Mitsubishi Electric MUZ-FH25VE - E1, MUZ-FH35VE - E1, MUZ-FH50VE - E1, MUZ-FH25VE, MUZ-FH35VE Service Manual

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Page 1

SERVICE MANUAL

CONTENTS

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

2. PART NAMES AND FUNCTIONS ····················· 3

3. SPECIFICATION ················································ 4

4. NOISE CRITERIA CURVES ······························ 7

5. OUTLINES AND DIMENSIONS ························ 8

6. WIRING DIAGRAM ············································ 9

7. REFRIGERANT SYSTEM DIAGRAM ··············11

8. PERFORMANCE CURVES ····························· 13

9. ACTUA TOR CONTROL ··································· 24

10. SERVICE FUNCTIONS ···································· 25

11. TROUBLESHOOTING ····································· 26

12. DISASSEMBLY INSTRUCTIONS ···················· 47

Models

SPLIT-TYPE AIR CONDITIONERS

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

HFC

utilized

R410A

No. OBH624

REVISED EDITION-A

OUTDOOR UNIT

Indoor unit service manual MSZ-FH•VE Series (OBH623)

PARTS CATALOG (OBB624)

MUZ-FH25VE

MUZ-FH35VE

MUZ-FH50VE

Please void OBH624.

Revision A:

•

MUZ-FH50VE- E1 has been added.

MUZ-FH25VE MUZ-FH35VE

Page 2

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.

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

touch the live parts.

Use the speciﬁ ed refrigerant 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:

•

MUZ-FH50VE-

has been added.

OBH624A

Page 3

MUZ-FH25VE -

MUZ-FH35VE -

MUZ-FH50VE -

1. New model

TECHNICAL CHANGES

Air outlet

Drain outlet

Piping

Drain hose

Air inlet

(back and side)

MUZ-FH25VE MUZ-FH35VE

PART NAMES AND FUNCTIONS

ACCESSORIES

Model

MUZ-FH25VE MUZ-FH35VE MUZ-FH50VE

Drain socket 1

MUZ-FH50VE

Piping

Air outlet

Drain outlet

Air inlet

(back and side)

Drain hose

OBH624A

Page 4

Outdoor model MUZ-FH25VE MUZ-FH35VE

Power supply Single phase, 230 V, 50 Hz

Capacity Rated frequency (Min.-Max.)

Cooling

2.5 (1.4 - 3.5) 3.5 (0.8 - 4.0)

Heating 3.2 (1.8 - 5.5) 4.0 (1.0 - 6.3)

Breaker Capacity A 10

Electrical data

Power input 1 (Total)

Cooling

485 820

Heating 580 800

Running current 1 (Total)

Cooling

2.6 3.9

Heating 2.9 3.8

Power factor 1 (Total)

Cooling

81 91

Heating 86 91

Starting current

1 (Total) A 2.9 3.9

Coefﬁ cient of performance (COP)

1 (Total)

Cooling 5.15 4.27 Heating 5.52 5.00

Compressor

Model SNB140FRUMT Output W 950

Current 1

Cooling

2.04 3.32

Heating 2.34 3.22

Refrigeration oil (Model) L 0.35 (FV50S)

Fan motor

Model RC0J50-CI Current 1

Cooling

0.28 0.30

Heating 0.28 0.30 Dimensions W × H × D mm 800 × 550 × 285 Weight kg 37

Special remarks

Dehumidiﬁ cation Cooling L/h 0.2 0.8

Air ﬂ ow 1

Cooling

High

m3/h

1,806

Low 1,038

Heating

High 2,016

Med. 1,710

Low 1,326

Sound level 1

Cooling

dB(A)

46 49

Heating 49 50

Fan speed

Cooling

High

rpm

810

Low 490

Heating

High 900

Med. 770

Low 610 Fan speed regulator 3 Refrigerant ﬁ lling capacity (R410A) kg 1.15

NOTE: Test conditions are based on ISO 5151. Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C Outdoor Dry-bulb temperature 35°C Heating: Indoor Dry-bulb temperature 20°C Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C Refrigerant piping length (one way): 5 m 1 Measured under rated operating frequency.

SPECIFICATION

OBH624A

Page 5

Outdoor model MUZ-FH50VE

Power supply Single phase, 230 V, 50 Hz

Capacity Rated frequency (Min. - Max.)

Cooling

5.0 (1.9 - 6.0)

Heating 6.0 (1.7 - 8.7)

Breaker Capacity A 16

Electrical data

Power input 1 (Total)

Cooling

1,380

Heating 1,480

Running current 1 (Total)

Cooling

6.1

Heating 6.5

Power factor

1 (Total)

Cooling

Heating 98

Starting current 1 (Total) A 6.5

Coefﬁ cient of performance (COP) 1 (Total)

Cooling 3.62

Heating 4.05

Compressor

Model SNB172FEKMT Output W 1,200

Current 1

Cooling

4.98

Heating 5.37

Refrigeration oil (Model) L 0.40(FV50S)

Fan motor

Model RC0J60-BC Current

Cooling

0.83

Heating 0.84 Dimensions W × H × D mm 840 × 880 × 330 Weight kg 55

Special remarks

Dehumidiﬁ cation Cooling L/h 2.0

Air ﬂ ow 1

Cooling

High

m3/h

3,006

Med. 3,006

Low 1,626

Heating

High 2,892 Med. 2,892

Low 2,280

Sound level 1

Cooling

dB(A)

Heating 54

Fan speed

Cooling

High

rpm

840

Med. 840

Low 480

Heating

High 810 Med. 810

Low 650 Fan speed regulator 3 Refrigerant ﬁ lling capacity (R410A) kg 1.55

OBH624A

Page 6

Speciﬁ cations and rated conditions of main electric parts

Model

Item

MUZ-FH25VE MUZ-FH35VE

Smoothing capacitor

(C61, C62) 600 μF/ 620 μF 420 V

Diode module (DB61) 15 A 600 V Fuse

(F61) T20AL250V

(F701, F801, F901)

T3.15AL250V

Power module

(IC700) 15 A 600 V (IC932) 8A600V

Expansion valve coil

(LEV) 12 V DC

Reactor (L61) 23 mH Power factor

controller

(IC820) 20A 600V

Circuit protection

(PTC64, PTC65) 33 Ω

Terminal block (TB) 5 P

Relay

(X63) 3 A 250 V (X64) 20 A 250 V (X69) 10A 230V

R.V.coil (21S4) 220 - 240 V AC

Speciﬁ cations and rated conditions of main electric parts

Model

Item

MUZ-FH50VE

Smoothing capacitor

(CB1, CB2, CB3)

560 μF 450 V

Fuse

(F601, F880, F901)

T3.15AL250 V

IGBT module

(IC932) 5 A 600 V (IC700) 20 A 600 V

Expansion valve coil

(LEV) 12 V DC

Reactor (L) 340 μH Diode module (IC820) 20 A 600 V Circuit

protection

(PTC64, PTC65) 33 Ω

Terminal block (TB1, TB2) 3 P

Relay

(X64) 20 A 250 V (X65) 20 A 250 V

(X69) 10 A 250 V (X601) 3 A 250 V (X602) 3 A 250 V

R.V. coil (21S4) 220 - 240 V AC

OBH624A

Page 7

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

COOLING

FUNCTION

SPL(dB(A)) LINE

HEATING

46 49

NC-10

MUZ-FH25VE

63 125 250 500 1000 2000 4000 8000

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

COOLING

FUNCTION

SPL(dB(A))

LINE

HEATING

49 50

NC-10

MUZ-FH35VE

NOISE CRITERIA CURVES

Test conditions Cooling: Dry-bulb temperature 35°C Heating: Dry-bulb temperature 7°C Wet-bulb temperature 6°C

OUTDOOR UNIT

MICROPHONE

1 m

MUZ-FH50VE

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

COOLING

FUNCTION

SPL(dB(A)) LINE

HEATING

NC-10

OBH624A

Page 8

800

302.5 500 Bolt pitch for installation

150

22.3

Handle

550

280

164.5

99.5

170.5

Service panel

Service port

285

344.5

400

Air in

Air out

Air in

17.5

Bolt pitch for

installation

304~325

Liquid refrigerant pipe joint Refrigerant pipe (flared) ø6.35

Gas refrigerant pipe joint Refrigerant pipe (flared) ø9.52

2 holes 10 X 21

REQUIRED SPACE

100 mm or more

350 mm or more

200 mm or more

100 mm or more

Drain hole ø42

Unit: mm

MUZ-FH25VE MUZ-FH35VE

OUTLINES AND DIMENSIONS

MUZ-FH50VE

417.5

Drain hole

175

500

330

Air in

Air out

2-holes 10 21

360

840

109

880

452

Service panel

99.5

164.5 195

Liquid refrigerant pipe joint Refrigerant pipe (flared)

Ø 6.35

Gas refrigerant pipe joint Refrigerant pipe (flared)

Ø 12.7

350 mm or more

100 mm or more

REQUIRED SPACE

500 mm or more

100 mm or more

500 mm or more

OBH624A

Page 9

WIRING DIAGRAM

MUZ-FH25VE MUZ-FH35VE

OBH624A

Page 10

MUZ-FH50VE

OBH624A

Page 11

Unit: mm

MUZ-FH25VE MUZ-FH35VE

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Discharge temperature thermistor RT62

Flared connection

Stop valve (with strainar)

Stop valve

Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe ø9.52 (with heat insulator)

Refrigerant pipe ø6.35 (with heat insulator)

R.V. coil heating ON cooling OFF

Strainer #100

LEV

Ambient temperature thermistor RT65

Muffler

Capillary tube ø4.0×ø2.4×240

Outdoor heat exchanger temperature thermistor RT68

Capillary tube ø3.0×ø2.0×210

Muffler

REFRIGERANT SYSTEM DIAGRAM

MUZ-FH50VE

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Discharge temperature thermistor RT62

Flared connection

Stop valve

Capillary tube

4.0

2.4×100 Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe

12.7

(with heat insulator)

Refrigerant pipe ø6.35 (with heat insulator)

LEV

Muffler

R.V. coil heating ON cooling OFF

Muffler

#100

Strainer

#100

Outdoor heat exchanger temperature thermistor RT68

Ambient temperature thermistor RT65

Strainer

#100

OBH624A

Page 12

Max. Length A

Max. Height

difference

Indoor unit

Outdoor unit

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

Model

Refrigerant piping: m Piping size O.D: mm

Max. Length A Max. Height difference B Gas Liquid

MUZ-FH25/35 20 12 9.52 6.35 MUZ-FH50 30 15 12.7 6.35

ADDITIONAL REFRIGERANT CHARGE (R410A: g)

Model

Outdoor unit

precharged

Refrigerant piping length (one way)

7 m 8 m 9 m 10 m 11 m 12 m 13 m 14 m 15 m 20 m

MUZ-FH25/35 1,150

0 30 60 90 120 150 180 210 240 390

Calculation: X g = 30 g/m × (Refrigerant piping length (m) - 7)

Model

Outdoor unit

precharged

Refrigerant piping length (one way)

7 m 10 m 15 m 20 m 25 m 30 m

MUZ-FH50 1,550 0 60 160 260 360 460

Calculation: X g = 20 g/m × (Refrigerant piping length (m) – 7)

OBH624A

Page 13

PERFORMANCE CURVES8

The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating conditions vary according to the areas where these units are installed, the following information has been 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: °C [WB]

}

Cooling

(2) Indoor outlet air wet-bulb temperature: °C [WB] (3) Outdoor intake air dry-bulb temperature: °C [DB] (4) Total input: W (5) Indoor intake air dry-bulb temperature: °C [DB]

}

Heating(6) Outdoor intake air wet-bulb temperature: °C [WB] (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.

MUZ-FH25VE MUZ-FH35VE MUZ-FH50VE

INDOOR UNIT

OUTDOOR UNIT

Wet and dry bulb thermometers FRONT VIEW

Wet and dry bulb thermometers BACK VIEW

Cooling capacity (

at Rated frequency)

0.9

1.0

1.1

1.2

1.3

1.4

1.5

-10-5 0 5 1015202530354045 Outdoor intake air Dry-bulb temperature(°C)

Capacity correction factors

20 18

Indoor intake air Wet-bulb temperature( )

MUZ-FH35VE

MUZ-FH25VE

Indoor air Wet-bulb temperature

difference (°C)

6.4

5.9

5.5

5.0

4.6

4.1

3.7

9.5

8.7

8.0

7.3

6.6

5.9

5.3

MUZ-FH50VE

13.6

12.5

11.4

10.3

9.3

8.3

7.3

8-1. CAPACITY AND INPUT CURVES

OBH624A

Page 14

NOTE: The above broken lines are for the heating operation without any frost and defrost operation.

0.8

0.9

1.0

1.1

1.2

1.3

-10-5 0 5 1015202530354045 Outdoor intake air Dry-bulb temperature (°C)

Input correction factors

22 20 18

Indoor intake air Wet-bulb temperature( )

Indoor air Wet-bulb temperature

difference (°C)

5.5

5.0

4.6

4.1

3.7

3.2

8.0

7.3

6.6

5.9

5.3

4.6

MUZ-FH35VE

11.4

10.3

9.3

8.3

7.3

6.4

MUZ-FH50VE

MUZ-FH25VE

Total input (Cooling :

at Rated frequency

)

Indoor air Dry-bulb temperature

difference (°C)

15.9

14.6

13.4

12.2

11.0

9.8

8.5

7.3

6.1

4.9

MUZ-FH25VE

19.8

18.3

16.8

15.2

13.7

12.2

10.7

9.1

7.6

6.1

MUZ-FH35VE

26.9

24.8

22.7

20.7

18.6

16.5

14.5

12.4

10.3

8.3

MUZ-FH50VE

Outdoor intake air Wet-bulb temperature (°C)

-15 -10 -5 0 5 10 15

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

Heating capacity (

at Rated frequency)

Capacity correction factor

Indoor intake air Dry-bulb temperature ( )

Indoor air Dry-bulb temperature

difference (°C)

15.9

14.6

13.4

12.2

11.0

9.8

8.5

7.3

6.1

4.9

MUZ-FH25VE

19.8

18.3

16.8

15.2

13.7

12.2

10.7

9.1

7.6

6.1

MUZ-FH35VE

26.9

24.8

22.7

20.7

18.6

16.5

14.5

12.4

10.3

8.3

MUZ-FH50VE

Outdoor intake air Wet-bulb temperature (°C)

-15 -10 -5 0 5 10 15

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

Total input (Heating :

at Rated frequency

)

Input correction factor

Indoor intake air Dry-bulb temperature ( )

OBH624A

Page 15

8-2. CAPACITY AND INPUT CORRECTION BY OPERATIONAL FREQUENCY OF COMPRESSOR

0 50 100

0.5

1.0

1.5

0 50 100

0.5

1.0

1.5

0 50 100

0.5

1.0

1.5

0 50 100

050100

150

0.5

1.0

1.5

2.0

0 50 100

150

0 50 100

150

0.5

1.0

1.5

2.0

0 50 100

150

MUZ-FH25VE

MUZ-FH35VE

Correction of Cooling capacity

The operational frequency of compressor (Hz)

Capacity correction factors

Correction of Cooling input

The operationalfrequency of compressor(Hz)

Input correction factors

Correction of Heating capacity

The operationalfrequency of compressor (Hz)

Capacity correction factors

Correction of Heating input

The operational frequency of compressor (Hz)

Input correction factors

Correction of Cooling capacity

The operational frequency of compressor (Hz)

Capacity correction factors

Correction of Cooling input

The operational frequency of compressor (Hz)

Input correction factors

Correction of Heatingcapacity

The operational frequency of compressor (Hz)

Capacity correction factors

Correction of Heatinginput

The operational frequency of compressor (Hz)

Input correction factors

Correction of Cooling capacity

Capacity correction factors

Correction of Cooling input

Input correction factors

Correction of Heating capacity

Capacity correction factors

MUZ-FH50VE

Correction of Heating input

Capacity correction factors

The operational frequency of compressor (Hz)

0 50 100

0.5

1.0

1.5

2.0

0 50 100

0.5

1.0

1.5

2.0

0 50 100 150

0.5

1.0

1.5

2.0

0 50 100 150

0.5

1.0

1.5

2.0

2.5

8-3. HOW TO OPERATE FIXED-FREQUENCY OPERATION

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 in COOL mode or 58 Hz in HEAT mode.

4. Indoor fan operates at High speed.

After 30 minutes, test run operation finishes and EMERGENCY OPERATION starts (operation frequency of compressor varies).

6. To cancel test run operation (EMERGENCY OPERATION), press EMERGENCY OPERATION switch or any button on remote controller.

OBH624A

Page 16

15 20 25 30 35

0.4

0.5

0.6

0.7

0.8

0.9

15 20 25 30 35

0.4

0.5

0.6

0.7

0.8

Ambient temperature(°C) Ambient humidity(%)

15 20 25 30 35

0.3

0.4

0.5

0.6

0.7

0.8

(kgf/cm2[Gauge])(MPa[Gauge])

(kgf/cm2[Gauge])(MPa [Gauge])

50 60 70

Ambient temperature(°C) Ambient humidity(%)

50 60 70

Ambient temperature(°C) Ambient humidity(%)

Outdoor low pressure

MUZ-FH25VE MUZ-FH35VE

MUZ-FH50VE

(kgf/cm2[Gauge])(MPa[Gauge])

50 60 70

COOL operation

Both indoor and outdoor unit are under the same temperature/

humidity condition.

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

8-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

Dry-bulb temperature (°C) Relative humidity (%)

20 50 25 60 30 70

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])

15 20502560307035

1.5

2.0

2.5

3.0

15 20502560307035

2.5

3.0

3.5

4.0

4.5

Ambient temperature (°C) Ambi

ent humidity(%)

Outdoor current (A)

Ambient temperature (°C) Ambient humidity(%)

Outdoor current (A)

MUZ-FH35VEMUZ-FH25VE

Outdoor unit current

15 20502560307035

MUZ-FH50VE

Ambient temperature (°C) Ambient humidity(%)

Outdoor current (A)

0510

15 20 25

4.0

4.5

5.0

5.5

6.0

0510

15 20 25

4.0

4.5

5.0

5.5

6.0

0 5 10 15 20 25

Ambient temperature (°C)

Outdoor current (A)

Ambient temperature (°C)

Outdoor current (A)

MUZ-FH35VEMUZ-FH25VE

Outdoor unit current

MUZ-FH50VE

Ambient temperature (°C)

Outdoor current (A)

Condition:

Operation: Test run operation (Refer to 8-3.)

HEAT operation

Indoor Outdoor

Dry bulb temperature (°C) 20.0 2 7 15 20.0

Wet bulb temperature (°C) 14.5 1 6 12 14.5

OBH624A

Page 17

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-FH25VE

CAPACITY: 2.5 kW SHF: 0.95 INPUT: 485 W

INDOOR

DB (°C)

INDOOR

WB (°C)

OUTDOOR DB (°C)

21 25 27 30

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 2.94 2.26 0.77 388 2.81 2.17 0.77 407 2.70 2.08 0.77 427 2.60 2.00 0.77 446 21 20 3.06 1.99 0.65 407 2.94 1.91 0.65 432 2.85 1.85 0.65 441 2.75 1.79 0.65 461 22 18 2.94 2.38 0.81 388 2.81 2.28 0.81 407 2.70 2.19 0.81 427 2.60 2.11 0.81 446 22 20 3.06 2.11 0.69 407 2.94 2.03 0.69 432 2.85 1.97 0.69 441 2.75 1.90 0.69 461 22 22 3.19 1.82 0.57 422 3.08 1.75 0.57 449 3.00 1.71 0.57 461 2.88 1.64 0.57 480 23 18 2.94 2.50 0.85 388 2.81 2.39 0.85 407 2.70 2.30 0.85 427 2.60 2.21 0.85 446 23 20 3.06 2.24 0.73 407 2.94 2.14 0.73 432 2.85 2.08 0.73 441 2.75 2.01 0.73 461 23 22 3.19 1.94 0.61 422 3.08 1.88 0.61 449 3.00 1.83 0.61 461 2.88 1.75 0.61 480 24 18 2.94 2.61 0.89 388 2.81 2.50 0.89 407 2.70 2.40 0.89 427 2.60 2.31 0.89 446 24 20 3.06 2.36 0.77 407 2.94 2.26 0.77 432 2.85 2.19 0.77 441 2.75 2.12 0.77 461 24 22 3.19 2.07 0.65 422 3.08 2.00 0.65 449 3.00 1.95 0.65 461 2.88 1.87 0.65 480 24 24 3.35 1.78 0.53 441 3.23 1.71 0.53 466 3.15 1.67 0.53 480 3.05 1.62 0.53 504 25 18 2.94 2.73 0.93 388 2.81 2.62 0.93 407 2.70 2.51 0.93 427 2.60 2.42 0.93 446 25 20 3.06 2.48 0.81 407 2.94 2.38 0.81 432 2.85 2.31 0.81 441 2.75 2.23 0.81 461 25 22 3.19 2.20 0.69 422 3.08 2.12 0.69 449 3.00 2.07 0.69 461 2.88 1.98 0.69 480 25 24 3.35 1.91 0.57 441 3.23 1.84 0.57 466 3.15 1.80 0.57 480 3.05 1.74 0.57 504 26 18 2.94 2.85 0.97 388 2.81 2.73 0.97 407 2.70 2.62 0.97 427 2.60 2.52 0.97 446 26 20 3.06 2.60 0.85 407 2.94 2.50 0.85 432 2.85 2.42 0.85 441 2.75 2.34 0.85 461 26 22 3.19 2.33 0.73 422 3.08 2.24 0.73 449 3.00 2.19 0.73 461 2.88 2.10 0.73 480 26 24 3.35 2.04 0.61 441 3.23 1.97 0.61 466 3.15 1.92 0.61 480 3.05 1.86 0.61 504 26 26 3.45 1.69 0.49 466 3.35 1.64 0.49 490 3.30 1.62 0.49 504 3.20 1.57 0.49 519 27 18 2.94 2.94 1.00 388 2.81 2.81 1.00 407 2.70 2.70 1.00 427 2.60 2.60 1.00 446 27 20 3.06 2.73 0.89 407 2.94 2.61 0.89 432 2.85 2.54 0.89 441 2.75 2.45 0.89 461 27 22 3.19 2.45 0.77 422 3.08 2.37 0.77 449 3.00 2.31 0.77 461 2.88 2.21 0.77 480 27 24 3.35 2.18 0.65 441 3.23 2.10 0.65 466 3.15 2.05 0.65 480 3.05 1.98 0.65 504 27 26 3.45 1.83 0.53 466 3.35 1.78 0.53 490 3.30 1.75 0.53 504 3.20 1.70 0.53 519 28 18 2.94 2.94 1.00 388 2.81 2.81 1.00 407 2.70 2.70 1.00 427 2.60 2.60 1.00 446 28 20 3.06 2.85 0.93 407 2.94 2.73 0.93 432 2.85 2.65 0.93 441 2.75 2.56 0.93 461 28 22 3.19 2.58 0.81 422 3.08 2.49 0.81 449 3.00 2.43 0.81 461 2.88 2.33 0.81 480 28 24 3.35 2.31 0.69 441 3.23 2.23 0.69 466 3.15 2.17 0.69 480 3.05 2.10 0.69 504 28 26 3.45 1.97 0.57 466 3.35 1.91 0.57 490 3.30 1.88 0.57 504 3.20 1.82 0.57 519 29 18 2.94 2.94 1.00 388 2.81 2.81 1.00 407 2.70 2.70 1.00 427 2.60 2.60 1.00 446 29 20 3.06 2.97 0.97 407 2.94 2.85 0.97 432 2.85 2.76 0.97 441 2.75 2.67 0.97 461 29 22 3.19 2.71 0.85 422 3.08 2.61 0.85 449 3.00 2.55 0.85 461 2.88 2.44 0.85 480 29 24 3.35 2.45 0.73 441 3.23 2.35 0.73 466 3.15 2.30 0.73 480 3.05 2.23 0.73 504 29 26 3.45 2.10 0.61 466 3.35 2.04 0.61 490 3.30 2.01 0.61 504 3.20 1.95 0.61 519 30 18 2.94 2.94 1.00 388 2.81 2.81 1.00 407 2.70 2.70 1.00 427 2.60 2.60 1.00 446 30 20 3.06 3.06 1.00 407 2.94 2.94 1.00 432 2.85 2.85 1.00 441 2.75 2.75 1.00 461 30 22 3.19 2.84 0.89 422 3.08 2.74 0.89 449 3.00 2.67 0.89 461 2.88 2.56 0.89 480 30 24 3.35 2.58 0.77 441 3.23 2.48 0.77 466 3.15 2.43 0.77 480 3.05 2.35 0.77 504 30 26 3.45 2.24 0.65 466 3.35 2.18 0.65 490 3.30 2.15 0.65 504 3.20 2.08 0.65 519 31 18 2.94 2.94 1.00 388 2.81 2.81 1.00 407 2.70 2.70 1.00 427 2.60 2.60 1.00 446 31 20 3.06 3.06 1.00 407 2.94 2.94 1.00 432 2.85 2.85 1.00 441 2.75 2.75 1.00 461 31 22 3.19 2.96 0.93 422 3.08 2.86 0.93 449 3.00 2.79 0.93 461 2.88 2.67 0.93 480 31 24 3.35 2.71 0.81 441 3.23 2.61 0.81 466 3.15 2.55 0.81 480 3.05 2.47 0.81 504 31 26 3.45 2.38 0.69 466 3.35 2.31 0.69 490 3.30 2.28 0.69 504 3.20 2.21 0.69 519 32 18 2.94 2.94 1.00 388 2.81 2.81 1.00 407 2.70 2.70 1.00 427 2.60 2.60 1.00 446 32 20 3.06 3.06 1.00 407 2.94 2.94 1.00 432 2.85 2.85 1.00 441 2.75 2.75 1.00 461 32 22 3.19 3.09 0.97 422 3.08 2.98 0.97 449 3.00 2.91 0.97 461 2.88 2.79 0.97 480 32 24 3.35 2.85 0.85 441 3.23 2.74 0.85 466 3.15 2.68 0.85 480 3.05 2.59 0.85 504 32 26 3.45 2.52 0.73 466 3.35 2.45 0.73 490 3.30 2.41 0.73 504 3.20 2.34 0.73 519

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

OBH624A

Page 18

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-FH25VE

CAPACITY: 2.5 kW SHF: 0.95 INPUT: 485 W

INDOOR

DB (°C)

INDOOR

WB (°C)

OUTDOOR DB (°C)

35 40 46

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 2.45 1.89 0.77 475 2.25 1.73 0.77 504 2.08 1.60 0.77 524 21 20 2.58 1.67 0.65 495 2.40 1.56 0.65 519 2.23 1.45 0.65 548 22 18 2.45 1.98 0.81 475 2.25 1.82 0.81 504 2.08 1.68 0.81 524 22 20 2.58 1.78 0.69 495 2.40 1.66 0.69 519 2.23 1.54 0.69 548 22 22 2.73 1.55 0.57 514 2.55 1.45 0.57 543 2.38 1.35 0.57 563 23 18 2.45 2.08 0.85 475 2.25 1.91 0.85 504 2.08 1.76 0.85 524 23 20 2.58 1.88 0.73 495 2.40 1.75 0.73 519 2.23 1.62 0.73 548 23 22 2.73 1.66 0.61 514 2.55 1.56 0.61 543 2.38 1.45 0.61 563 24 18 2.45 2.18 0.89 475 2.25 2.00 0.89 504 2.08 1.85 0.89 524 24 20 2.58 1.98 0.77 495 2.40 1.85 0.77 519 2.23 1.71 0.77 548 24 22 2.73 1.77 0.65 514 2.55 1.66 0.65 543 2.38 1.54 0.65 563 24 24 2.88 1.52 0.53 534 2.70 1.43 0.53 558 2.55 1.35 0.53 582 25 18 2.45 2.28 0.93 475 2.25 2.09 0.93 504 2.08 1.93 0.93 524 25 20 2.58 2.09 0.81 495 2.40 1.94 0.81 519 2.23 1.80 0.81 548 25 22 2.73 1.88 0.69 514 2.55 1.76 0.69 543 2.38 1.64 0.69 563 25 24 2.88 1.64 0.57 534 2.70 1.54 0.57 558 2.55 1.45 0.57 582 26 18 2.45 2.38 0.97 475 2.25 2.18 0.97 504 2.08 2.01 0.97 524 26 20 2.58 2.19 0.85 495 2.40 2.04 0.85 519 2.23 1.89 0.85 548 26 22 2.73 1.99 0.73 514 2.55 1.86 0.73 543 2.38 1.73 0.73 563 26 24 2.88 1.75 0.61 534 2.70 1.65 0.61 558 2.55 1.56 0.61 582 26 26 3.03 1.48 0.49 553 2.85 1.40 0.49 577 2.68 1.31 0.49 601 27 18 2.45 2.45 1.00 475 2.25 2.25 1.00 504 2.08 2.08 1.00 524 27 20 2.58 2.29 0.89 495 2.40 2.14 0.89 519 2.23 1.98 0.89 548 27 22 2.73 2.10 0.77 514 2.55 1.96 0.77 543 2.38 1.83 0.77 563 27 24 2.88 1.87 0.65 534 2.70 1.76 0.65 558 2.55 1.66 0.65 582 27 26 3.03 1.60 0.53 553 2.85 1.51 0.53 577 2.68 1.42 0.53 601 28 18 2.45 2.45 1.00 475 2.25 2.25 1.00 504 2.08 2.08 1.00 524 28 20 2.58 2.39 0.93 495 2.40 2.23 0.93 519 2.23 2.07 0.93 548 28 22 2.73 2.21 0.81 514 2.55 2.07 0.81 543 2.38 1.92 0.81 563 28 24 2.88 1.98 0.69 534 2.70 1.86 0.69 558 2.55 1.76 0.69 582 28 26 3.03 1.72 0.57 553 2.85 1.62 0.57 577 2.68 1.52 0.57 601 29 18 2.45 2.45 1.00 475 2.25 2.25 1.00 504 2.08 2.08 1.00 524 29 20 2.58 2.50 0.97 495 2.40 2.33 0.97 519 2.23 2.16 0.97 548 29 22 2.73 2.32 0.85 514 2.55 2.17 0.85 543 2.38 2.02 0.85 563 29 24 2.88 2.10 0.73 534 2.70 1.97 0.73 558 2.55 1.86 0.73 582 29 26 3.03 1.85 0.61 553 2.85 1.74 0.61 577 2.68 1.63 0.61 601 30 18 2.45 2.45 1.00 475 2.25 2.25 1.00 504 2.08 2.08 1.00 524 30 20 2.58 2.58 1.00 495 2.40 2.40 1.00 519 2.23 2.23 1.00 548 30 22 2.73 2.43 0.89 514 2.55 2.27 0.89 543 2.38 2.11 0.89 563 30 24 2.88 2.21 0.77 534 2.70 2.08 0.77 558 2.55 1.96 0.77 582 30 26 3.03 1.97 0.65 553 2.85 1.85 0.65 577 2.68 1.74 0.65 601 31 18 2.45 2.45 1.00 475 2.25 2.25 1.00 504 2.08 2.08 1.00 524 31 20 2.58 2.58 1.00 495 2.40 2.40 1.00 519 2.23 2.23 1.00 548 31 22 2.73 2.53 0.93 514 2.55 2.37 0.93 543 2.38 2.21 0.93 563 31 24 2.88 2.33 0.81 534 2.70 2.19 0.81 558 2.55 2.07 0.81 582 31 26 3.03 2.09 0.69 553 2.85 1.97 0.69 577 2.68 1.85 0.69 601 32 18 2.45 2.45 1.00 475 2.25 2.25 1.00 504 2.08 2.08 1.00 524 32 20 2.58 2.58 1.00 495 2.40 2.40 1.00 519 2.23 2.23 1.00 548 32 22 2.73 2.64 0.97 514 2.55 2.47 0.97 543 2.38 2.30 0.97 563 32 24 2.88 2.44 0.85 534 2.70 2.30 0.85 558 2.55 2.17 0.85 582 32 26 3.03 2.21 0.73 553 2.85 2.08 0.73 577 2.68 1.95 0.73 601

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

OBH624A

Page 19

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-FH35VE

CAPACITY: 3.5 kW SHF: 0.84 INPUT: 820 W

INDOOR

DB (°C)

INDOOR

WB (°C)

OUTDOOR DB (°C)

21 25 27 30

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 4.11 2.71 0.66 656 3.94 2.60 0.66 689 3.78 2.49 0.66 722 3.64 2.40 0.66 754 21 20 4.29 2.32 0.54 689 4.11 2.22 0.54 730 3.99 2.15 0.54 746 3.85 2.08 0.54 779 22 18 4.11 2.88 0.70 656 3.94 2.76 0.70 689 3.78 2.65 0.70 722 3.64 2.55 0.70 754 22 20 4.29 2.49 0.58 689 4.11 2.39 0.58 730 3.99 2.31 0.58 746 3.85 2.23 0.58 779 22 22 4.46 2.05 0.46 713 4.31 1.98 0.46 759 4.20 1.93 0.46 779 4.03 1.85 0.46 812 23 18 4.11 3.04 0.74 656 3.94 2.91 0.74 689 3.78 2.80 0.74 722 3.64 2.69 0.74 754 23 20 4.29 2.66 0.62 689 4.11 2.55 0.62 730 3.99 2.47 0.62 746 3.85 2.39 0.62 779 23 22 4.46 2.23 0.50 713 4.31 2.15 0.50 759 4.20 2.10 0.50 779 4.03 2.01 0.50 812 24 18 4.11 3.21 0.78 656 3.94 3.07 0.78 689 3.78 2.95 0.78 722 3.64 2.84 0.78 754 24 20 4.29 2.83 0.66 689 4.11 2.71 0.66 730 3.99 2.63 0.66 746 3.85 2.54 0.66 779 24 22 4.46 2.41 0.54 713 4.31 2.32 0.54 759 4.20 2.27 0.54 779 4.03 2.17 0.54 812 24 24 4.69 1.97 0.42 746 4.52 1.90 0.42 787 4.41 1.85 0.42 812 4.27 1.79 0.42 853 25 18 4.11 3.37 0.82 656 3.94 3.23 0.82 689 3.78 3.10 0.82 722 3.64 2.98 0.82 754 25 20 4.29 3.00 0.70 689 4.11 2.88 0.70 730 3.99 2.79 0.70 746 3.85 2.70 0.70 779 25 22 4.46 2.59 0.58 713 4.31 2.50 0.58 759 4.20 2.44 0.58 779 4.03 2.33 0.58 812 25 24 4.69 2.16 0.46 746 4.52 2.08 0.46 787 4.41 2.03 0.46 812 4.27 1.96 0.46 853 26 18 4.11 3.54 0.86 656 3.94 3.39 0.86 689 3.78 3.25 0.86 722 3.64 3.13 0.86 754 26 20 4.29 3.17 0.74 689 4.11 3.04 0.74 730 3.99 2.95 0.74 746 3.85 2.85 0.74 779 26 22 4.46 2.77 0.62 713 4.31 2.67 0.62 759 4.20 2.60 0.62 779 4.03 2.50 0.62 812 26 24 4.69 2.35 0.50 746 4.52 2.26 0.50 787 4.41 2.21 0.50 812 4.27 2.14 0.50 853 26 26 4.83 1.84 0.38 787 4.69 1.78 0.38 828 4.62 1.76 0.38 853 4.48 1.70 0.38 877 27 18 4.11 3.70 0.90 656 3.94 3.54 0.90 689 3.78 3.40 0.90 722 3.64 3.28 0.90 754 27 20 4.29 3.34 0.78 689 4.11 3.21 0.78 730 3.99 3.11 0.78 746 3.85 3.00 0.78 779 27 22 4.46 2.95 0.66 713 4.31 2.84 0.66 759 4.20 2.77 0.66 779 4.03 2.66 0.66 812 27 24 4.69 2.53 0.54 746 4.52 2.44 0.54 787 4.41 2.38 0.54 812 4.27 2.31 0.54 853 27 26 4.83 2.03 0.42 787 4.69 1.97 0.42 828 4.62 1.94 0.42 853 4.48 1.88 0.42 877 28 18 4.11 3.87 0.94 656 3.94 3.70 0.94 689 3.78 3.55 0.94 722 3.64 3.42 0.94 754 28 20 4.29 3.52 0.82 689 4.11 3.37 0.82 730 3.99 3.27 0.82 746 3.85 3.16 0.82 779 28 22 4.46 3.12 0.70 713 4.31 3.01 0.70 759 4.20 2.94 0.70 779 4.03 2.82 0.70 812 28 24 4.69 2.72 0.58 746 4.52 2.62 0.58 787 4.41 2.56 0.58 812 4.27 2.48 0.58 853 28 26 4.83 2.22 0.46 787 4.69 2.16 0.46 828 4.62 2.13 0.46 853 4.48 2.06 0.46 877 29 18 4.11 4.03 0.98 656 3.94 3.86 0.98 689 3.78 3.70 0.98 722 3.64 3.57 0.98 754 29 20 4.29 3.69 0.86 689 4.11 3.54 0.86 730 3.99 3.43 0.86 746 3.85 3.31 0.86 779 29 22 4.46 3.30 0.74 713 4.31 3.19 0.74 759 4.20 3.11 0.74 779 4.03 2.98 0.74 812 29 24 4.69 2.91 0.62 746 4.52 2.80 0.62 787 4.41 2.73 0.62 812 4.27 2.65 0.62 853 29 26 4.83 2.42 0.50 787 4.69 2.35 0.50 828 4.62 2.31 0.50 853 4.48 2.24 0.50 877 30 18 4.11 4.11 1.00 656 3.94 3.94 1.00 689 3.78 3.78 1.00 722 3.64 3.64 1.00 754 30 20 4.29 3.86 0.90 689 4.11 3.70 0.90 730 3.99 3.59 0.90 746 3.85 3.47 0.90 779 30 22 4.46 3.48 0.78 713 4.31 3.36 0.78 759 4.20 3.28 0.78 779 4.03 3.14 0.78 812 30 24 4.69 3.10 0.66 746 4.52 2.98 0.66 787 4.41 2.91 0.66 812 4.27 2.82 0.66 853 30 26 4.83 2.61 0.54 787 4.69 2.53 0.54 828 4.62 2.49 0.54 853 4.48 2.42 0.54 877 31 18 4.11 4.11 1.00 656 3.94 3.94 1.00 689 3.78 3.78 1.00 722 3.64 3.64 1.00 754 31 20 4.29 4.03 0.94 689 4.11 3.87 0.94 730 3.99 3.75 0.94 746 3.85 3.62 0.94 779 31 22 4.46 3.66 0.82 713 4.31 3.53 0.82 759 4.20 3.44 0.82 779 4.03 3.30 0.82 812 31 24 4.69 3.28 0.70 746 4.52 3.16 0.70 787 4.41 3.09 0.70 812 4.27 2.99 0.70 853 31 26 4.83 2.80 0.58 787 4.69 2.72 0.58 828 4.62 2.68 0.58 853 4.48 2.60 0.58 877 32 18 4.11 4.11 1.00 656 3.94 3.94 1.00 689 3.78 3.78 1.00 722 3.64 3.64 1.00 754 32 20 4.29 4.20 0.98 689 4.11 4.03 0.98 730 3.99 3.91 0.98 746 3.85 3.77 0.98 779 32 22 4.46 3.84 0.86 713 4.31 3.70 0.86 759 4.20 3.61 0.86 779 4.03 3.46 0.86 812 32 24 4.69 3.47 0.74 746 4.52 3.34 0.74 787 4.41 3.26 0.74 812 4.27 3.16 0.74 853 32 26 4.83 2.99 0.62 787 4.69 2.91 0.62 828 4.62 2.86 0.62 853 4.48 2.78 0.62 877

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

OBH624A

Page 20

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-FH35VE

CAPACITY: 3.5 kW SHF: 0.84 INPUT: 820 W

INDOOR

DB (°C)

INDOOR

WB (°C)

OUTDOOR DB (°C)

35 40 46

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 3.43 2.26 0.66 804 3.15 2.08 0.66 853 2.91 1.92 0.66 886 21 20 3.61 1.95 0.54 836 3.36 1.81 0.54 877 3.12 1.68 0.54 927 22 18 3.43 2.40 0.70 804 3.15 2.21 0.70 853 2.91 2.03 0.70 886 22 20 3.61 2.09 0.58 836 3.36 1.95 0.58 877 3.12 1.81 0.58 927 22 22 3.82 1.75 0.46 869 3.57 1.64 0.46 918 3.33 1.53 0.46 951 23 18 3.43 2.54 0.74 804 3.15 2.33 0.74 853 2.91 2.15 0.74 886 23 20 3.61 2.24 0.62 836 3.36 2.08 0.62 877 3.12 1.93 0.62 927 23 22 3.82 1.91 0.50 869 3.57 1.79 0.50 918 3.33 1.66 0.50 951 24 18 3.43 2.68 0.78 804 3.15 2.46 0.78 853 2.91 2.27 0.78 886 24 20 3.61 2.38 0.66 836 3.36 2.22 0.66 877 3.12 2.06 0.66 927 24 22 3.82 2.06 0.54 869 3.57 1.93 0.54 918 3.33 1.80 0.54 951 24 24 4.03 1.69 0.42 902 3.78 1.59 0.42 943 3.57 1.50 0.42 984 25 18 3.43 2.81 0.82 804 3.15 2.58 0.82 853 2.91 2.38 0.82 886 25 20 3.61 2.52 0.70 836 3.36 2.35 0.70 877 3.12 2.18 0.70 927 25 22 3.82 2.21 0.58 869 3.57 2.07 0.58 918 3.33 1.93 0.58 951 25 24 4.03 1.85 0.46 902 3.78 1.74 0.46 943 3.57 1.64 0.46 984 26 18 3.43 2.95 0.86 804 3.15 2.71 0.86 853 2.91 2.50 0.86 886 26 20 3.61 2.67 0.74 836 3.36 2.49 0.74 877 3.12 2.31 0.74 927 26 22 3.82 2.37 0.62 869 3.57 2.21 0.62 918 3.33 2.06 0.62 951 26 24 4.03 2.01 0.50 902 3.78 1.89 0.50 943 3.57 1.79 0.50 984 26 26 4.24 1.61 0.38 935 3.99 1.52 0.38 976 3.75 1.42 0.38 1017 27 18 3.43 3.09 0.90 804 3.15 2.84 0.90 853 2.91 2.61 0.90 886 27 20 3.61 2.81 0.78 836 3.36 2.62 0.78 877 3.12 2.43 0.78 927 27 22 3.82 2.52 0.66 869 3.57 2.36 0.66 918 3.33 2.19 0.66 951 27 24 4.03 2.17 0.54 902 3.78 2.04 0.54 943 3.57 1.93 0.54 984 27 26 4.24 1.78 0.42 935 3.99 1.68 0.42 976 3.75 1.57 0.42 1017 28 18 3.43 3.22 0.94 804 3.15 2.96 0.94 853 2.91 2.73 0.94 886 28 20 3.61 2.96 0.82 836 3.36 2.76 0.82 877 3.12 2.55 0.82 927 28 22 3.82 2.67 0.70 869 3.57 2.50 0.70 918 3.33 2.33 0.70 951 28 24 4.03 2.33 0.58 902 3.78 2.19 0.58 943 3.57 2.07 0.58 984 28 26 4.24 1.95 0.46 935 3.99 1.84 0.46 976 3.75 1.72 0.46 1017 29 18 3.43 3.36 0.98 804 3.15 3.09 0.98 853 2.91 2.85 0.98 886 29 20 3.61 3.10 0.86 836 3.36 2.89 0.86 877 3.12 2.68 0.86 927 29 22 3.82 2.82 0.74 869 3.57 2.64 0.74 918 3.33 2.46 0.74 951 29 24 4.03 2.50 0.62 902 3.78 2.34 0.62 943 3.57 2.21 0.62 984 29 26 4.24 2.12 0.50 935 3.99 2.00 0.50 976 3.75 1.87 0.50 1017 30 18 3.43 3.43 1.00 804 3.15 3.15 1.00 853 2.91 2.91 1.00 886 30 20 3.61 3.24 0.90 836 3.36 3.02 0.90 877 3.12 2.80 0.90 927 30 22 3.82 2.98 0.78 869 3.57 2.78 0.78 918 3.33 2.59 0.78 951 30 24 4.03 2.66 0.66 902 3.78 2.49 0.66 943 3.57 2.36 0.66 984 30 26 4.24 2.29 0.54 935 3.99 2.15 0.54 976 3.75 2.02 0.54 1017 31 18 3.43 3.43 1.00 804 3.15 3.15 1.00 853 2.91 2.91 1.00 886 31 20 3.61 3.39 0.94 836 3.36 3.16 0.94 877 3.12 2.93 0.94 927 31 22 3.82 3.13 0.82 869 3.57 2.93 0.82 918 3.33 2.73 0.82 951 31 24 4.03 2.82 0.70 902 3.78 2.65 0.70 943 3.57 2.50 0.70 984 31 26 4.24 2.46 0.58 935 3.99 2.31 0.58 976 3.75 2.17 0.58 1017 32 18 3.43 3.43 1.00 804 3.15 3.15 1.00 853 2.91 2.91 1.00 886 32 20 3.61 3.53 0.98 836 3.36 3.29 0.98 877 3.12 3.05 0.98 927 32 22 3.82 3.28 0.86 869 3.57 3.07 0.86 918 3.33 2.86 0.86 951 32 24 4.03 2.98 0.74 902 3.78 2.80 0.74 943 3.57 2.64 0.74 984 32 26 4.24 2.63 0.62 935 3.99 2.47 0.62 976 3.75 2.32 0.62 1017

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

OBH624A

Page 21

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-FH50VE

CAPACITY: 5.0 kW SHF: 0.73 INPUT: 1380 W

INDOOR

DB (°C)

INDOOR

WB (°C)

OUTDOOR DB (°C)

21 25 27 30

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 5.88 3.23 0.55 1104 5.63 3.09 0.55 1159 5.40 2.97 0.55 1214 5.20 2.86 0.55 1270 21 20 6.13 2.63 0.43 1159 5.88 2.53 0.43 1228 5.70 2.45 0.43 1256 5.50 2.37 0.43 1311 22 18 5.88 3.47 0.59 1104 5.63 3.32 0.59 1159 5.40 3.19 0.59 1214 5.20 3.07 0.59 1270 22 20 6.13 2.88 0.47 1159 5.88 2.76 0.47 1228 5.70 2.68 0.47 1256 5.50 2.59 0.47 1311 22 22 6.38 2.23 0.35 1201 6.15 2.15 0.35 1277 6.00 2.10 0.35 1311 5.75 2.01 0.35 1366 23 18 5.88 3.70 0.63 1104 5.63 3.54 0.63 1159 5.40 3.40 0.63 1214 5.20 3.28 0.63 1270 23 20 6.13 3.12 0.51 1159 5.88 3.00 0.51 1228 5.70 2.91 0.51 1256 5.50 2.81 0.51 1311 23 22 6.38 2.49 0.39 1201 6.15 2.40 0.39 1277 6.00 2.34 0.39 1311 5.75 2.24 0.39 1366 24 18 5.88 3.94 0.67 1104 5.63 3.77 0.67 1159 5.40 3.62 0.67 1214 5.20 3.48 0.67 1270 24 20 6.13 3.37 0.55 1159 5.88 3.23 0.55 1228 5.70 3.14 0.55 1256 5.50 3.03 0.55 1311 24 22 6.38 2.74 0.43 1201 6.15 2.64 0.43 1277 6.00 2.58 0.43 1311 5.75 2.47 0.43 1366 24 24 6.70 2.08 0.31 1256 6.45 2.00 0.31 1325 6.30 1.95 0.31 1366 6.10 1.89 0.31 1435 25 18 5.88 4.17 0.71 1104 5.63 3.99 0.71 1159 5.40 3.83 0.71 1214 5.20 3.69 0.71 1270 25 20 6.13 3.61 0.59 1159 5.88 3.47 0.59 1228 5.70 3.36 0.59 1256 5.50 3.25 0.59 1311 25 22 6.38 3.00 0.47 1201 6.15 2.89 0.47 1277 6.00 2.82 0.47 1311 5.75 2.70 0.47 1366 25 24 6.70 2.35 0.35 1256 6.45 2.26 0.35 1325 6.30 2.21 0.35 1366 6.10 2.14 0.35 1435 26 18 5.88 4.41 0.75 1104 5.63 4.22 0.75 1159 5.40 4.05 0.75 1214 5.20 3.90 0.75 1270 26 20 6.13 3.86 0.63 1159 5.88 3.70 0.63 1228 5.70 3.59 0.63 1256 5.50 3.47 0.63 1311 26 22 6.38 3.25 0.51 1201 6.15 3.14 0.51 1277 6.00 3.06 0.51 1311 5.75 2.93 0.51 1366 26 24 6.70 2.61 0.39 1256 6.45 2.52 0.39 1325 6.30 2.46 0.39 1366 6.10 2.38 0.39 1435 26 26 6.90 1.86 0.27 1325 6.70 1.81 0.27 1394 6.60 1.78 0.27 1435 6.40 1.73 0.27 1477 27 18 5.88 4.64 0.79 1104 5.63 4.44 0.79 1159 5.40 4.27 0.79 1214 5.20 4.11 0.79 1270 27 20 6.13 4.10 0.67 1159 5.88 3.94 0.67 1228 5.70 3.82 0.67 1256 5.50 3.69 0.67 1311 27 22 6.38 3.51 0.55 1201 6.15 3.38 0.55 1277 6.00 3.30 0.55 1311 5.75 3.16 0.55 1366 27 24 6.70 2.88 0.43 1256 6.45 2.77 0.43 1325 6.30 2.71 0.43 1366 6.10 2.62 0.43 1435 27 26 6.90 2.14 0.31 1325 6.70 2.08 0.31 1394 6.60 2.05 0.31 1435 6.40 1.98 0.31 1477 28 18 5.88 4.88 0.83 1104 5.63 4.67 0.83 1159 5.40 4.48 0.83 1214 5.20 4.32 0.83 1270 28 20 6.13 4.35 0.71 1159 5.88 4.17 0.71 1228 5.70 4.05 0.71 1256 5.50 3.91 0.71 1311 28 22 6.38 3.76 0.59 1201 6.15 3.63 0.59 1277 6.00 3.54 0.59 1311 5.75 3.39 0.59 1366 28 24 6.70 3.15 0.47 1256 6.45 3.03 0.47 1325 6.30 2.96 0.47 1366 6.10 2.87 0.47 1435 28 26 6.90 2.42 0.35 1325 6.70 2.35 0.35 1394 6.60 2.31 0.35 1435 6.40 2.24 0.35 1477 29 18 5.88 5.11 0.87 1104 5.63 4.89 0.87 1159 5.40 4.70 0.87 1214 5.20 4.52 0.87 1270 29 20 6.13 4.59 0.75 1159 5.88 4.41 0.75 1228 5.70 4.28 0.75 1256 5.50 4.13 0.75 1311 29 22 6.38 4.02 0.63 1201 6.15 3.87 0.63 1277 6.00 3.78 0.63 1311 5.75 3.62 0.63 1366 29 24 6.70 3.42 0.51 1256 6.45 3.29 0.51 1325 6.30 3.21 0.51 1366 6.10 3.11 0.51 1435 29 26 6.90 2.69 0.39 1325 6.70 2.61 0.39 1394 6.60 2.57 0.39 1435 6.40 2.50 0.39 1477 30 18 5.88 5.35 0.91 1104 5.63 5.12 0.91 1159 5.40 4.91 0.91 1214 5.20 4.73 0.91 1270 30 20 6.13 4.84 0.79 1159 5.88 4.64 0.79 1228 5.70 4.50 0.79 1256 5.50 4.35 0.79 1311 30 22 6.38 4.27 0.67 1201 6.15 4.12 0.67 1277 6.00 4.02 0.67 1311 5.75 3.85 0.67 1366 30 24 6.70 3.69 0.55 1256 6.45 3.55 0.55 1325 6.30 3.47 0.55 1366 6.10 3.36 0.55 1435 30 26 6.90 2.97 0.43 1325 6.70 2.88 0.43 1394 6.60 2.84 0.43 1435 6.40 2.75 0.43 1477 31 18 5.88 5.58 0.95 1104 5.63 5.34 0.95 1159 5.40 5.13 0.95 1214 5.20 4.94 0.95 1270 31 20 6.13 5.08 0.83 1159 5.88 4.88 0.83 1228 5.70 4.73 0.83 1256 5.50 4.57 0.83 1311 31 22 6.38 4.53 0.71 1201 6.15 4.37 0.71 1277 6.00 4.26 0.71 1311 5.75 4.08 0.71 1366 31 24 6.70 3.95 0.59 1256 6.45 3.81 0.59 1325 6.30 3.72 0.59 1366 6.10 3.60 0.59 1435 31 26 6.90 3.24 0.47 1325 6.70 3.15 0.47 1394 6.60 3.10 0.47 1435 6.40 3.01 0.47 1477 32 18 5.88 5.82 0.99 1104 5.63 5.57 0.99 1159 5.40 5.35 0.99 1214 5.20 5.15 0.99 1270 32 20 6.13 5.33 0.87 1159 5.88 5.11 0.87 1228 5.70 4.96 0.87 1256 5.50 4.79 0.87 1311 32 22 6.38 4.78 0.75 1201 6.15 4.61 0.75 1277 6.00 4.50 0.75 1311 5.75 4.31 0.75 1366 32 24 6.70 4.22 0.63 1256 6.45 4.06 0.63 1325 6.30 3.97 0.63 1366 6.10 3.84 0.63 1435 32 26 6.90 3.52 0.51 1325 6.70 3.42 0.51 1394 6.60 3.37 0.51 1435 6.40 3.26 0.51 1477

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

OBH624A

Page 22

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-FH50VE

CAPACITY: 5.0 kW SHF: 0.73 INPUT: 1380 W

INDOOR

DB (°C)

INDOOR

WB (°C)

OUTDOOR DB (°C)

35 40 46

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT 21 18 4.90 2.70 0.55 1352 4.50 2.48 0.55 1435 4.15 2.28 0.55 1490 21 20 5.15 2.21 0.43 1408 4.80 2.06 0.43 1477 4.45 1.91 0.43 1559 22 18 4.90 2.89 0.59 1352 4.50 2.66 0.59 1435 4.15 2.45 0.59 1490 22 20 5.15 2.42 0.47 1408 4.80 2.26 0.47 1477 4.45 2.09 0.47 1559 22 22 5.45 1.91 0.35 1463 5.10 1.79 0.35 1546 4.75 1.66 0.35 1601 23 18 4.90 3.09 0.63 1352 4.50 2.84 0.63 1435 4.15 2.61 0.63 1490 23 20 5.15 2.63 0.51 1408 4.80 2.45 0.51 1477 4.45 2.27 0.51 1559 23 22 5.45 2.13 0.39 1463 5.10 1.99 0.39 1546 4.75 1.85 0.39 1601 24 18 4.90 3.28 0.67 1352 4.50 3.02 0.67 1435 4.15 2.78 0.67 1490 24 20 5.15 2.83 0.55 1408 4.80 2.64 0.55 1477 4.45 2.45 0.55 1559 24 22 5.45 2.34 0.43 1463 5.10 2.19 0.43 1546 4.75 2.04 0.43 1601 24 24 5.75 1.78 0.31 1518 5.40 1.67 0.31 1587 5.10 1.58 0.31 1656 25 18 4.90 3.48 0.71 1352 4.50 3.20 0.71 1435 4.15 2.95 0.71 1490 25 20 5.15 3.04 0.59 1408 4.80 2.83 0.59 1477 4.45 2.63 0.59 1559 25 22 5.45 2.56 0.47 1463 5.10 2.40 0.47 1546 4.75 2.23 0.47 1601 25 24 5.75 2.01 0.35 1518 5.40 1.89 0.35 1587 5.10 1.79 0.35 1656 26 18 4.90 3.68 0.75 1352 4.50 3.38 0.75 1435 4.15 3.11 0.75 1490 26 20 5.15 3.24 0.63 1408 4.80 3.02 0.63 1477 4.45 2.80 0.63 1559 26 22 5.45 2.78 0.51 1463 5.10 2.60 0.51 1546 4.75 2.42 0.51 1601 26 24 5.75 2.24 0.39 1518 5.40 2.11 0.39 1587 5.10 1.99 0.39 1656 26 26 6.05 1.63 0.27 1573 5.70 1.54 0.27 1642 5.35 1.44 0.27 1711 27 18 4.90 3.87 0.79 1352 4.50 3.56 0.79 1435 4.15 3.28 0.79 1490 27 20 5.15 3.45 0.67 1408 4.80 3.22 0.67 1477 4.45 2.98 0.67 1559 27 22 5.45 3.00 0.55 1463 5.10 2.81 0.55 1546 4.75 2.61 0.55 1601 27 24 5.75 2.47 0.43 1518 5.40 2.32 0.43 1587 5.10 2.19 0.43 1656 27 26 6.05 1.88 0.31 1573 5.70 1.77 0.31 1642 5.35 1.66 0.31 1711 28 18 4.90 4.07 0.83 1352 4.50 3.74 0.83 1435 4.15 3.44 0.83 1490 28 20 5.15 3.66 0.71 1408 4.80 3.41 0.71 1477 4.45 3.16 0.71 1559 28 22 5.45 3.22 0.59 1463 5.10 3.01 0.59 1546 4.75 2.80 0.59 1601 28 24 5.75 2.70 0.47 1518 5.40 2.54 0.47 1587 5.10 2.40 0.47 1656 28 26 6.05 2.12 0.35 1573 5.70 2.00 0.35 1642 5.35 1.87 0.35 1711 29 18 4.90 4.26 0.87 1352 4.50 3.92 0.87 1435 4.15 3.61 0.87 1490 29 20 5.15 3.86 0.75 1408 4.80 3.60 0.75 1477 4.45 3.34 0.75 1559 29 22 5.45 3.43 0.63 1463 5.10 3.21 0.63 1546 4.75 2.99 0.63 1601 29 24 5.75 2.93 0.51 1518 5.40 2.75 0.51 1587 5.10 2.60 0.51 1656 29 26 6.05 2.36 0.39 1573 5.70 2.22 0.39 1642 5.35 2.09 0.39 1711 30 18 4.90 4.46 0.91 1352 4.50 4.10 0.91 1435 4.15 3.78 0.91 1490 30 20 5.15 4.07 0.79 1408 4.80 3.79 0.79 1477 4.45 3.52 0.79 1559 30 22 5.45 3.65 0.67 1463 5.10 3.42 0.67 1546 4.75 3.18 0.67 1601 30 24 5.75 3.16 0.55 1518 5.40 2.97 0.55 1587 5.10 2.81 0.55 1656 30 26 6.05 2.60 0.43 1573 5.70 2.45 0.43 1642 5.35 2.30 0.43 1711 31 18 4.90 4.66 0.95 1352 4.50 4.28 0.95 1435 4.15 3.94 0.95 1490 31 20 5.15 4.27 0.83 1408 4.80 3.98 0.83 1477 4.45 3.69 0.83 1559 31 22 5.45 3.87 0.71 1463 5.10 3.62 0.71 1546 4.75 3.37 0.71 1601 31 24 5.75 3.39 0.59 1518 5.40 3.19 0.59 1587 5.10 3.01 0.59 1656 31 26 6.05 2.84 0.47 1573 5.70 2.68 0.47 1642 5.35 2.51 0.47 1711 32 18 4.90 4.85 0.99 1352 4.50 4.46 0.99 1435 4.15 4.11 0.99 1490 32 20 5.15 4.48 0.87 1408 4.80 4.18 0.87 1477 4.45 3.87 0.87 1559 32 22 5.45 4.09 0.75 1463 5.10 3.83 0.75 1546 4.75 3.56 0.75 1601 32 24 5.75 3.62 0.63 1518 5.40 3.40 0.63 1587 5.10 3.21 0.63 1656 32 26 6.05 3.09 0.51 1573 5.70 2.91 0.51 1642 5.35 2.73 0.51 1711

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

OBH624A

Page 23

PERFORMANCE DATA HEAT operation at Rated frequency

MUZ-FH25VE

CAPACITY: 3.2 kW INPUT: 580 W

INDOOR

DB (°C)

OUTDOOR WB (°C)

-10 -5 0 5 10 15 20

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 2.02 377 2.43 452 2.85 510 3.26 551 3.68 586 4.06 603 4.48 615 21 1.92 406 2.30 481 2.72 534 3.10 574 3.52 603 3.90 621 4.30 644 26 1.73 435 2.14 510 2.53 563 2.94 603 3.36 632 3.74 650 4.16 667

MUZ-FH35VE

CAPACITY: 4.0 kW INPUT: 800 W

INDOOR

DB (°C)

OUTDOOR WB (°C)

-10 -5 0 5 10 15 20

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 2.52 520 3.04 624 3.56 704 4.08 760 4.60 808 5.08 832 5.60 848 21 2.40 560 2.88 664 3.40 736 3.88 792 4.40 832 4.88 856 5.38 888 26 2.16 600 2.68 704 3.16 776 3.68 832 4.20 872 4.68 896 5.20 920

MUZ-FH50VE

CAPACITY: 6.0 kW INPUT: 1480 W

INDOOR

DB (°C)

OUTDOOR WB (°C)

-10 -5 0 5 10 15 20

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 3.78 962 4.56 1154 5.34 1302 6.12 1406 6.90 1495 7.62 1539 8.40 1569 21 3.60 1036 4.32 1228 5.10 1362 5.82 1465 6.60 1539 7.32 1584 8.07 1643 26 3.24 1110 4.02 1302 4.74 1436 5.52 1539 6.30 1613 7.02 1658 7.80 1702

NOTE: Q : Total capacity (kW) INPUT : Total power input (W) DB: Dry-bulb temperature WB: Wet-bulb temperature

OBH624A

Page 24

MUZ-FH25VE MUZ-FH35VE MUZ-FH50VE

9-2. R.V. COIL CONTROL

Heating

. . . . . . . . . . . . . . . . .

Cooling

. . . . . . . . . . . . . . . . .

OFF

Dry

. . . . . . . . . . . . . . . . . . . .

OFF

NOTE: The 4-way valve reverses for 5 seconds right before start-up of the compressor.

OFF

Outdoor fan motor

Compressor

5 seconds 15 seconds

ON OFF

Compressor

Outdoor fan motor

R.V.coil

ON OFF

<COOL>

5 seconds

<HEAT>

5 seconds

9-1. OUTDOOR FAN MOTOR CONTROL

The fan motor turns ON/OFF, interlocking with the compressor. [ON] The fan motor turns ON 5 seconds before the compressor starts up. [OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running.

9-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR

Sensor Purpose

Actuator

Compressor

LEV

Outdoor fan

motor

R.V.coil

Indoor fan

motor

Defrost

heater

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

Cooling: Low ambient temperature operation

○○○

Heating: Defrosting (Heater)

○

Outdoor heat exchanger temperature thermistor

Cooling: Low ambient temperature operation

○○○

Cooling: High pressure protection

○○○

ACTUATOR CONTROL

OBH624A

Page 25

SERVICE FUNCTIONS

10-1. CHANGE IN DEFROST SETTING Changing defrost finish temperature

<JS> To change the defrost finish temperature, cut/solder the JS wire of the outdoor inverter P.C. board. (Refer to 11-6-1.)

Jumper wire

Defrost ﬁ nish temperature (°C)

MUZ-FH25/35VE MUZ-FH50VE

Soldered (Initial setting) 5 10

None (Cut) 10 18

10-2. PRE-HEAT CONTROL SETTING

PRE-HEAT CONTROL MUZ-FH25/35

When moisture gets into the refrigerant cycle, it may interfere the start-up of the compressor at low discharge temperature. The pre-heat control prevents this interference. The pre-heat control turns ON when the discharge temperature is 20°C or below. When the pre-heat control turns ON, the compressor is energized. (About 50 W)

MUZ-FH50

Prolonged low load operation, in which the thermostat is OFF for a long time, at low outside temperature (0°C or less) may cause the following troubles. To prevent those troubles, activate the pre-heat control.

1) If moisture gets into the refrigerant cycle and freezes, it may interfer the start-up of the compressor.

2) If liquid refrigerant collects in the compressor, a failure in the compressor may occur. The pre-heat control turns ON when the compressor temperature is 20°C or below. When the pre-heat control turns ON,

the compressor is energized. (About 70 W)

Pre-heat control setting

<JK> ON: To activate the pre-heat control, cut JK wire of the inverter P.C. board. OFF: To deactivate the pre-heat control, solder JK wire of the inverter P.C. board. (Refer to 11-6.1)

NOTE: When the inverter P.C. board is replaced, check JK wire, and cut/solder it if necessary.

MUZ-FH25VE MUZ-FH35VE MUZ-FH50VE

OBH624A

Page 26

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 main unit first with the remote controller, and then after confirming 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 electronic control P.C. board.

3) When removing the electrical parts, be careful of the residual voltage of smoothing capacitor.

4) When removing the electronic control 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 housing of the connector. DO NOT pull the lead wires.

TROUBLESHOOTING

3. Troubleshooting procedure

1) Check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality.

To make sure, check how many times the OPERATION INDICATOR lamp is flashing on and off before starting serv-

ice work.

2) Before servicing, check that the connector and terminal are connected properly.

3) When the electronic control 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 and 11-3.

Lead wiring

Housing point

MUZ-FH25VE MUZ-FH35VE MUZ-FH50VE

OBH624A

Page 27

Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (11-3.) disappears, the memorized failure details can be recalled.

11-2. FAILURE MODE RECALL FUNCTION

1. Flow chart of failure mode recall function for the indoor/outdoor unit

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.

Does POWER lamp on the indoor unit blink at the interval of 0.5 seconds? Blinks: Either indoor or outdoor unit is abnormal. Beep is emit-

ted at the same timing as the blinking of POWER lamp.

Indoor unit is normal. But the outdoor unit might be abnormal because there are some abnormalities that can not be recalled with this way. Conﬁ rm if outdoor unit is abnormal according to the detailed outdoor unit failure mode recall function. (Refer to 11-2.2)

Yes

The cause of abnormality cannot be found because the abnormality does not recur.

Setting up the failure mode recall function

Turn ON the power supply. <Preparation of the remote controller>

While pressing OPERATION SELECT button and TEMP button on the remote

controller at the same time, press RESET button.

First, release RESET button.

Hold down the other two buttons for another 3 seconds. Make sure that the indicators

on the LCD screen shown in the right ﬁ gure are all displayed. Then release the but- tons.

Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. 1

Judgment of indoor/outdoor abnormality

Before blinking, does POWER lamp stay ON for 3 seconds? Stays ON for 3 seconds (without beep): The outdoor unit is abnormal.

The indoor unit is abnormal. Check the blinking pattern, and identify the abnormal point with the indoor unit failure mode table. (Refer to indoor unit service manual.) Make sure to check at least two consecutive blinking cycles. 2

Releasing the failure mode recall function

Release the failure mode recall function by the following procedures. Turn OFF the power supply and turn it ON again. Press RESET button of the remote controller.

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

Repair the failure parts.

Deleting the memorized abnormal condition

After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall

function" mentioned above.

Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed)

with the remote controller headed towards the indoor unit. Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted. Release the failure mode recall function according to "Releasing the failure mode recall function"

mentioned above.

Operational procedure

Yes (Blinks)

No (OFF)

1. Regardless of normal or abnormal condition, a short beep is emitted once the signal is received.

2. Blinking pattern when the indoor unit is abnormal:

3.Blinking pattern when the outdoor unit is abnormal:

OFF

Beeps

Repeated cycle Repeated cycle

OFF

No beep Beeps

Repeated cycle

2.5-second OFF

Blinking at 0.5-

second interval

2.5-second OFF 3-second ON

Blinking at 0.5second interval

Beeps

Repeated cycle

2.5-second OFF

Blinking at 0.5-

second interval

No beep Beeps

Repeated cycle

2.5-second OFF

3-second ON

Blinking at 0.5second interval

Repeated cycle

Beeps

OBH624A

Page 28

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

2.Blinking pattern when outdoor unit is abnormal:

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 POWER lamp on the indoor unit blink at the interval of 0.5 seconds? Blinks: The outdoor unit is abnormal. Beep is emitted

at the same timing as the blinking of POWER lamp. 2

Yes (Blinks

)

No (OFF)

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

Operational procedure

Conﬁ rm that the remote controller is in the failure mode recall function.

With the remote controller headed towards the indoor unit, press TEMP

button 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 identify the abnormal point with the outdoor unit failure mode table (11-2.3.). Make sure to check at least two consecutive blinking cycles.

Releasing the failure mode recall function

Release the failure mode recall function by the following procedures. Turn OFF the power supply and turn it ON again. Press RESET button of the remote controller.

Repair the failure parts.

The outdoor unit is normal.

Release the failure mode recall function according to the left mentioned procedure.

Deleting the memorized abnormal condition

After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall

function" (11-2.1.).

Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed) with

the remote controller headed towards the indoor unit.

Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted.

Release the failure mode recall function according to "Releasing the failure mode recall function" men-

tioned above.

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.

The information regarding whether the

connected outdoor unit is a low-standby-

power model or a non-low-standby-power model will also be initialized.

(Default= compatible with a low-standby-

power model)

NOTE: It takes up to 1 minute to indicate the outdoor unit

abnormality.

Even if POWER lamp is not lighting, keep check-

ing at least 1 minute or longer.

OBH624A

Page 29

3. Outdoor unit failure mode table

POWER lamp

(Indoor unit)

Abnormal point

(Failure mode/protection)

LED indication

(Outdoor P.C. board)

Condition Remedy

Indoor/outdoor

unit failure

mode recall

function

Outdoor unit failure mode

recall function

OFF None (Normal)

—— ———

1-time ﬂ ash

2.5 seconds OFF

Indoor/outdoor communication, receiving error

—

Any signals from the inverter P.C. board cannot be received normally for 3 minutes.

•Refer to 11-5. How to check miswiring and serial signal error.

○○

Indoor/outdoor communication, receiving error

—

Although the inverter P.C. board sends signal "0", signal "1" has been received 30 consecutive times.

•Refer to 11-5.

How to check miswiring and serial signal error.

2-time ﬂ ash

2.5 seconds OFF

Outdoor power system

—

Overcurrent protection cut-out operates 3 consecutive times within 1 minute after the compressor gets started.

Reconnect connectors. Refer to 11-5. "How to check inverter/ compressor". Check stop valve.

•

○○

3-time ﬂ ash

2.5 seconds OFF

Discharge temperature thermistor

1-time ﬂ ash every

2.5 seconds

Thermistor shorts or opens during compressor running.

Refer to 11-5. "Check of outdoor thermistors". Defective outdoor thermistors can be identiﬁ ed by checking the blinking pattern of LED.

•

○○

Defrost thermistor Fin temperature thermistor 3-time ﬂ ash

2.5 seconds OFF

P.C. board temperature thermistor

4-time ﬂ ash

2.5 seconds OFF

Ambient temperature thermistor

2-time ﬂ ash

2.5 seconds OFF

Outdoor heat exchanger temperature thermistor

—

4-time ﬂ ash

2.5 seconds OFF

Overcurrent 11-time ﬂ ash

2.5 seconds OFF

Large current ﬂ ows into power module (IC700) (FH25/35)/ IGBT module (IC700) (FH50).

Reconnect compressor connector. Refer to 11-5. "How to check inverter/ compressor". Check stop valve.

•

—

○

Compressor synchronous abnormality (Compressor start-up failure protection)

12-time ﬂ ash

2.5 seconds OFF

Waveform of compressor current is distorted.

Reconnect compressor connector. Refer to 11-5. "How to check inverter/ compressor".

•

—

○

5-time ﬂ ash

2.5 seconds OFF

Discharge temperature

—

Temperature of discharge temperature thermistor exceeds 116°C, compressor stops. Compressor can restart if discharge temperature thermistor reads 100°C or less 3 minutes later.

Check refrigerant circuit and refrigerant amount. Refer to 11-5. "Check of LEV".

•

—

○

6-time ﬂ ash

2.5 seconds OFF

High pressure

—

Temperature indoor coil thermistor exceeds 70°C in HEAT mode. Temperature defrost thermistor exceeds 70°C in COOL mode.

Check refrigerant circuit and refrigerant amount. Check stop valve.

•

—

○

7-time ﬂ ash

2.5 seconds OFF

Fin temperature/ P.C. board temperature

7-time ﬂ ash

2.5 seconds OFF

Temperature of ﬁ n temperature thermistor on the inverter P.C. board exceeds 75 ~ 86°C (FH25/35)/75 ~ 80°C (FH50), or temperature of P.C. board temperature thermistor on the inverter P.C. board exceeds 72 ~ 85°C (FH25/35)/70 ~ 75°C (FH50).

Check around outdoor unit. Check outdoor unit air passage. Refer to 11-5. "Check of outdoor fan motor".

•

—

○

8-time ﬂ ash

2.5 seconds OFF

Outdoor fan motor

—

Outdoor fan has stopped 3 times in a row within 30 seconds after outdoor fan start-up.

Refer to 11-5. "Check of outdoor fan motor". Refer to 11-5.

"Check

of inverter P.C. board".

• —

○

9-time ﬂ ash

2.5 seconds OFF

Nonvolatile memory data 5-time ﬂ ash

2.5 seconds OFF

Nonvolatile memory data cannot be read properly.

Replace the inverter P.C. board.

•

○○

Power module (IC700) (FH25/35) IGBT module (IC700) (FH50)

6-time ﬂ ash

2.5 seconds OFF

The interface short circuit occurs in the output of the power module (IC700) (FH25/35)/IGBT module (IC700) (FH50). The compressor winding shorts circuit.

Refer to 11-5. "How to check inverter/ compressor".

•

10-time ﬂ ash

2.5 seconds OFF

Discharge temperature

—

Temperature of discharge temperature thermistor has been 50°C or less for 20 minutes.

Refer to 11-5. "Check of LEV". Check refrigerant circuit and refrigerant amount.

•

•—

○

11-time ﬂ ash

2.5 seconds OFF

Bus-bar voltage (DC) 8-time ﬂ ash

2.5 seconds OFF

Bus-bar voltage of inverter cannot be detected normally.

Refer to 11-5. "How to check inverter/ compressor".

• —

○

Each phase current of compressor

9-time ﬂ ash

2.5 seconds OFF

Each phase current of compressor cannot be detected normally.

14-time ﬂ ash

2.5 seconds OFF

Stop valve (Closed valve) 14-time ﬂ ash

2.5 seconds OFF

Closed valve is detected by compressor current.

Check stop valve.•

○○

NOTE: Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE (11-3.).

OBH624A

Page 30

11-3. TROUBLESHOOTING CHECK TABLE

No. Symptom LED indication

Abnormal point/

Condition

Condition Remedy

Outdoor unit does not operate.

1-time ﬂ ash every

2.5 seconds

Outdoor power system

Overcurrent protection cut-out operates 3 consecutive times within 1 minute after the compressor gets started.

Reconnect connector of compressor. Refer to 11-5.

"How to check inverter/compressor". Check stop valve.

•

Outdoor thermistors Discharge temperature thermistor, ﬁ n temperature thermistor,

defrost thermistor, P.C. board temperature thermistor, outdoor heat exchanger temperature thermistor or ambient temperature thermistor shorts or opens during compressor running.

Refer to 11-5. "Check of outdoor thermistors".

•

Outdoor control system

Nonvolatile memory data cannot be read properly. (POWER lamp of the indoor unit lights up or ﬂ ashes 7-time.)

Replace inverter P.C. board. •

6-time ﬂ ash

2.5 seconds OFF

Serial signal The communication fails between the indoor and outdoor unit

for 3 minutes.

Check connection between the inverter P.C. board and the relay P.C. board. (FH50) Refer to 11-5. "How to check miswiring and serial signal error.

•

11-time ﬂ ash

2.5 seconds OFF

Stop valve/ Closed valve

Closed valve is detected by compressor current. Check stop valve. •

14-time ﬂ ash

2.5 seconds OFF

Outdoor unit (Other abnormality)

Outdoor unit is defective. Refer to 11-2.2. "Flow chart of the

detailed outdoor unit failure mode recall function".

•

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

2-time ﬂ ash

2.5 seconds OFF

Overcurrent protection

Large current ﬂ ows into power module (IC700) (FH25/35)/ IGBT module (IC700) (FH50).

Reconnect connector of compressor. Refer to 11-5. "How to check inverter/compressor". Check stop valve.

•

3-time ﬂ ash

2.5 seconds OFF

Discharge temperature overheat protection

Temperature of discharge temperature thermistor exceeds 116°C, compressor stops. Compressor can restart if discharge temperature thermistor reads 100°C or less 3 minutes later.

Check refrigerant circuit and refrigerant amount. Refer to 11-5. "Check of LEV".

•

4-time ﬂ ash

2.5 seconds OFF

Fin temperature /P.C. board temperature thermistor overheat protection

Temperature of ﬁ n temperature thermistor on the heat sink ex- ceeds 75 ~ 86°C (FH25/35)/75 ~ 80°C (FH50) or temperature of P.C. board temperature thermistor on the inverter P.C.board exceeds 72 ~ 85°C (FH25/35)/70 ~ 75°C (FH50).

Check around outdoor unit. Check outdoor unit air passage. Refer to 11-5. "Check of outdoor fan motor".

•

5-time ﬂ ash

2.5 seconds OFF

High pressure protection

Indoor coil thermistor exceeds 70°C in HEAT mode. Defrost thermistor exceeds 70°C in COOL mode.

Check refrigerant circuit and refrigerant amount. Check stop valve.

•

8-time ﬂ ash

2.5 seconds OFF

Compressor synchronous abnormality

The waveform of compressor current is distorted.

Reconnect connector of compressor. Refer to 11-5. "How to check inverter/compressor".

•

10-time ﬂ ash

2.5 seconds OFF

Outdoor fan motor Outdoor fan has stopped 3 times in a row within 30 seconds

after outdoor fan start-up.

Refer to 11-5.

"Check of outdoor fan motor. Refer to 11-5. "Check of inverter P.C. board.

•

12-time ﬂ ash

2.5 seconds OFF

Each phase current of compressor

Each phase current of compressor cannot be detected normally.

Refer to 11-5.

"How to check inverter/compressor".

•

13-time ﬂ ash

2.5 seconds OFF

Bus-bar voltage (DC)

Bus-bar voltage of inverter cannot be detected normally. It occurs with following case.

Instantaneous power voltage drop. (Short time power failure) (FH50) Refer to 11-5.

"Check of power supply". (FH50) Refer to 11-5. "How to check inverter/compressor".

•

Outdoor unit operates.

1-time ﬂ ash

2.5 seconds OFF

Frequency drop by current protection

FH25/35 When the input current exceeds approximately

10A (FH25)/10.5A (FH35), compressor frequency lowers.

The unit is normal, but check the following. Check if indoor ﬁ lters are clogged. Check if refrigerant is short. Check if indoor/outdoor unit air circulation is short cycled.

•

FH50 Current from power outlet is nearing breaker ca-

pacity.

3-time ﬂ ash

2.5 seconds OFF

Frequency drop by high pressure protection

Temperature of indoor coil thermistor exceeds 55°C in HEAT mode, compressor frequency lowers.

Frequency drop by defrosting in COOL mode

Indoor coil thermistor reads 8°C or less in COOL mode, compressor frequency lowers.

4-time ﬂ ash

2.5 seconds OFF

Frequency drop by discharge temperature protection

Temperature of discharge temperature thermistor exceeds 111°C, compressor frequency lowers.

Check refrigerant circuit and refrigerant amount. Refer to 11-5.

"Check of LEV". Refer to 11-5. "Check of outdoor thermistors".

•

MUZ-FH25/35

5-time ﬂ ash

2.5 seconds OFF

Outside temperature thermistor protection

When the outside temperature thermistor shorts or opens, protective operation without that thermistor is performed.

Refer to 11-5. Check of outdoor thermistors.

•

OBH624A

Page 31

No. Symptom LED indication

Abnormal point/

Condition

Condition Remedy

Outdoor unit operates.

7-time ﬂ ash

2.5 seconds OFF

Low discharge temperature protection

Temperature of discharge temperature thermistor has been 50°C or less for 20 minutes.

Refer to 11-5. "Check of LEV". Check refrigerant circuit and refrigerant amount.

•

8-time ﬂ ash

2.5 seconds OFF

MUZ-FH25/35

PAM protection PAM: Pulse Amplitude Modulation

The overcurrent ﬂ ows into PFC (Power factor correction : IC820) or the bus-bar voltage reaches 394 V or more, PAM stops and restarts.

This is not malfunction. PAM protection will be activated in the following cases: 1 Instantaneous power voltage

drop. (Short time power failure)

2 When the power supply voltage

is high.

MUZ-FH50

Zero cross detecting circuit

Zero cross signal cannot be detected. It occurs with following cases.

1 Instantaneous power voltage

drop. (Short time power failure) 2 Distortion of primary voltage Refer to 11-5.

"Check of power

supply".

•

9-time ﬂ ash

2.5 seconds OFF

Inverter check mode The connector of compressor is disconnected, inverter check

mode starts.

Check if the connector of the compressor is correctly connected. Refer to 11-5. "How to check inverter/compressor".

•

NOTE: 1. The location of LED is illustrated at the right ﬁ gure. Refer to 11-6.1.

2. LED is lighted during normal operation. The ﬂ ashing frequency shows the number of times the LED blinks after every 2.5-second OFF.

(Example) When the ﬂ ashing frequency is “2”.

ON OFF

2.5-second OFF

0.5-second ON

0.5-second ON LED

Flashing →

MUZ-FH25/35VE

Inverter P.C. board

MUZ-FH50VE

LED

→

Flashing

OBH624A

Page 32

11-4. TROUBLE CRITERION OF MAIN PARTS

MUZ-FH25VE MUZ-FH35VE MUZ-FH50VE

Part name Check method and criterion Figure

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 11-6. “Test point diagram and voltage”, 1. “Inverter P.C.

board”, for the chart of thermistor.

Discharge temperature thermistor (RT62)

Measure the resistance with a tester. Before measurement, hold the thermistor with your hands to warm it up.

Refer to 11-6. “Test point diagram and voltage”, 1. “Inverter P.C. board”, for the chart of thermistor.

Compressor

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

Normal (Ω)

MUZ-FH25/35VE MUZ-FH50VE

U-V

U-W

V-W

1.66 ~ 2.26 0.87 ~ 1.18

Outdoor fan motor

Measure the resistance between lead wires using a tester. (Temperature: -10 ~ 40°C)

Color of lead wire

Normal (Ω)

MUZ-FH25/35VE MUZ-FH50VE

RED – BLK

BLK – WHT

WHT – RED

12 ~ 16 12 ~ 17

R. V. coil (21S4)

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

Normal (kΩ)

MUZ-FH25/35VE MUZ-FH50VE

1.41 ~ 2.00 1.19 ~ 1.78

Expansion valve coil (LEV)

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

Color of lead wire Normal (Ω)

RED – ORN

37 ~ 54

RED – WHT

RED – BLU RED – YLW

RED

(+12V)

YLW

BLU

WHT ORN

LEV

WHT

RED BLK

WHT

RED BLK

OBH624A

Page 33

11-5. TROUBLESHOOTING FLOW

A How to check inverter/compressor

Refer to 11-5. “Check of compressor operation time”. Does the compressor operate continuously?

Refer to 11-5. “Check of compressor start failure”.

OK.

Yes

Refer to 11-5. “Check of compressor winding”. Is the compressor normal?

Replace the compressor.

Yes

B Check of open phase

C Check of compressor

● With the connector between the compressor and the power module (IC700) (MUZ-FH25/35)/IGBT module (IC700) (MUZ-FH50) disconnected, activate the inverter and check if the inverter is normal by measuring the voltage balance between the terminals.

Output voltage is 50 - 130 V. (The voltage may differ according to the tester.) << Operation method>>

Start cooling or heating operation by pressing EMERGENCY OPERATION switch on the indoor unit. (TEST RUN OPERA-

TION: Refer to 8-3.) <<Measurement point>> At 3 points BLK (U)-WHT (V) BLK (U)-RED (W) WHT(V)-RED (W)

NOTE: 1. Output voltage varies according to power supply voltage.

2. Measure the voltage by analog type tester.

3. During this check, LED of the inverter P.C. board ﬂ ashes 9 times. (Refer to 11-6.1.)

Measure AC voltage between the lead wires at 3 points.

Are the voltages balanced?

Disconnect the connector between the compressor and the power module (IC700) (MUZ-FH25/35)/IGBT module (IC700) (MUZ-FH50).

Replace the inverter P.C. board.

Check the voltage between terminals.

Check the compressor.

See 11-5. “Check of compressor”.

Yes

See 11-5. “Check of open phase”.

OBH624A

Page 34

F Check of compressor start failure

D Check of compressor winding

E Check of compressor operation time

● Disconnect the connector between the compressor and the power module (IC700) (MUZ-FH25/35)/IGBT module (IC700) (MUZ-FH50), and measure the resistance between the compressor terminals.

<<Measurement point>> at 3 points BLK-WHT BLK-RED WHT-RED <<Judgement>> Refer to 11-4. 0 [Ω] ················Abnormal [short] Infinite [Ω] ·······Abnormal [open] NOTE: Be sure to zero the ohmmeter before measurement.

Measure the resistance between the lead wires at 3 points.

1 Heat the compressor with a drier for about 20 minutes. Do not recover refrigerant gas while heating.

Heating part

● Connect the compressor and activate the inverter. Then measure the time until the inverter stops due to over current. <<Operation method>> Start heating or cooling operation by pressing EMERGENCY OPERATION switch on the indoor unit. (TEST RUN OPERATION: Refer to 8-3.) <<Measurement>> Measure the time from the start of compressor to the stop of compressor due to overcurrent.

Compressor starts

Abnormal (IPM failure) (Compressor winding short)

Abnormal (Compressor lock out) (Starting defect)

Abnormal (Poor contact,) (Outdoor P.C. board defect) (Disconnected connector)

Abnormal (Refrigerant circuit defect) (Closed valve)

Normal

0 second 1 second

2 seconds

10 seconds

10 minutes

<<Judgement>>

After the compressor is heated with a drier, does the compressor start? 1

Replace the compressor.

Compressor start failure. Activate pre-heat control. (Refer to 10-2. "PRE-HEAT CONTROL SETTING")

Yes

Does the compressor run for 10 seconds or more after it starts?

Check the refrigerant circuit. Check the stop valve.

Yes

Conﬁ rm that ~ is normal.

•Electrical circuit check . Contact of the compressor connector . Output voltage of inverter P.C. board and balance of them (See 11-5. ) . Direct current voltage between DB61(+) and (-) (MUZ-FH25/35)/JP715(+)

and JP30(-) (MUZ-FH50) on the inverter P.C. board

. Voltage between outdoor terminal block S1-S2

OBH624A

Page 35

G Check of outdoor thermistors

Replace the thermistor except RT64. When RT64 is abnormal, replace the inverter P.C. board.

Replace the inverter P.C. board.

Is the resistance of thermistor normal? (Refer to 11-6.1.)

Reconnect the connector of thermistor. Turn ON the power supply and press EMERGENCY OPERATION switch.

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

OK. (Cause is poor contact.)

Yes

Disconnect the connector of thermistor in the outdoor P.C. board (see below table), and measure the resistance of thermistor.

MUZ-FH25/35

Thermistor Symbol Connector, Pin No. Board

Defrost RT61 Between CN641 pin1 and pin2

Inverter P.C. board

Discharge temperature RT62 Between CN641 pin3 and pin4 Fin temperature RT64 Between CN642 pin1 and pin2 Ambient temperature RT65 Between CN643 pin1 and pin2 Outdoor heat exchanger temperature RT68 Between CN644 pin1 and pin3

MUZ-FH50

Thermistor Symbol Connector, Pin No. Board

Defrost RT61 Between CN671 pin1 and pin2

Inverter P.C. board

Discharge temperature RT62 Between CN671 pin3 and pin4 Fin temperature RT64 Between CN673 pin1 and pin2 Ambient temperature RT65 Between CN672 pin1 and pin2 Outdoor heat exchanger temperature RT68 Between CN671 pin5 and pin6

OBH624A

Page 36

H Check of R.V. coil

First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 11-4. In case CN721 is disconnected or R.V. coil is open, voltage is generated between the terminal pins of the connector

although no signal is being transmitted to R.V. coil.

Check if CN721 is connected.

Is there 230 VAC between CN721 and

on the inverter P.C. board 3 minutes

after the power supply is turned ON?

Yes

Replace the inverter P.C. board.

Replace the 4-way valve.

Unit operates COOL mode even if it is set to HEAT mode.

Is there 230 VAC between CN721 and

on the inverter P.C. board 3 minutes

after the power supply is turned ON?

Yes

Replace the inverter P.C. board.

Replace the 4-way valve.

Unit operates HEAT mode even if it is set to COOL mode.

Disconnect connector between the compressor and the power module (IC700). Turn ON the power supply and press EMERGENCY OPERATION switch twice (HEAT mode).

Disconnect connector between the compressor and the power module (IC700). Turn ON the power supply and press EMERGENCY OPERATION switch once (COOL mode).

First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 11-4. In case CN602 is disconnected or R.V. coil is open, voltage is generated between the terminal pins of the connector

although no signal is being transmitted to R.V. coil.

Check if CN602 is connected.

Is there 230 VAC between CN602 and

on the inverter P.C. board 3 minutes

after the power supply is turned ON?

Yes

Replace the inverter P.C. board.

Replace the 4-way valve.

Unit operates COOL mode even if it is set to HEAT mode.

Is there 230 VAC between CN602 and

on the inverter P.C. board 3 minutes

after the power supply is turned ON?

Yes

Replace the inverter P.C. board.

Replace the 4-way valve.

Unit operates HEAT mode even if it is set to COOL mode.

Disconnect connector between the compressor and the IGBT module (IC700). Turn ON the power supply and press EMERGENCY OPERATION switch twice (HEAT mode).

Disconnect connector between the compressor and the IGBT module (IC700). Turn ON the power supply and press EMERGENCY OPERATION switch once (COOL mode).

MUZ-FH25/35

MUZ-FH50

OBH624A

Page 37

I Check of outdoor fan motor

Is the resistance between each terminal of outdoor fan motor normal? (Refer to 11-4.)

Disconnect CN932 from the inverter P.C. board, and turn on the power supply.

Rotate the outdoor fan motor manually and measure the voltage of CN931. Between 1(+) and 5(-) Between 2(+) and 5(-) Between 3(+) and 5(-)

Does the voltage between each terminal become 5 and 0 VDC repeatedly?

Does the outdoor fan motor rotate smoothly?

Replace the outdoor fan motor.

Replace the inverter P.C. board.

Yes

(Fixed to either 5 or 0 VDC)

Yes

Disconnect the connectors CN931 and CN932 from the inverter P.C. board. Check the connection between the connector CN931 and CN932.

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Page 38

J Check of power supply

Is there voltage 230 VAC between the indoor terminal block S1 and S2?

Yes

Replace the indoor electronic control P.C. board.

Rectify indoor/outdoor connecting wire.

Yes

If light up, OK. If ﬂ ash, refer to 11-3.

Does POWER lamp on the indoor unit light up?

Does LED on the inverter P.C. board light up or ﬂ ash? (Refer to 11-6.1.)

Replace the inverter P.C. board.

Is there bus-bar voltage 260 - 370 VDC between DB61 (+) and DB61 (–) (MUZ-FH25/35)/325 - 370 VDC between JP715 (+) and JP30 (–) (MUZ-FH50) on the inverter P.C. board? (Refer to 11-6.1.)

Check the electric parts in main circuit.

Yes

Disconnect the connector between the compressor and the power module (IC700) (MUZ-FH25/35)/IGBT module (IC700) (MUZ-FH50). Turn ON power supply and press EMERGENCY OPERATION switch.

Inverter P.C. board (Solder side)

DB61

260 - 370 VDC

MUZ-FH25/35

325 -370 VDC

JP30

JP715

MUZ-FH50

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Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. 1

Expansion valve operates in full-opening direction.

NOTE: After check of LEV, do the undermentioned operations.

1. Turn OFF the power supply and turn it ON again.

2. Press RESET button on the remote controller.

1. Regardless of normal or abnormal condition, a short beep is emitted once the signal is received.

Measure each voltage between connector pins of CN724 on the inverter P.C. board.

1. Pin (-) — Pin (+)

2. Pin (-) — Pin (+)

3. Pin (-) — Pin (+)

4. Pin (-) — Pin (+) Is there about 3 - 5 VAC between each?

NOTE: Measure the voltage by an analog

tester.

Properly ﬁ x the LEV coil to the expansion valve.

Replace the inverter P.C. board.

Replace the LEV coil.

Replace the expansion valve.

Is LEV coil properly ﬁ xed to the expansion valve?

Does the resistance of LEV coil have the characteristics? (Refer to 11-4.)

Do you hear the expansion valve "click, click·······"? Do you feel the expansion valve vibrate on touching it ?

Turn ON the power supply. <Preparation of the remote controller>

While pressing both OPERATION SELECT button and TEMP button on the remote controller at the same time, press RESET button. First, release RESET button.

Hold down the other two buttons for another 3 sec-

onds. Make sure that the indicators on the LCD screen shown in the right ﬁ gure are all displayed. Then re- lease the buttons.

Yes

K Check of LEV (Expansion valve)

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Check the outdoor fan motor. (Refer to 11-5. .)

Is the fuse (F901) blown on the inverter P.C. board?

Check the connection of the connectors (CN931, CN932) of the outdoor fan motor. If the connection is poor, make it correct.

Operate the outdoor unit by starting EMERGENCY OPERATION.

Check the LED indication on the inverter P.C. board. Does the LED ﬂ ash 10 times?

Replace the inverter P.C. board.

Check the corresponding parts following LED indication. (Refer to 11-3.)

Yes

Yes (10-time ﬂ ash)

L Check of inverter P.C. board

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M How to check miswiring and serial signal error

Turn OFF inverter-controlled lighting equipment. Turn OFF the power supply and then turn ON again. Press EMERGENCY OPERATION switch.

•

Is serial signal error indicated 6 minutes later?

Yes

Reinstall either the unit or the light away from each other. Attach a ﬁ lter on remote control receiving section of the indoor unit.

•

Turn the power supply OFF.

Is there rated voltage in the power supply?

Yes

Check for incorrect indoor-outdoor connecting wiring.

Check the power supply.

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

Yes

Check for miswiring, broken wires, and loose wire connection between the power supply and outdoor terminal block S1 and between the power supply and outdoor terminal block S2.

Wait for 2 or more minutes after the power supply is turned on. Touch S2 and S3 with tester probes and start the emergency operation.

When the emergency operation starts, does the rated voltage occur for 2 seconds between indoor terminal block S2 and S3?

Yes

Turn the power supply OFF.

Turn the power supply ON.

Wait for 2 or more minutes after the power supply is turned ON. Touch CN202 and JPG with tester probes and start the emergency operation.

During the emergency operation, does DC (2V or more) occur for 2 seconds between CN202

and JPG on the indoor electronic control P.C. board?

Does the indoor POWER lamp blink continuously 6 minutes after the emergency operation starts?

Does the outdoor LED light up?

Replace the indoor electronic control P.C. board.

Replace the indoor power P.C. board.

Yes

Does the outdoor LED blink 6 times?

Yes

Conﬁ rm that the thermostat is OFF and wiring is not loose.

Does DC (6V or more) occur between indoor terminal block S2 and S3?

Yes

Replace the outdoor inverter P.C. board. 1

Turn the power supply OFF. Replace the indoor power P.C. board.

Start the emergency operation.

Yes

Repair completed.

Does DC (20V or more) occur between indoor terminal block S2 and S3 ?

Yes

Replace the outdoor inverter P.C. board. 1

Replace the indoor electronic control P.C. board.

1. Electric charge may remain immediately after the power supply is turned OFF. Perform the procedure after 3 minutes.

Replace the outdoor inverter P.C. board. 1

Turn the power supply ON.

Does the indoor POWER lamp blink continuously 6 minutes after the emergency operation starts?

Yes

Turn the power supply ON.

Was the indoor unit ever connected to the Multi (MXZ) series and operated (turned on)?

The connection information to the Multi series is stored in the indoor unit. Refer to “Deleting the memorized abnormal condition” described in 11-2.1 to clear the error history. When the error history is being cleared, the connection information also will be initialized. The indoor unit will be compatible with a low-standby-power model after initialization.

Yes

MUZ-FH25/35

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Page 42

MUZ-FH50

Turn the power supply OFF.

Is there rated voltage in the power supply?

Yes

Check for incorrect indoor-outdoor connecting wiring.

Check the power supply.

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

Check for miswiring, broken wires, and loose wire connection between the power supply and outdoor terminal block S1 and between the power supply and

outdoor terminal block S2. Wait for 2 or more minutes after the power supply is turned on. Touch S2 and S3 with tester probes and start the emergency operation.

When the emergency operation starts, does the rated voltage occur for 2 seconds between indoor terminal block S2 and S3?

Was the indoor unit ever connected to the Multi (MXZ) series and operated (turned on)?

Yes

B Turn the power supply ON.

Yes

Turn OFF inverter-controlled lighting equipment. Turn OFF the power supply and then turn ON again. Press EMERGENCY OPERATION switch.

•

Is serial signal error indicated 6 minutes later?

Yes

Reinstall either the unit or the light away from each other. Attach a ﬁ lter on remote control receiving section of the indoor unit.

•

NOTE: Refer to the indoor unit service manual.

Replace the indoor electronic control P.C. board.

Does the indoor POWER lamp blink continuously 6 minutes after the emergency operation starts?

Does DC (10 V or more) occur between L68A and L68B on the relay P.C. board?

Yes

Does the outdoor LED blink 6 times?

Yes

Replace the relay P.C. board.

Does DC (more than 0 V) occur between indoor terminal block S2 and S3?

Yes

Replace the inverter P.C. board. 1

Turn the power supply OFF.

Start the emergency operation.

Repair has been completed.

Replace the inverter P.C. board and the relay P.C. board.

1. Electric charge may remain immediately after the power supply is turned OFF. Perform the procedure after 3 minutes.

Replace the inverter P.C. board and the relay P.C. board. 1

Turn the power supply ON.

Does the indoor POWER lamp blink continuously 6 minutes after the emergency operation starts?

Yes

Replace the indoor electronic control P.C. board.

Yes

Replace the inverter P.C. board and the relay P.C. board. 1

Yes

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N Electromagnetic noise enters into TV sets or radios

Yes

Is the unit earthed?

Earth the unit.

Yes

Is the distance between the antennas and the indoor unit within 3 m, or is the distance between the antennas and the outdoor unit within 3 m?

Extend the distance between the antennas and the indoor unit, and/or the antennas and the outdoor unit.

Is the distance between the TV sets or radios and the indoor unit within 1 m, or is the distance between the TV sets or radios and the outdoor unit within 3 m?

Yes

Extend the distance between the TV sets and/or radios and the indoor unit, or the TV sets or radios and the outdoor unit.

Are the antennas damaged? Is the coaxial cable damaged? Is there any poor contact in the antenna wiring?

Yes

Replace or repair the antenna. Replace or repair the coaxial cable.

Is the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas close?

Yes

Extend the distance between the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas.

Even if all of the above conditions are fulﬁ lled, the electromagnetic noise may enter, depending on the electric ﬁ eld strength or the installation condition (combination of speciﬁ c conditions such as antennas or wiring). Check the following before asking for service.

1. Devices affected by the electromagnetic noise TV sets, radios (FM/AM broadcast, shortwave)

2. Channel, frequency, broadcast station affected by the electromagnetic noise

3. Channel, frequency, broadcast station unaffected by the electromagnetic noise

4. Layout of: indoor/outdoor unit of the air conditioner, indoor/outdoor wiring, earth wire, antennas, wiring from antennas, receiver

5. Electric ﬁ eld intensity of the broadcast station affected by the electromagnetic noise

6. Presence or absence of ampliﬁ er such as booster

7. Operation condition of air conditioner when the electromagnetic noise enters in

1) Turn OFF the power supply once, and then turn ON the power supply. In this situation, check for the electromagnetic noise.

2) Within 3 minutes after turning ON the power supply, press OPERATE/STOP (ON/OFF) button on the remote controller for power ON, and check for the electromagnetic noise.

3) After a short time (3 minutes later after turning ON), the outdoor unit starts running. During operation, check for the electromagnetic noise.

4) Press OPERATE/STOP (ON/OFF) button on the remote controller for power OFF, when the outdoor unit stops but the indoor/outdoor communication still runs on. In this situation, check for the electromagnetic noise.

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-20 -10 0 10 20 30 40

100

Temperature( )

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

Temperature( )

Discharge temperature thermistor(RT62)

0 102030405060708090100110120

100

200

300

400

500

600

700

0 1020304050607080

100

120

140

160

180

200

Temperature( )

Fin temperature thermistor(RT64)

Resistance(k )

1. Inverter P.C. board

MUZ-FH25VE MUZ-FH35VE

11-6. TEST POINT DIAGRAM AND VOLTAGE

Fin temperature

thermistor/RT64

(CN642)

Ambient temperature

thermistor/RT65

(CN643)

Discharge temperature

thermistor/RT62

(CN641)

Defrost thermistor

/RT61(CN641)

DB61 260 - 370 VDC

Front side of unit

230 VAC

Smoothing capacitor (C62)

Output to drive compressor (LDU, LDV, LDW)

(+)

(-)

Fuse (F701) T3.15AL250V

Smoothing capacitor (C61)

Fuse (F901) T3.15AL250V

R.V.coil (CN721) 230 VAC

Jumper wire for changing defrost setting (JS)

Signal of outdoor

fan motor (CN931)

230 VAC

Outdoor heat exchanger

temperature thermistor

/RT68 (CN644)

Jumper wire for pre-heat control setting (JK)

Fuse (F801) T3.15AL250V

Back side of unit

LEV connector

(CN724)

Output to drive outdoor fan motor (CN932)

LED

OBH624A

Page 45

MUZ-FH50VE

-20 -10 0 10 20 30 40

100

Temperature( )

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

Temperature( )

Discharge temperature thermistor(RT62)

0 102030405060708090100110120

100

200

300

400

500

600

700

0 1020304050607080

100

120

140

160

180

200

Temperature( )

Fin temperature thermistor(RT64)

Resistance(k )

Fin temperature thermistor/RT64 (CN673)

Ambient temperature thermistor/RT65 (CN672)

Discharge temperature thermistor/RT62 (CN671)

Defrost thermistor /RT61 (CN671)

Output to drive outdoor fan motor (CN932)

Outdoor heat exchanger temperature thermistor /RT68 (CN671)

Fuse (F901) T3.15AL250V

Fuse (F880) T3.15AL250V

LEV connector (CN724)

Jumper wire for changing defrost setting (JS)

Jumper wire for pre-heat control setting (JK)

Fuse (F601) T3.15AL250V

Signal of outdoor fan motor (CN931)

R.V. coil (CN602) 230VAC

325 - 370 VDC

JP715 (+)

JP30 (-)

LED

Heater (CN601) 230VAC

To relay P.C. board CN680 (CN681)

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2. Relay P.C. board

MUZ-FH50VE

To inverter P.C. board CN681 (CN680)

CN60

L68B(-)

L68A(+)

10 VDC

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Page 47

12-1. MUZ-FH25VE MUZ-FH35VE

NOTE: Turn OFF power supply before disassembly.

OPERATING PROCEDURE PHOTOS

1. Removing the cabinet

(1) Remove the screw fixing the service panel. (2) Pull down the service panel and remove it. (3) Disconnect the power supply and indoor/outdoor con-

necting wire. (4) Remove the screws fixing the top panel. (5) Remove the top panel. (6) Remove the screws fixing the cabinet. (7) Remove the cabinet. (8) Remove the screws fixing the back panel. (9) Remove the back panel.

Photo 1

Photo 2

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

locking mechanism.

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

Hold the sleeve, and pull out the terminal slowly.

Connector

Sleeve

Locking lever

Back panel

Service

panel

Screws of the

top panel

Screws of the cabinet

Screws of the top panel

Screw of the service panel

Direction to remove

Screws of

the cabinet

Hooks

<"Terminal with locking mechanism" Detaching points>

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

DISASSEMBLY INSTRUCTIONS

Screw of the cabinet

Screw of the back panel

Screws of the terminal block support and the back panel

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OPERATING PROCEDURE

PHOTOS

2. Removing the inverter assembly, inverter P.C. board

(1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following con-

nectors:

CN721 (R.V. coil) CN931, CN932 (Fan motor) CN641 (Defrost thermistor and discharge temperature ther-

mistor) CN643 (Ambient temperature thermistor) CN644 (Outdoor heat exchanger temperature thermistor) CN724 (LEV)

(3) Remove the compressor connector (CN61). (4) Remove the screws fixing the heat sink support and the sep-

arator.

(5) Remove the fixing screws of the terminal block support and

the back panel. (6) Remove the inverter assembly. (7) Remove the screw of the earth wire and screw of the termi-

nal block support. (8) Remove the heat sink support from the P.C. board support. (9) Remove the screw of the inverter P.C. board and remove the

inverter P.C. board from the P.C. board support.

Photo 3

Photo 4 (Inverter assembly)

Photo 5

3. Removing R.V. coil

(1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the following connectors: <Inverter P.C. board>

CN721 (R.V. coil)

(3) Remove the R.V. coil.

4. Removing the discharge temperature thermistor, defrost thermistor, outdoor heat exchanger temperature thermistor and ambient temperature thermistor

(1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following con-

nectors: <Inverter P.C. board>

CN641 (Defrost thermistor and discharge temperature ther-

mistor) CN643 (Ambient temperature thermistor) CN644 (Outdoor heat exchanger temperature thermistor)

(3) Pull out the discharge temperature thermistor from its holder. (4) Pull out the defrost thermistor from its holder. (Photo 6) (5) Pull out the outdoor heat exchanger temperature thermistor

from its holder. (Photo 6)

(6) Pull out the ambient temperature thermistor from its holder.

Discharge temperature thermistor

Screw of the R.V. coil

Screws of the heat sink support and the separator

Heat sink

Screw of the earth wire

Screw of the Terminal block support

Screw of the inverter P.C. board

Screws of the terminal block support and the back panel

Heat sink support

P.C. board support

Terminal block support

Ambient temperature thermistor

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Page 49

OPERATING PROCEDURE

PHOTOS

5. Removing outdoor fan motor

(1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the following connectors: <Inverter P.C. board>

CN931, CN932 (Fan motor) (3) Remove the propeller nut. (4) Remove the propeller. (5) Remove the screws fixing the fan motor. (6) Remove the fan motor.

Photo 6

Photo 7

6. Removing the compressor and 4-way valve

(1) Remove the cabinet and panels. (Refer to 1.) (2) Remove the inverter assembly. (Refer to 2.) (3) Recover gas from the refrigerant circuit.

NOTE: Recover gas from the pipes until the pressure gauge

shows 0 kg/cm

(0 MPa).

(4) Detach the brazed part of the suction and the discharge pipe

connected with compressor. (5) Remove the nuts of compressor legs. (6) Remove the compressor. (7) Detach the brazed part of pipes connected with 4-way valve.

Propeller nut

Screws of the outdoor fan motor

Propeller

Photo 8

Defrost thermistor

Outdoor heat exchanger temperature thermistor

Brazed parts of 4-way valve

Suction pipe brazed part

Discharge pipe brazed part

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12-2. MUZ-FH50VE

NOTE: Turn OFF power supply before disassembly.

OPERATING PROCEDURE

PHOTOS

1. Removing the cabinet

(1) Remove the screws of the service panel. (2) Remove the screws of the top panel. (3) Remove the screw of the valve cover. (4) Remove the service panel. (5) Remove the top panel. (6) Remove the valve cover. (7) Disconnect the power supply and indoor/outdoor connect-

ing wire. (8) Remove the screws of the cabinet. (9) Remove the cabinet. (10)

Remove the screws of the back panel.

(11)

Remove the back panel.

Photo 2

Photo 1

Screws of the cabinet

Screws of the top panel

Screws of the cabinet

Screws of the top panel

Screw of the back panel

Screws of the cabinet

Screws of the service panel

Screw of the valve cover

Screws of the cabinet

Screws of the back panel

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Page 51

OPERATING PROCEDURE

PHOTOS

2. Removing the inverter assembly, inverter P.C. board and relay P.C. board

(1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following con-

nectors: <Inverter P.C. board> CN602 (R.V. coil) CN931, CN932 (Fan motor) CN671 (Defrost thermistor, discharge temperature thermistor

and outdoor heat exchanger temperature thermistor) CN672 (Ambient temperature thermistor) CN724 (LEV)

(3) Remove the compressor connector. (4) Remove the screws fixing the relay panel. (5) Remove the relay panel. (6) Remove the earth wires and the lead wires of the inverter P.C.

board.

(7) Remove the screws of the P.B. support. (8) Remove the inverter P.C. board from the relay panel. (9) Disconnect the following connectors:

<Relay P.C. board> CN60 (Terminal block) CN680 (Inverter P.C. board) TAB65 (Inverter P.C. board) TB71

(10)

Remove the screws fixing the P.B. holder.

(11)

Remove the relay P.C. board from the P.B. holder.

Photo 3

Photo 4

3. Removing R.V. coil

(1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the following connector: <Inverter P.C. board>

CN602 (R.V. coil)

(3) Remove the R.V. coil.

Screws of the P.B. support

Screws of the relay panel

Inverter P.C. board

Earth wires

Screw of the P.B. holder

Screws of the P.B. support

Brazed parts of 4-way valve

Screw of the R.V. coil

Screw of the relay panel

Relay P.C board

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Page 52

OPERATING PROCEDURE PHOTOS

4. Removing the discharge temperature thermistor, defrost thermistor, outdoor heat exchanger temperature thermistor and ambient temperature thermistor

(1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following

connectors: <Inverter P.C. board> CN671 (Defrost thermistor, discharge temperature thermis-

tor and outdoor heart exchanger temperature thermistor)

CN672 (Ambient temperature thermistor)

(3) Pull out the discharge temperature thermistor from its hold-

er. (Photo 7) (4) Pull out the defrost thermistor from its holder. (5) Pull out the outdoor heat exchanger temperature thermistor

from its holder. (6) Pull out the ambient temperature thermistor from its holder.

Photo 5

Photo 6

Photo 7

5. Removing outdoor fan motor

(1)

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

(2) Disconnect the following connectors:

CN931 and CN932 (Fan motor)

(3) Remove the propeller. (4) Remove the screws fixing the fan motor. (5) Remove the fan motor.

6. Removing the compressor and 4-way valve

(1)

Remove the top panel, cabinet and service panel. (Refer to 1.) (2) Remove the back panel. (Refer to 1.) (3) Remove the inverter assembly. (Refer to 2.) (4) Recover gas from the refrigerant circuit.

NOTE: Recover gas from the pipes until the pressure gauge

shows 0 kg/cm2 (0 MPa).

(5) Detach the brazed part of the suction and the discharge

pipe connected with compressor. (6) Remove the compressor nuts. (7) Remove the compressor. (8) Detach the brazed parts of 4-way valve and pipe. (Photo 4)

Screws of the outdoor fan motor

Brazed part of the discharge pipe

Brazed part of the suction pipe

Discharge temperature thermistor

Outdoor heat exchanger temperature thermistor

Ambient temperature thermistor

Defrost thermistor

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Page 53

OBH624A

Page 54

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

New publication, effective Mar. 2013 Specifications are subject to change without notice.

Mitsubishi Electric MUZ-FH25VE - E1, MUZ-FH35VE - E1, MUZ-FH50VE - E1, MUZ-FH25VE, MUZ-FH35VE Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual