit

60-class unit

71-class unit

35-class unit

OBH723D

71

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

Outdoor low pressure

(MPa[Gauge])

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor unit current (A)

50 60

70

(%)

40Hz

13

12

11

10

8

9

7

6

40Hz

15 20 25 30 35

0.6

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

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

15

20 25

30

35

50 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

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

15

20 25

30

35

50 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

Outdoor low pressure

(MPa[Gauge])

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor unit current (A)

50 60

70

(%)

40Hz

13

12

11

10

8

9

7

6

40Hz

15 20 25 30 35

0.6

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

OBH723D

72

25-class unit

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

0.6

0.7

0.8

0.9

1.0

1.1

1.2

40Hz

1

2

3

4

5

40Hz

12

11

10

9

8

7

6

15

20 25

30

35

50 60

70

(%)

15

20 25

30

35

50 60

70

(%)

35-class unit

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

0.7

0.8

0.9

1.0

1.1

1.2

1.3

40Hz

1

2

3

4

5

40Hz

13

12

11

10

9

8

7

15

20 25

30

35

50 60

70

(%)

15

20 25

30

35

50 60

70

(%)

MXZ-3E54VA

42-class unit

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (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

1.3

40Hz

15 20 25 30 35

1

2

3

4

5

40Hz

50-class unit

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

0.7

0.8

0.9

1.0

1.1

1.2

1.3

40Hz

1

2

3

4

5

40Hz

13

12

11

10

9

8

7

15

20 25

30

35

50 60

70

(%)

15

20 25

30

35

50 60

70

(%)

15-class unit

MXZ-3E68VA MXZ-4E72VA

Outdoor low pressure

(MPa[Gauge])

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor unit current (A)

50 60

70

(%)

30Hz

13

12

11

10

8

9

7

6

30Hz

15 20 25 30 35

0.6

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

Outdoor low pressure

(MPa[Gauge])

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor unit current (A)

50 60

70

(%)

30Hz

14

13

12

11

9

10

8

7

30Hz

15 20 25 30 35

0.7

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

Outdoor low pressure

(MPa[Gauge])

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor unit current (A)

50 60

70

(%)

30Hz

13

12

11

10

8

9

7

6

30Hz

15 20 25 30 35

0.6

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

Outdoor low pressure

(MPa[Gauge])

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor unit current (A)

50 60

70

(%)

30Hz

14

13

12

11

9

10

8

7

30Hz

15 20 25 30 35

0.7

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

OBH723D

73

MXZ-3E68VA MXZ-4E72VA

42-class unit

Outdoor low pressure

(MPa[Gauge])

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor unit current (A)

50 60

70

(%)

30Hz

14

13

12

11

9

10

8

7

30Hz

15 20 25 30 35

0.7

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 unit

Outdoor low pressure

(MPa[Gauge])

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor unit current (A)

50 60

70

(%)

30Hz

14

13

12

11

9

10

8

7

30Hz

15 20 25 30 35

0.7

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

Outdoor low pressure

(MPa[Gauge])

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor unit current (A)

50 60

70

(%)

30Hz

14

13

12

11

9

10

8

7

30Hz

15 20 25 30 35

0.7

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

MXZ-4E83VA

15-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

12

11

10

9

8

7

6

15 20 25 30 35

0.6

0.7

0.8

0.9

1.0

1.1

1.2

15 20 25 30 35

1

2

3

4

5

6

18-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

25-class unit

Outdoor low pressure

(MPa[Gauge])

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor unit current (A)

50 60

70

(%)

30Hz

14

13

12

11

9

10

8

7

30Hz

15 20 25 30 35

0.7

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

Outdoor low pressure

(MPa[Gauge])

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

Outdoor unit current (A)

50 60

70

(%)

30Hz

14

13

12

11

9

10

8

7

30Hz

15 20 25 30 35

0.7

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

OBH723D

74

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

25-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

35-class unit

MXZ-4E83VA

20-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

12

11

10

9

8

7

6

15 20 25 30 35

0.6

0.7

0.8

0.9

1.0

1.1

1.2

15 20 25 30 35

1

2

3

4

5

6

22-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

42-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

14

13

12

11

10

9

8

15 20 25 30 35

0.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 35

1

2

3

4

5

6

60-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

50-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

14

13

12

11

10

9

8

15 20 25 30 35

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

71-class unit

OBH723D

75

MXZ-5E102VA

15-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

12

11

10

9

8

7

6

15 20 25 30 35

0.6

0.7

0.8

0.9

1.0

1.1

1.2

15 20 25 30 35

1

2

3

4

5

6

20-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

12

11

10

9

8

7

6

15 20 25 30 35

0.6

0.7

0.8

0.9

1.0

1.1

1.2

15 20 25 30 35

1

2

3

4

5

6

22-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

18-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

25-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

35-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

42-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

50-class unit

OBH723D

76

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

14

13

12

11

10

9

8

15 20 25 30 35

0.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 35

1

2

3

4

5

6

60-class unit

MXZ-5E102VA

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

14

13

12

11

10

9

8

15 20 25 30 35

0.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 35

1

2

3

4

5

6

71-class unit

MXZ-2E53VAHZ

15-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

12

11

10

9

8

7

6

15 20 25 30 35

0.6

0.7

0.8

0.9

1.0

1.1

1.2

15 20 25 30 35

1

2

3

4

5

6

18-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

20-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

12

11

10

9

8

7

6

15 20 25 30 35

0.6

0.7

0.8

0.9

1.0

1.1

1.2

15 20 25 30 35

1

2

3

4

5

6

22-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

25-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

35-class unit

OBH723D

77

MXZ-2E53VAHZ

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

42-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

24Hz

24Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

50-class unit

MXZ-4E83VAHZ

15-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

18Hz

18Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

18-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

18Hz

18Hz

14

13

12

12

10

9

8

15 20 25 30 35

0.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 35

1

2

3

4

5

6

20-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

18Hz

18Hz

13

12

11

10

9

8

7

15 20 25 30 35

0.7

0.8

0.9

1.0

1.1

1.2

1.3

15 20 25 30 35

1

2

3

4

5

6

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

18Hz

18Hz

14

13

12

12

10

9

8

15 20 25 30 35

0.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 35

1

2

3

4

5

6

25-class unit

22-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

18Hz

18Hz

14

13

12

12

10

9

8

15 20 25 30 35

0.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 35

1

2

3

4

5

6

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

18Hz

18Hz

14

13

12

11

10

9

8

15 20 25 30 35

0.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 35

1

2

3

4

5

6

35-class unit

OBH723D

78

MXZ-4E83VAHZ

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

18Hz

18Hz

15

13

12

11

10

9

8

14

15 20 25 30 35

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

15 20 25 30 35

1

2

3

4

5

6

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

18Hz

18Hz

15

13

12

11

10

9

8

14

15 20 25 30 35

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

15 20 25 30 35

1

2

3

4

5

6

50-class unit

60-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

18Hz

18Hz

15

13

12

11

10

9

8

14

15 20 25 30 35

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

15 20 25 30 35

1

2

3

4

5

6

71-class unit

Outdoor low pressure

(MPa[Gauge])

Outdoor unit current (A)

Ambient temperature ( )
Ambient humidity (%)

Ambient temperature ( )
Ambient humidity (%)

50 60

70

(%)

50 60

70

(%)

18Hz

18Hz

14

13

12

11

10

9

8

15 20 25 30 35

0.8

0.9

1.0

1.1

1.2

1.3

1.4

15 20 25 30 35

1

2

3

4

5

6

42-class unit

OBH723D

79

Condition:

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

(2) HEAT operation

Dry bulb temperature (°C)

Indoor

20.0

14.5

2

1

Outdoor

7

6

151220.0

14.5

Wet bulb temperature (°C)

22-class unit

25-class unit

35-class unit

MXZ-3E54VA

42-class unit

50-class unit

15-class unit

20-class unit

50 10152025

2

3

4

5

6

7

Ambient temperature ( )

48Hz

Outdoor unit current (A)

5010152025

2

3

4

5

6

7

Ambient temperature ( )

48Hz

Outdoor unit current (A)

5010152025

2

3

4

5

6

7

Ambient temperature ( )

48Hz

Outdoor unit current (A)

Ambient temperature (

)

Outdoor unit current (A)

48Hz

0 5 10 15 20 25

2

3

4

5

6

7

5010152025

2

3

4

5

6

7

Ambient temperature ( )

48Hz

Outdoor unit current (A)

Ambient temperature ( )

Outdoor unit current (A)

48Hz

0510

15 20 25

2

3

4

5

6

7

Outdoor unit current (A)

Ambient temperature ( )

48Hz

0510

15 20 25

2

3

4

5

6

7

18-class unit

50 10152025

2

3

4

5

6

7

Ambient temperature ( )

48Hz

Outdoor unit current (A)

22-class unit

25-class unit

35-class unit

MXZ-3E68VA MXZ-4E72VA

42-class unit 50-class unit

15-class unit

20-class unit

Ambient temperature ( )

Outdoor unit current (A)

36Hz

0510

15 20 25

2.0

3.0

4.0

5.0

6.0

7.0

Ambient temperature ( )

Outdoor unit current (A)

36Hz

0510

15 20 25

3.0

4.0

5.0

6.0

7.0

8.0

Ambient temperature ( )

Outdoor unit current (A)

36Hz

0510

15 20 25

2.0

3.0

4.0

5.0

6.0

7.0

Ambient temperature ( )

Outdoor unit current (A)

36Hz

0510

15 20 25

3.0

4.0

5.0

6.0

7.0

8.0

Ambient temperature ( )

Outdoor unit current (A)

36Hz

0510

15 20 25

3.0

4.0

5.0

6.0

7.0

8.0

Ambient temperature ( )

Outdoor unit current (A)

36Hz

0510

15 20 25

3.0

4.0

5.0

6.0

7.0

8.0

Ambient temperature ( )

Outdoor unit current (A)

36Hz

0510

15 20 25

3.0

4.0

5.0

6.0

7.0

8.0

18-class unit

Ambient temperature ( )

Outdoor unit current (A)

36Hz

0510

15 20 25

3.0

4.0

5.0

6.0

7.0

8.0

OBH723D

80

60-class unit

Ambient temperature ( )

Outdoor unit current (A)

36Hz

0510

15 20 25

2.0

3.0

4.0

5.0

6.0

7.0

35-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

42-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

50-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

60-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

22-class unit 25-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

MXZ-4E83VA

15-class unit

20-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

71-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

18-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

MXZ-5E102VA

15-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

18-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

22-class unit 20-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

25-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

35-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

MXZ-3E68VA MXZ-4E72VA

50-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

42-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

OBH723D

81

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

60-class unit 71-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

MXZ-5E102VA

35-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

42-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

50-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

22-class unit 25-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

MXZ-2E53VAHZ

15-class unit

20-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

18-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

32Hz

Outdoor unit current (A)

MXZ-4E83VAHZ

15-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

20Hz

Outdoor unit current (A)

18-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

20Hz

Outdoor unit current (A)

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

20Hz

Outdoor unit current (A)

22-class unit 20-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

20Hz

Outdoor unit current (A)

25-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

20Hz

Outdoor unit current (A)

35-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

20Hz

Outdoor unit current (A)

50-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

20Hz

Outdoor unit current (A)

42-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

20Hz

Outdoor unit current (A)

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

20Hz

Outdoor unit current (A)

60-class unit 71-class unit

0 5 10 15 20 25

2

3

4

5

6

7

Ambient temperature ( )

20Hz

Outdoor unit current (A)

OBH723D

82

ACTUATOR CONTROL

9

Relation between main sensor and actuator

Sensor Purpose

Actuator

Compres-

sor

LEV

Outdoor

fan motor

4-way

valve

2-way
solenoid
valve

1

Defrost

heater

2

Discharge temperature
thermistor

Protection

Indoor coil
temperature thermistor

Cooling: Coil frost prevention
Heating:

High pressure protection
Defrost thermistor Heating: Defrosting
Fin temperature thermistor Protection

Ambient temperature
thermistor

Control/Protection
Heating: Defrosting (Heater)

Outdoor heat exchanger
temperature thermistor

Cooling: Control/Protection

Capacity code Control

1 MXZ-4E83VAHZ
2 MXZ-2E53VAHZ, 4E83VAHZ

MXZ-3E54VA MXZ-3E68VA MXZ-4E72VA
MXZ-4E83VA MXZ-5E102VA MXZ-2E53VAHZ MXZ-4E83VAHZ

OBH723D

83

SERVICE FUNCTIONS

10

10-1. PRE-HEAT CONTROL

If moisture gets into the refrigerant cycle, or when refrigerant is liquefied and collected in the compressor, it may interfere
the startup of the compressor.
To improve startup 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

SW1

ON

5

6

SW1

Cool/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

MXZ-3E54VA MXZ-3E68VA MXZ-4E72VA
MXZ-4E83VA MXZ-5E102VA MXZ-2E53VAHZ MXZ-4E83VAHZ

OBH723D

84

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]

1. Check that outside temperature is above 0˚C.
(This function does not work when outside temperature is not above 0˚C.)

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)

Lighted

Once

LED2 (Yellow)

Not lighted

Once

Other indications

LED3 (Green)

Lighted

Once

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)

Lighted
Lighted

Not corrected
Corrected

Number of blinks

Wiring line

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

OBH723D

85

10-5. CHANGING THE AMPERE LIMIT (MXZ-2E53VAHZ 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 setting

13.6 A

21 A

18.4 A

Factory setting

25 A

OBH723D

86

11

TROUBLESHOOTING

3. Troubleshooting procedure

1)

Check if the OPERATION INDICATOR lamp on the indoor unit is f ashing on and off to indicate an abnormality. To

make sure, check how many times the OPERATION INDICATOR lamp is f 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 TROUBLESHOOTING

1. 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 servicing

1) Before servicing the air conditioner, be sure to turn OFF the unit f rst with the remote controller, and after conf 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 FUNCTION

This 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>

MXZ-3E54VA MXZ-3E68VA MXZ-4E72VA
MXZ-4E83VA MXZ-5E102VA MXZ-2E53VAHZ MXZ-4E83VAHZ

OBH723D

87

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

2.Blinking pattern when outdoor unit is abnormal:

ON

OFF

No beep

Beeps

Repeated cycle

2.5-second OFF 3-second ON

Blinking at 0.5­second interval

No beep Beeps

Repeated cycle

2.5-second OFF 3-second ON

Blinking 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 table of outdoor unit failure mode recall function (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

Release the failure mode recall function. 3

3 Refer to the service manual of indoor unit.

Release the failure mode recall function. 3

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

3

OBH723D

88

3. Table of outdoor unit failure mode recall function

The 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 function

LED1 LED2
OFF None (Normal) Lighted Lighted
2-time f ash Outdoor power system Lighted Lighted

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

• Check the connection of the com­pressor connecting wire.

• Refer to 11-6.

"How to check inverter/compres-

sor".

• Check the stop valve.

○

3-time f ash

Discharge temperature thermistor

Lighted Once

A thermistor shorts or opens during
compressor running.

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

○

Defrost thermistor

Lighted Once

Ambient temperature thermistor

Lighted Twice

Fin temperature thermistor

Lighted 3 times

P.C. board temperature thermis­tor

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

board.

Outdoor heat exchanger tem­perature thermistor

Lighted 9 times • Refer to 11-6.

"Check of outdoor

thermistors".

4-time f ash Overcurrent Once Not

lighted

21 A current f ows into power module.

• Reconnect compressor connector.

• Refer to 11-6.

"How to check in-

verter/compressor".

• Check the stop valve.

—

5-time f 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 tem­perature thermistor reads 80°C (MXZ-

3E54/3E68/4E72VA)/95°C (MXZ­4E83/5E102VA, MXZ-2E52VAHZ)/100°C

(MXZ-4E83VAHZ) or less 3 minutes later.

• Check refrigerant circuit and refrig­erant amount.

• Refer to 11-6.

"Check of LEV".

—

6-time f ash High pressure Lighted Lighted

The outdoor heat exchanger temperature ex­ceeds 70°C during cooling or the indoor gas pipe
temperature exceeds 70°C during heating.

• Check refrigerant circuit and refrig­erant amount.

• Check the stop valve.

—

7-time f ash Fin temperature 3 times Not

lighted

The fin temperature exceeds 88°C (MXZ-

3E54/3E68/4E72/4E83/5E102VA, MXZ­2E52VAHZ)/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

lighted

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

8-time f 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 f ash Outdoor control system Lighted 5 times

Nonvolatile memory data cannot be read prop­erly.

• Replace the outdoor control P.C. board.

○

10-time f ash Low discharge temperature

protection

Lighted 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.

• Check refrigerant circuit and refrig­erant amount.

• Refer to 11-6.

"Check of LEV".

—

11-time f ash Communication error

between P.C. boards

Lighted 6 times

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 control P.C. board and out­door power P.C. board.

—

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

○

Current sensor Lighted 7 times

A short or open circuit is detected in the cur­rent 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 out­door power P.C. board.

—

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

○

Converter 5 times Not

lighted

A 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 f 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.).

OBH723D

89

Operation start

Check the outdoor unit
LED indicator.

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

• Indoor unit
serial signal
error
Refer to 11-6.
"How to
check
miswiring and
serial signal
error".

• COOL or
HEAT
operation only
Refer to 11-6.
"Check of
R.V. coil".

• When cooling,
room is not
cool.
Refer to 11-6.
"How to check
inverter/
compressor".

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

• When heating, non­operating indoor unit
gets warm.
Refer to 11-6.
"Check of LEV".

• When heating,
room does not get
warm.
Refer to 11-6.
"How to check
inverter/compressor".
Check mispiping,
shortage of capacity.

• When cooling
dew drops in the
non-operating
indoor unit.
Check of
mispiping.

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

Both LED1 and
LED2 are OFF.

Both LED1 and
LED2 are lighting.

LED1 or LED2
has 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.

OBH723D

90

11-4. TROUBLESHOOTING CHECK TABLE

No. Symptom

Indication

Abnormal point / Con-

dition

Condition Remedy

LED1(Red) LED2(Yellow)

1 Outdoor

unit does
not 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 consecu­tive times within 1 minute after the compressor
gets started, or converter protection cut-out or bus­bar voltage protection cut-out operates 3 consecu­tive times within 3 minutes after startup.

• Check the connection of the compressor connect­ing wire.

• Refer to 11-6.

"How to check inverter/compres-

sor".

• Check the stop valve.

3

Lighted 3 times

Discharge temperature
thermistor

A short circuit is detected in the thermistor during
operation, or an open circuit is detected in the ther­mistor after 10 minutes of compressor startup.

• Refer to 11-6.

"Check of outdoor thermistors".

4

Lighted 4 times

Fin temperature
thermistor

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

• Refer to 11-6.

"Check of outdoor thermistors".

P. C. board tempera­ture thermistor

• Replace the outdoor control P.C. board.

5

Lighted 5 times

Ambient temperature
thermistor

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

• Refer to 11-6.

"Check of outdoor thermistors".

Outdoor heat ex­changer temperature
thermistor

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

Defrost thermistor

A short circuit is detected in the thermistor during
operation, or an open circuit is detected in the ther­mistor after 5 minutes of compressor startup.

6

Lighted 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 con­secutive times.

• Replace the outdoor power P.C. board.

9

Lighted 11 times

Communication error
between P.C. boards

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

• Check the connecting wire between outdoor con­trol 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.

10

Lighted 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 cur­rent 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 volt­age 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 lighted

IPM protection

Overcurrent is detected after 30 seconds of com­pressor startup.

• 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 com­pressor startup.

15

3 times Not lighted

Discharge temperature
protection

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 temperature
thermistor reads 80°C (MXZ-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 temperature
protection

The f n temperature exceeds during operation.

•Check refrigerant circuit and refrigerant amount.

•Refer to 11-6.

"Check of outdoor fan motor".

P.C. board temperature
protection

The P.C. board temperature exceeds during opera­tion.

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 tem­perature 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 convert­er during operation.

• Replace the outdoor power P.C. board.

20

9 times Not lighted

Bus-bar voltage
protection

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 out­door control P.C. board.

• Refer to 11-6.

"Check of bus-bar voltage".

21

11 times Not lighted

Low outside tempera­ture protection(cooling)

The ambient became -12°C or less.

—

OBH723D

91

No. Symptom

Indication

Abnormal point / Con-

dition

Condition Remedy

LED1(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 protec­tion

A short or open circuit is detected in the current
sensor during compressor operating.

• Replace the outdoor power P.C. board.

24

Lighted 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 con­trol P.C. board and outdoor power P.C. board.

25

Lighted 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 protec­tion

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 f lters are clogged.

• Check if refrigerant is short.

• Check if indoor/outdoor unit air circulation is short
cycled.

27

Twice Lighted

High pressure protec­tion

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".

29

4 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 pressure
protection

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 f lters are clogged.

• Check if refrigerant is short.

• Check if indoor/outdoor unit air circulation is short
cycled.

31

7 times Lighted

High Low
Pressure bypass
valve
Cooling 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 f lters are not clogged.

• Check there is suff 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
unit
operates
normally.

7 times Lighted

High Low
pressure bypass valve
High pressure protec­tion control at startup of
heating operation

MXZ-4E83VAHZ

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 valve
Compressor oil temper­ing control at startup of
heating operation

MXZ-4E83VAHZ

Both the following are true:

• The outside temperature is -2°C or less when the
heating operation is started.

• [(Discharge temperature) - (Indoor heat exchang­er temperature)] < 5°C

34

8 times Lighted

Cooling evaporating
temperature
protection

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

OFF

2.5-second OFF 2.5-second OFF

0.5-second ON 0.5-second ON

LED1

LED2

Lighted

Outdoor control P.C. board
(Parts side)

OBH723D

92

11-5. TROUBLE CRITERION OF MAIN PARTS

W

U

V

WHT

RED

BLK

LEV

WHT

RED

YLW

ORN

BLU

Linear expansion valve

37.4 Ω ~ 53.9 Ω

NormalColor of lead wire
WHT - RED
RED - ORN
YLW - RED

RED - BLU

High pressure switch
(HPS)

Pressure Normal

HPS

3.43 ± 0.15 MPa

4.41 ± 0.1 MPa

Open

Close

Discharge temperature
thermistor (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 exchanger
temperature 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.

0.83 Ω ~ 1.03 Ω0.63 Ω ~ 0.78 Ω0.86 Ω ~ 1.06 Ω

MXZ-3E54VA MXZ-3E68/4E72VA

MXZ-4E83/5E102VA

MXZ-2E53VAHZ

0.77 Ω ~ 0.95 Ω

MXZ-4E83VAHZ

Normal (Each phase)

MXZ-4E83/5E102VA

MXZ-2E53VAHZ

1.20 kΩ ~ 1.77 kΩ

MXZ-3E54/3E68/4E72VA

1.26 kΩ ~ 1.62 kΩ

MXZ-4E83VAHZ

1.24 kΩ ~ 1.86 kΩ

Normal (Each phase)

• Refer to 11-6. .

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

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

MXZ-3E54VA MXZ-3E68VA MXZ-4E72VA
MXZ-4E83VA MXZ-5E102VA MXZ-2E53VAHZ MXZ-4E83VAHZ

OBH723D

93

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 V AC in the
power supply terminal block?

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

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.

OBH723D

94

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-mode
recall function after checking.

No

No

Yes

No

Yes

Yes

Yes

No

Yes

Refer to indoor unit service manual.

Turn OFF the power supply.

Turn ON the power supply.

Is there rated voltage between
outdoor terminal block S1 and
S2?

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

Press EMERGENCY OPERATION switch once.

Check the power
supply.

A

Turn OFF the power supply.
Check once more if the indoor/outdoor
connecting wire is not miswiring.

Bridge the outdoor terminal block S2 and
S3.
1

B

Turn ON the power supply.

Check the wiring.

Correct them.

Turn OFF the power supply.
Remove the bridge between
outdoor terminal block S2 and S3.
Turn ON the power supply.
Is there amplitude of 10 to 20 V DC
between outdoor terminal block S2
and S3? <Confirmation of serial
signal>

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 the
indoor/outdoor connecting wire,
such as the damage of the wire,
intermediate connection, poor
contact to the terminal block?

Replace the
indoor/outdoor
connecting wire.

Is serial signal
error 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 status

Communication status is indicated
by the LED.

Blinking: normal communication
Lighting: abnormal communication or
not connected

Pattern 1 and 2 is repeatedly displayed
alternately. Each pattern is displayed for
10 seconds.

NOTE: "Lighting" in the table below does not
indicate abnormal communication.

Unit status

Outdoor control P.C. board

Blinking

LED1 LED2

LED3

LED 1 LED 3LED 2

Pattern

1

2

3

Unit B
status

Unit C
status

Unit A
status

Unit D

status
Unit E
status

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.

OBH723D

95

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 V AC between pin1
and pin2 at connector CN712?

Turn OFF the power supply.
Disconnect the connector CNAC2.

Replace the 4-way valve.

Replace the outdoor
control P.C. board.

Replace the R.V. coil.

Is there voltage 230 V AC
between the pin1 and pin3 at
connector CNAC?

Replace the outdoor
power P.C. board.

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 V AC between pin1 and
pin2 at connector CN712?

Replace the 4-way valve.

Replace the outdoor control P.C. board.

• When cooling operation does not work.

• When heating operation does not work.

CNAC
CN712

Outdoor control
P.C. board

CNAC2

Outdoor power
P.C. board

OBH723D

96

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 the outdoor control P.C. board.

Replace LEV coil.

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

• When heating, non-operating indoor unit gets warm.

CN791
CN792
CN793
CN794
CN795

Outdoor
control
P.C. board

OBH723D

97

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 lock
60 seconds to 5 minutes: refrigerant circuit defective
5 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.

Replace the outdoor power P.C. board.

1 • After the outdoor fan starts running, wait for 1 minute
or more before measuring the voltage.

• The output voltage values have the tolerance of ± 20%.
2 • The output differs depending on the capacity or the
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:

50V-250V
Is proper output voltage detected?
1, 2

No

No

Yes

Yes

Yes

No

Yes

No

OBH723D

98

Check of outdoor thermistors

• When thermistor is abnormal.

Thermistor
Defrost
Discharge temperature
Outdoor heat exchanger temperature
Ambient temperature
Fin temperature

Symbol

RT61
RT62
RT68
RT65
RT64

Connector, Pin No.
Between CNTH1 pin1 and pin2
Between CNTH1 pin3 and pin4
Between CNTH1 pin7 and pin8
Between CNTH2 pin1 and pin2
Between CN171 pin1 and pin2

Outdoor control P.C. board

Outdoor power P.C. board

Board

Normal

Yes

No

Abnormal

Disconnect 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 power
P.C. board since RT64 is combined with this board.

OBH723D

99

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.

Resistance

60 kΩ

160 kΩ

Measuring 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 - pin4

pin5 - pin4

pin6 - pin4

pin7 - pin4

Voltage

15 V DC

325 V DC

1 - 5 V DC

CNF1

pin1 - pin4

pin5 - pin4

pin6 - pin4

Is the voltage of connector CNF1
normal? (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.

Replace the outdoor control P.C. board.

Replace the outdoor control P.C. board.

Check of outdoor fan motor

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

CNF1

Outdoor control
P.C. board

OBH723D

100

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.

•Conf rm outdoor unit failure mode
recall function. (Refer to 11-2.2.)

Blink 5 times

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

Replace the outdoor power
P.C. board.

Blink 9 times

Replace the outdoor control
P.C. board.

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

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

Turn ON power supply. Start
operation.

Lighting

Replace the outdoor control
P.C. board.

Blink 9 times

Replace the outdoor power
P.C. board.

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

Turn ON power supply. Start
operation.

Normal

Lighting Lighting

Check of HPS

Infinity

0 Ω

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.

Replace the outdoor control P.C. board.

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 f 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 f ows into the indoor unit even while it is not operating.

OBH723D