Mitsubishi MUZ-SF35VE-E2, MUZ-SF25VE, MUZ-SF25VEH, MUZ-SF35VE, MUZ-SF35VEH Service Manual

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SERVICE MANUAL

CONTENTS

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

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

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

4. NOISE CRITERIA CURVES ······························ 6

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

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

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

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

9. ACTUA TOR CONTROL ··································· 27

10. SERVICE FUNCTIONS ···································· 28

11. TROUBLESHOOTING ····································· 28

12. DISASSEMBLY INSTRUCTIONS ···················· 45

Models

SPLIT-TYPE AIR CONDITIONERS

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

HFC

utilized

R410A

No. OBH629

REVISED EDITION-A

OUTDOOR UNIT

Indoor unit service manual MSZ-SF•VE Series (OBH600)

PARTS CATALOG (OBB629)

MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH MUZ-SF42VE MUZ-SF42VEH

MUZ-SF25VE

MUZ-SF42VE

MUZ-SF25VE

MUZ-SF42VE

MUZ-SF25VEH

MUZ-SF42VEH

MUZ-SF35VE

MUZ-SF50VE

MUZ-SF35VE

MUZ-SF50VEH

MUZ-SF35VEH

Revision A:

• MUZ-SF25/35/42VE - E2 have been added. Please void OBH629.

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-SF25/35/42VE - E2 have been added.

OBH629A

MUZ-SF25VE -

MUZ-SF25VEH -

MUZ-SF35VE -

MUZ-SF35VEH -

MUZ-SF42VE -

MUZ-SF42VEH -

MUZ-SF50VE -

MUZ-SF50VEH -

1. New model

MUZ-SF25VE -

MUZ-SF35VE -

MUZ-SF42VE -

1. Condenser net has been changed. (Material: Plastic Steel wire)

TECHNICAL CHANGES

OBH629A

Air outlet

Drain outlet

Piping

Drain hose

Air inlet

(back and side)

MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH MUZ-SF42VE MUZ-SF42VEH

PART NAMES AND FUNCTIONS

ACCESSORIES

MODELS

MUZ-SF25VE MUZ-SF35VE MUZ-SF42VE MUZ-SF50VE

Drain socket 1

MUZ-SF50VE MUZ-SF50VEH

Piping

Air outlet

Drain outlet

Air inlet

(back and side)

Drain hose

OBH629A

Outdoor model

MUZ-SF25VE

MUZ-SF25VEH

MUZ-SF35VE

MUZ-SF35VEH

MUZ-SF42VE

MUZ-SF42VEH

MUZ-SF50VE

MUZ-SF50VEH

Power supply Single phase, 230 V, 50 Hz

Capacity Rated frequency (Min.-Max.)

Cooling

2.5 (0.9 - 3.4) 3.5 (1.1 - 3.8) 4.2 (0.8 - 4.5) 5.0 (1.4 - 5.4)

Heating 3.2 (1.0 - 4.1) 4.0 (1.3 - 4.6) 5.4 (1.3 - 6.0) 5.8 (1.6 - 7.3)

Breaker Capacity A 10 16

Electrical data

Power input 1 (Total)

Cooling

600 1,080 1,340 1,660

Heating 780 1,030 1,580 1,700

Running current

(Total)

Cooling

3.2 4.9 6.0 7.4

Heating 3.9 4.7 7.0 7.6

Power factor

1 (Total)

Cooling

81 95 97 97

Heating 86 95 98 97

Starting current

1 (Total) A 3.9 4.9 7.0 7.6

Coefﬁ cient of performance (COP) 1 (Total)

Cooling 4.17 3.24 3.13 3.01 Heating 4.10 3.88 3.42 3.41

Compressor

Model KNB073FKVMC KNB092FNDMC SNB130FGAMT SNB130FGBMT Output W 550 650 900 900

Current

Cooling

3.04 4.74 5.84 7.22

Heating 3.70 4.48 6.78 7.33

Refrigeration oil (Model) L 0.32 (FV50S) 0.27 (FV50S) 0.35 (FV50S)

Fan motor

Model RC0J50-FA RC0J60-BD Current

Cooling

0.20 0.24 0.30 0.84

Heating 0.29 0.30 0.28 0.93 Dimensions W × H × D mm 800 × 550 × 285 840 × 880 × 330 Weight kg 31 31 35 55

Special remarks

Dehumidiﬁ cation Cooling L/h 0.3 1.0 1.7 2.2

Air ﬂ ow 1

Cooling

High

m3/h

1,698 1,956 1,806 2,868

Low 1,698 1,806 1,038 1,602

Heating

High 2,064 2,178 2,016 2,778 Med. 1,698 1,932 1,770 2,778

Low 1,350 1,476 1,326 2,124

Sound level 1

Cooling

dB(A)

47 49 50 52

Heating 48 50 51 52

Fan speed

Cooling

High

rpm

740 800 810 840

Low 740 740 490 480

Heating

High 890 890 900 810 Med. 740 790 770 810

Low 600 610 610 620 Fan speed regulator 3 Refrigerant ﬁ lling capacity (R410A) kg 0.7 0.8 1.15 1.55

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

OBH629A

Speciﬁ

cations and rated conditions of main electric parts

Model

Item

MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH MUZ-SF42VE MUZ-SF42VEH MUZ-SF50VE MUZ-SF50VEH

Smoothing capacitor

(C61, C62) 600 μF/ 620 μF 420 V

(C63) — 600 μF/ 620 μF 420 V

Diode module (DB61) 15 A 600 V 25 A 600 V Fuse

(F61) T20AL250V

(F701, F801, F901)

T3.15AL250V

Defrost heater (H) —

230 V

130 W

—

230 V

130 W

—

230V

130W

—

230V

130W

Power module

(IC700) 15 A 600 V 20 A 600 V (IC932) 8A600V

Expansion valve coil

(LEV) 12 V DC

Reactor (L61) 18 mH 23 mH Power factor

controller

(IC820) 20A 600V

Current-limiting PTC thermistor

(PTC64, PTC65)

33 Ω

Terminal block (TB) 5 P

Relay

(X63) 3 A 250 V (X64) 20 A 250 V (X66) — 3 A 250 V — 3 A 250 V — 3 A 250 V — 3 A 250 V

(X69) 10A 230V R.V.coil (21S4) 220 - 240 V AC Heater protector (26H) — Open 45°C — Open 45°C — Open 45°C — Open 45°C

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

47 48

NC-10

MUZ-SF25VE MUZ-SF25VEH

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-SF35VE MUZ-SF35VEH

NOISE CRITERIA CURVES

OBH629A

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

MUZ-SF42VE MUZ-SF42VEH

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

NC-10

MUZ-SF50VE MUZ-SF50VEH

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

OUTDOOR UNIT

MICROPHONE

1 m

OBH629A

Unit: mm

MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH MUZ-SF42VE MUZ-SF42VEH

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 (MUZ-SF25/35/42VE) Drain hole ø33 (MUZ-SF25/35/42VEH)

MUZ-SF50VE MUZ-SF50VEH

OUTLINES AND DIMENSIONS

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) Ø6.35

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

OBH629A

WIRING DIAGRAM

MUZ-SF25VE MUZ-SF35VE

MUZ-SF25VEH MUZ-SF35VEH

OBH629A

MUZ-SF42VE MUZ-SF50VE

MUZ-SF42VEH MUZ-SF50VEH

OBH629A

Unit: mm

MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH

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 ø3.0×ø2.0×240

Outdoor heat exchanger temperature thermistor RT68

Muffler

REFRIGERANT SYSTEM DIAGRAM

Unit: mm

MUZ-SF42VE MUZ-SF42VEH

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

Capillary tube ø3.0×ø1.8×600(×2)

LEV

Ambient temperature thermistor RT65

Muffler

Capillary tube ø3.0×ø2.0×240

Outdoor heat exchanger temperature thermistor RT68

Muffler

OBH629A

MUZ-SF50VE MUZ-SF50VEH

Unit: mm

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Discharge temperature thermistor RT62

Flared connection

Stop valve

Stop valve (with service port)

Capillary tube ø

4.0×ø

2.4×100

Capillary tube ø

4.0×ø

2.4×200

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

R.V. coil heating ON cooling OFF

Muffler

#100

Strainer

#100

Outdoor heat exchanger temperature thermistor RT68

Ambient temperature thermistor RT65

Strainer

#100

Muffler

Capillary tube ø3.0×ø2.0×200(×4)

Max. Length A

Max. Height

difference

Indoor unit

Outdoor unit

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFEFRENCE

Refrigerant piping: m Piping size O.D: mm

Max. Length A Max. Height difference B Gas Liquid

MUZ-SF25/35/42 20 12 9.52

6.35

MUZ-SF50 30 15 12.7

ADDITIONAL REFRIGERANT CHARGE (R410A: g)

Model

Outdoor unit

precharged

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

MUZ-SF25 700

0 30 60 90 120 150 180 210 240 390

MUZ-SF35 800 MUZ-SF42 1,150

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-SF50 1,550 0 60 160 260 360 460

Calculation: X g = 20 g/m × (Refrigerant piping length (m) – 7) NOTE: Refrigerant piping exceeding 7 m requires additional refrigerant charge according to the calculation.

OBH629A

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-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH MUZ-SF42VE MUZ-SF42VEH MUZ-SF50VE MUZ-SF50VEH

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( )

14.2

13.0

11.8

10.7

9.7

8.6

7.6

MUZ-SF50VE

MUZ-SF50VEH

MUZ-SF42VE

MUZ-SF42VEH

MUZ-SF35VE

MUZ-SF35VEH

MUZ-SF25VE

MUZ-SF25VEH

Indoor air Wet-bulb temperature

difference (°C)

7.6

7.0

6.4

5.9

5.3

4.8

4.3

11.3

10.4

9.5

8.6

7.8

7.0

6.2

16.0

14.6

13.3

12.0

10.8

9.6

8.5

8-1. CAPACITY AND INPUT CURVES

PERFORMANCE CURVES8

OBH629A

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)

6.4

5.9

5.3

4.8

4.3

3.8

9.5

8.6

7.8

7.0

6.2

5.4

11.8

10.7

9.7

8.6

7.6

6.7

13.3

12.0

10.8

9.6

8.5

7.4

MUZ-SF50VE

MUZ-SF50VEH

MUZ-SF42VE

MUZ-SF42VEH

MUZ-SF35VE

MUZ-SF35VEH

MUZ-SF25VE

MUZ-SF25VEH

Total input (Cooling :

at Rated frequency

)

Indoor air Dry-bulb temperature

difference (°C)

20.3

18.8

17.2

15.6

14.1

12.5

10.9

9.4

7.8

6.3

32.1

29.6

27.2

24.7

22.2

19.8

17.3

14.8

12.3

9.9

31.6

29.2

26.7

24.3

21.9

19.4

17.0

14.6

12.2

9.7

MUZ-SF50VE

MUZ-SF50VEH

MUZ-SF42VE

MUZ-SF42VEH

MUZ-SF25VEH

MUZ-SF35VE

23.8

21.9

20.1

18.3

16.5

14.6

12.8

11.0

9.1

7.3

MUZ-SF35VEH

MUZ-SF25VE

Outdoor intake air Wet-bulb temperature (°C)

-20 -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

20 26

Indoor intake air Dry-bulb temperature ( )

Indoor air Dry-bulb temperature

difference (°C)

20.3

18.8

17.2

15.6

14.1

12.5

10.9

9.4

7.8

6.3

MUZ-SF50VE

MUZ-SF50VEH

MUZ-SF42VE

MUZ-SF42VEH

MUZ-SF25VEH

MUZ-SF25VE

23.8

21.9

20.1

18.3

16.5

14.6

12.8

11.0

9.1

7.3

MUZ-SF35VEH

MUZ-SF35VE

32.1

29.6

27.2

24.7

22.2

19.8

17.3

14.8

12.3

9.9

31.6

29.2

26.7

24.3

21.9

19.4

17.0

14.6

12.2

9.7

Outdoor intake air Wet-bulb temperature (°C)

-20 -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 ( )

Lower limit of guaranteed oerating range in heating MUZ-SF25/35/42/50VE: -15°C MUZ-SF25/35/42/50VEH: -20°C

OBH629A

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

0 50 100

0.0

0.5

1.0

1.5

0 50 100

0.0

0.5

1.0

1.5

0 50 100

0.0

0.5

1.0

1.5

0 50 100

0.0

0.5

1.0

1.5

2.0

0 50 100

150

0.0

0.5

1.0

1.5

050100

150

0.0

0.5

1.0

1.5

050100

150

0.0

0.5

1.0

1.5

050100

150

0.0

0.5

1.0

1.5

2.0

0 50 100

0.0

0.5

1.0

1.5

0 50 100

0.0

0.5

1.0

1.5

2.0

0 50 100

0.0

0.5

1.0

1.5

0 50 100

0.0

0.5

1.0

1.5

2.0

050100

150

0.0

0.5

1.0

1.5

0 50 100

150

0.0

0.5

1.0

1.5

2.0

0 50 100

150

0.0

0.5

1.0

1.5

0 50 100

150

0.0

0.5

1.0

1.5

2.0

MUZ-SF25VE MUZ-SF25VEH

MUZ-SF35VE MUZ-SF35VEH

Correction of Cooling capacity

Capacity correction factors

Correction of Cooling input

Input correction factors

Correction of Heating capacity

Capacity correction factors

MUZ-SF42VE MUZ-SF42VEH

Correction of Heating input

Capacity correction factors

Correction of Cooling capacity

Capacity correction factors

Correction of Cooling input

Input correction factors

Correction of Heating capacity

Capacity correction factors

MUZ-SF50VE MUZ-SF50VEH

Correction of Heating input

Capacity correction factors

The operational frequency of compressor (Hz)

The operationalfrequency of compressor (Hz)

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

OBH629A

15 20 25 30 35

0.4

0.5

0.6

0.7

0.8

0.9

15 20 25 30 35

0.3

0.4

0.5

0.6

15 20 25 30 35

0.3

0.4

0.5

0.6

0.7

0.8

15 20 25 30 35

0.3

0.4

0.5

0.6

0.7

(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(%)

50 60 70

Ambient temperature(°C) Ambient humidity(%)

50 60 70

Ambient temperature(°C) Ambient humidity(%)

Outdoor low pressure

MUZ-SF25VE MUZ-SF25VEH

MUZ-SF35VE MUZ-SF35VEH

MUZ-SF42VE MUZ-SF42VEH

MUZ-SF50VE MUZ-SF50VEH

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

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.

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/cm

[Gauge])

OBH629A

15 20 25 30 35

1.5

2.0

2.5

3.0

15 20 25 30 35

3.0

3.5

4.0

4.5

5.0

15 20 25 30 35

3.5

4.0

4.5

5.0

5.5

6.0

Ambient temperature(°C) Ambient humidity(%)

Ambient temperature (°C) Ambient humidity(%)

Outdoor current (A)Outdoor current (A)

Ambient temperature (°C) Ambient humidity(%)

Outdoor current (A)

MUZ-SF35VE MUZ-SF35VEHMUZ-SF25VE MUZ-SF25VEH

Outdoor unit current

MUZ-SF42VE MUZ-SF42VEH

MUZ-SF50VE MUZ-SF50VEH

0510

15 20 25

1.5

2.0

2.5

3.0

0510

20 25

4.0

4.5

5.0

5.5

6.0

0510

15 20 25

2.5

3.0

3.5

4.0

0510

4.0

4.5

5.0

5.5

6.0

Ambient temperature (°C)

Outdoor current (A)

Ambient temperature (°C)

Outdoor current (A)

Ambient temperature (°C)

Outdoor current (A)

Ambient temperature (°C)

Outdoor current (A)

MUZ-SF35VE MUZ-SF35VEHMUZ-SF25VE MUZ-SF25VEH

Outdoor unit current

MUZ-SF42VE MUZ-SF42VEH

MUZ-SF50VE MUZ-SF50VEH

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

OBH629A

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-SF25VE MUZ-SF25VEH

CAPACITY: 2.5 kW SHF: 0.92 INPUT: 600 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 2.17 0.74 480 2.81 2.08 0.74 504 2.70 2.00 0.74 528 2.60 1.92 0.74 552 21 20 3.06 1.90 0.62 504 2.94 1.82 0.62 534 2.85 1.77 0.62 546 2.75 1.71 0.62 570 22 18 2.94 2.29 0.78 480 2.81 2.19 0.78 504 2.70 2.11 0.78 528 2.60 2.03 0.78 552 22 20 3.06 2.02 0.66 504 2.94 1.94 0.66 534 2.85 1.88 0.66 546 2.75 1.82 0.66 570 22 22 3.19 1.72 0.54 522 3.08 1.66 0.54 555 3.00 1.62 0.54 570 2.88 1.55 0.54 594 23 18 2.94 2.41 0.82 480 2.81 2.31 0.82 504 2.70 2.21 0.82 528 2.60 2.13 0.82 552 23 20 3.06 2.14 0.70 504 2.94 2.06 0.70 534 2.85 2.00 0.70 546 2.75 1.93 0.70 570 23 22 3.19 1.85 0.58 522 3.08 1.78 0.58 555 3.00 1.74 0.58 570 2.88 1.67 0.58 594 24 18 2.94 2.53 0.86 480 2.81 2.42 0.86 504 2.70 2.32 0.86 528 2.60 2.24 0.86 552 24 20 3.06 2.27 0.74 504 2.94 2.17 0.74 534 2.85 2.11 0.74 546 2.75 2.04 0.74 570 24 22 3.19 1.98 0.62 522 3.08 1.91 0.62 555 3.00 1.86 0.62 570 2.88 1.78 0.62 594 24 24 3.35 1.68 0.50 546 3.23 1.61 0.50 576 3.15 1.58 0.50 594 3.05 1.53 0.50 624 25 18 2.94 2.64 0.90 480 2.81 2.53 0.90 504 2.70 2.43 0.90 528 2.60 2.34 0.90 552 25 20 3.06 2.39 0.78 504 2.94 2.29 0.78 534 2.85 2.22 0.78 546 2.75 2.15 0.78 570 25 22 3.19 2.10 0.66 522 3.08 2.03 0.66 555 3.00 1.98 0.66 570 2.88 1.90 0.66 594 25 24 3.35 1.81 0.54 546 3.23 1.74 0.54 576 3.15 1.70 0.54 594 3.05 1.65 0.54 624 26 18 2.94 2.76 0.94 480 2.81 2.64 0.94 504 2.70 2.54 0.94 528 2.60 2.44 0.94 552 26 20 3.06 2.51 0.82 504 2.94 2.41 0.82 534 2.85 2.34 0.82 546 2.75 2.26 0.82 570 26 22 3.19 2.23 0.70 522 3.08 2.15 0.70 555 3.00 2.10 0.70 570 2.88 2.01 0.70 594 26 24 3.35 1.94 0.58 546 3.23 1.87 0.58 576 3.15 1.83 0.58 594 3.05 1.77 0.58 624 26 26 3.45 1.59 0.46 576 3.35 1.54 0.46 606 3.30 1.52 0.46 624 3.20 1.47 0.46 642 27 18 2.94 2.88 0.98 480 2.81 2.76 0.98 504 2.70 2.65 0.98 528 2.60 2.55 0.98 552 27 20 3.06 2.63 0.86 504 2.94 2.53 0.86 534 2.85 2.45 0.86 546 2.75 2.37 0.86 570 27 22 3.19 2.36 0.74 522 3.08 2.28 0.74 555 3.00 2.22 0.74 570 2.88 2.13 0.74 594 27 24 3.35 2.08 0.62 546 3.23 2.00 0.62 576 3.15 1.95 0.62 594 3.05 1.89 0.62 624 27 26 3.45 1.73 0.50 576 3.35 1.68 0.50 606 3.30 1.65 0.50 624 3.20 1.60 0.50 642 28 18 2.94 2.94 1.00 480 2.81 2.81 1.00 504 2.70 2.70 1.00 528 2.60 2.60 1.00 552 28 20 3.06 2.76 0.90 504 2.94 2.64 0.90 534 2.85 2.57 0.90 546 2.75 2.48 0.90 570 28 22 3.19 2.49 0.78 522 3.08 2.40 0.78 555 3.00 2.34 0.78 570 2.88 2.24 0.78 594 28 24 3.35 2.21 0.66 546 3.23 2.13 0.66 576 3.15 2.08 0.66 594 3.05 2.01 0.66 624 28 26 3.45 1.86 0.54 576 3.35 1.81 0.54 606 3.30 1.78 0.54 624 3.20 1.73 0.54 642 29 18 2.94 2.94 1.00 480 2.81 2.81 1.00 504 2.70 2.70 1.00 528 2.60 2.60 1.00 552 29 20 3.06 2.88 0.94 504 2.94 2.76 0.94 534 2.85 2.68 0.94 546 2.75 2.59 0.94 570 29 22 3.19 2.61 0.82 522 3.08 2.52 0.82 555 3.00 2.46 0.82 570 2.88 2.36 0.82 594 29 24 3.35 2.35 0.70 546 3.23 2.26 0.70 576 3.15 2.21 0.70 594 3.05 2.14 0.70 624 29 26 3.45 2.00 0.58 576 3.35 1.94 0.58 606 3.30 1.91 0.58 624 3.20 1.86 0.58 642 30 18 2.94 2.94 1.00 480 2.81 2.81 1.00 504 2.70 2.70 1.00 528 2.60 2.60 1.00 552 30 20 3.06 3.00 0.98 504 2.94 2.88 0.98 534 2.85 2.79 0.98 546 2.75 2.70 0.98 570 30 22 3.19 2.74 0.86 522 3.08 2.64 0.86 555 3.00 2.58 0.86 570 2.88 2.47 0.86 594 30 24 3.35 2.48 0.74 546 3.23 2.39 0.74 576 3.15 2.33 0.74 594 3.05 2.26 0.74 624 30 26 3.45 2.14 0.62 576 3.35 2.08 0.62 606 3.30 2.05 0.62 624 3.20 1.98 0.62 642 31 18 2.94 2.94 1.00 480 2.81 2.81 1.00 504 2.70 2.70 1.00 528 2.60 2.60 1.00 552 31 20 3.06 3.06 1.00 504 2.94 2.94 1.00 534 2.85 2.85 1.00 546 2.75 2.75 1.00 570 31 22 3.19 2.87 0.90 522 3.08 2.77 0.90 555 3.00 2.70 0.90 570 2.88 2.59 0.90 594 31 24 3.35 2.61 0.78 546 3.23 2.52 0.78 576 3.15 2.46 0.78 594 3.05 2.38 0.78 624 31 26 3.45 2.28 0.66 576 3.35 2.21 0.66 606 3.30 2.18 0.66 624 3.20 2.11 0.66 642 32 18 2.94 2.94 1.00 480 2.81 2.81 1.00 504 2.70 2.70 1.00 528 2.60 2.60 1.00 552 32 20 3.06 3.06 1.00 504 2.94 2.94 1.00 534 2.85 2.85 1.00 546 2.75 2.75 1.00 570 32 22 3.19 3.00 0.94 522 3.08 2.89 0.94 555 3.00 2.82 0.94 570 2.88 2.70 0.94 594 32 24 3.35 2.75 0.82 546 3.23 2.64 0.82 576 3.15 2.58 0.82 594 3.05 2.50 0.82 624 32 26 3.45 2.42 0.70 576 3.35 2.35 0.70 606 3.30 2.31 0.70 624 3.20 2.24 0.70 642

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

OBH629A

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-SF25VE MUZ-SF25VEH

CAPACITY: 2.5 kW SHF: 0.92 INPUT: 600 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 1.81 0.74 588 2.25 1.67 0.74 624 2.08 1.54 0.74 648 21 20 2.58 1.60 0.62 612 2.40 1.49 0.62 642 2.23 1.38 0.62 678 22 18 2.45 1.91 0.78 588 2.25 1.76 0.78 624 2.08 1.62 0.78 648 22 20 2.58 1.70 0.66 612 2.40 1.58 0.66 642 2.23 1.47 0.66 678 22 22 2.73 1.47 0.54 636 2.55 1.38 0.54 672 2.38 1.28 0.54 696 23 18 2.45 2.01 0.82 588 2.25 1.85 0.82 624 2.08 1.70 0.82 648 23 20 2.58 1.80 0.70 612 2.40 1.68 0.70 642 2.23 1.56 0.70 678 23 22 2.73 1.58 0.58 636 2.55 1.48 0.58 672 2.38 1.38 0.58 696 24 18 2.45 2.11 0.86 588 2.25 1.94 0.86 624 2.08 1.78 0.86 648 24 20 2.58 1.91 0.74 612 2.40 1.78 0.74 642 2.23 1.65 0.74 678 24 22 2.73 1.69 0.62 636 2.55 1.58 0.62 672 2.38 1.47 0.62 696 24 24 2.88 1.44 0.50 660 2.70 1.35 0.50 690 2.55 1.28 0.50 720 25 18 2.45 2.21 0.90 588 2.25 2.03 0.90 624 2.08 1.87 0.9 648 25 20 2.58 2.01 0.78 612 2.40 1.87 0.78 642 2.23 1.74 0.78 678 25 22 2.73 1.80 0.66 636 2.55 1.68 0.66 672 2.38 1.57 0.66 696 25 24 2.88 1.55 0.54 660 2.70 1.46 0.54 690 2.55 1.38 0.54 720 26 18 2.45 2.30 0.94 588 2.25 2.12 0.94 624 2.08 1.95 0.94 648 26 20 2.58 2.11 0.82 612 2.40 1.97 0.82 642 2.23 1.82 0.82 678 26 22 2.73 1.91 0.70 636 2.55 1.79 0.70 672 2.38 1.66 0.70 696 26 24 2.88 1.67 0.58 660 2.70 1.57 0.58 690 2.55 1.48 0.58 720 26 26 3.03 1.39 0.46 684 2.85 1.31 0.46 714 2.68 1.23 0.46 744 27 18 2.45 2.40 0.98 588 2.25 2.21 0.98 624 2.08 2.03 0.98 648 27 20 2.58 2.21 0.86 612 2.40 2.06 0.86 642 2.23 1.91 0.86 678 27 22 2.73 2.02 0.74 636 2.55 1.89 0.74 672 2.38 1.76 0.74 696 27 24 2.88 1.78 0.62 660 2.70 1.67 0.62 690 2.55 1.58 0.62 720 27 26 3.03 1.51 0.50 684 2.85 1.43 0.50 714 2.68 1.34 0.50 744 28 18 2.45 2.45 1.00 588 2.25 2.25 1.00 624 2.08 2.08 1.00 648 28 20 2.58 2.32 0.90 612 2.40 2.16 0.90 642 2.23 2.00 0.90 678 28 22 2.73 2.13 0.78 636 2.55 1.99 0.78 672 2.38 1.85 0.78 696 28 24 2.88 1.90 0.66 660 2.70 1.78 0.66 690 2.55 1.68 0.66 720 28 26 3.03 1.63 0.54 684 2.85 1.54 0.54 714 2.68 1.44 0.54 744 29 18 2.45 2.45 1.00 588 2.25 2.25 1.00 624 2.08 2.08 1.00 648 29 20 2.58 2.42 0.94 612 2.40 2.26 0.94 642 2.23 2.09 0.94 678 29 22 2.73 2.23 0.82 636 2.55 2.09 0.82 672 2.38 1.95 0.82 696 29 24 2.88 2.01 0.70 660 2.70 1.89 0.70 690 2.55 1.79 0.70 720 29 26 3.03 1.75 0.58 684 2.85 1.65 0.58 714 2.68 1.55 0.58 744 30 18 2.45 2.45 1.00 588 2.25 2.25 1.00 624 2.08 2.08 1.00 648 30 20 2.58 2.52 0.98 612 2.40 2.35 0.98 642 2.23 2.18 0.98 678 30 22 2.73 2.34 0.86 636 2.55 2.19 0.86 672 2.38 2.04 0.86 696 30 24 2.88 2.13 0.74 660 2.70 2.00 0.74 690 2.55 1.89 0.74 720 30 26 3.03 1.88 0.62 684 2.85 1.77 0.62 714 2.68 1.66 0.62 744 31 18 2.45 2.45 1.00 588 2.25 2.25 1.00 624 2.08 2.08 1.00 648 31 20 2.58 2.58 1.00 612 2.40 2.40 1.00 642 2.23 2.23 1.00 678 31 22 2.73 2.45 0.90 636 2.55 2.30 0.90 672 2.38 2.14 0.90 696 31 24 2.88 2.24 0.78 660 2.70 2.11 0.78 690 2.55 1.99 0.78 720 31 26 3.03 2.00 0.66 684 2.85 1.88 0.66 714 2.68 1.77 0.66 744 32 18 2.45 2.45 1.00 588 2.25 2.25 1.00 624 2.08 2.08 1.00 648 32 20 2.58 2.58 1.00 612 2.40 2.40 1.00 642 2.23 2.23 1.00 678 32 22 2.73 2.56 0.94 636 2.55 2.40 0.94 672 2.38 2.23 0.94 696 32 24 2.88 2.36 0.82 660 2.70 2.21 0.82 690 2.55 2.09 0.82 720 32 26 3.03 2.12 0.70 684 2.85 2.00 0.70 714 2.68 1.87 0.70 744

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

OBH629A

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-SF35VE MUZ-SF35VEH

CAPACITY: 3.5 kW SHF: 0.80 INPUT: 1080 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 2.55 0.62 864 3.94 2.44 0.62 907 3.78 2.34 0.62 950 3.64 2.26 0.62 994 21 20 4.29 2.14 0.50 907 4.11 2.06 0.50 961 3.99 2.00 0.50 983 3.85 1.93 0.50 1026 22 18 4.11 2.71 0.66 864 3.94 2.60 0.66 907 3.78 2.49 0.66 950 3.64 2.40 0.66 994 22 20 4.29 2.32 0.54 907 4.11 2.22 0.54 961 3.99 2.15 0.54 983 3.85 2.08 0.54 1026 22 22 4.46 1.87 0.42 940 4.31 1.81 0.42 999 4.20 1.76 0.42 1026 4.03 1.69 0.42 1069 23 18 4.11 2.88 0.70 864 3.94 2.76 0.70 907 3.78 2.65 0.70 950 3.64 2.55 0.70 994 23 20 4.29 2.49 0.58 907 4.11 2.39 0.58 961 3.99 2.31 0.58 983 3.85 2.23 0.58 1026 23 22 4.46 2.05 0.46 940 4.31 1.98 0.46 999 4.20 1.93 0.46 1026 4.03 1.85 0.46 1069 24 18 4.11 3.04 0.74 864 3.94 2.91 0.74 907 3.78 2.80 0.74 950 3.64 2.69 0.74 994 24 20 4.29 2.66 0.62 907 4.11 2.55 0.62 961 3.99 2.47 0.62 983 3.85 2.39 0.62 1026 24 22 4.46 2.23 0.50 940 4.31 2.15 0.50 999 4.20 2.10 0.50 1026 4.03 2.01 0.50 1069 24 24 4.69 1.78 0.38 983 4.52 1.72 0.38 1037 4.41 1.68 0.38 1069 4.27 1.62 0.38 1123 25 18 4.11 3.21 0.78 864 3.94 3.07 0.78 907 3.78 2.95 0.78 950 3.64 2.84 0.78 994 25 20 4.29 2.83 0.66 907 4.11 2.71 0.66 961 3.99 2.63 0.66 983 3.85 2.54 0.66 1026 25 22 4.46 2.41 0.54 940 4.31 2.32 0.54 999 4.20 2.27 0.54 1026 4.03 2.17 0.54 1069 25 24 4.69 1.97 0.42 983 4.52 1.90 0.42 1037 4.41 1.85 0.42 1069 4.27 1.79 0.42 1123 26 18 4.11 3.37 0.82 864 3.94 3.23 0.82 907 3.78 3.10 0.82 950 3.64 2.98 0.82 994 26 20 4.29 3.00 0.70 907 4.11 2.88 0.70 961 3.99 2.79 0.70 983 3.85 2.70 0.70 1026 26 22 4.46 2.59 0.58 940 4.31 2.50 0.58 999 4.20 2.44 0.58 1026 4.03 2.33 0.58 1069 26 24 4.69 2.16 0.46 983 4.52 2.08 0.46 1037 4.41 2.03 0.46 1069 4.27 1.96 0.46 1123 26 26 4.83 1.64 0.34 1037 4.69 1.59 0.34 1091 4.62 1.57 0.34 1123 4.48 1.52 0.34 1156 27 18 4.11 3.54 0.86 864 3.94 3.39 0.86 907 3.78 3.25 0.86 950 3.64 3.13 0.86 994 27 20 4.29 3.17 0.74 907 4.11 3.04 0.74 961 3.99 2.95 0.74 983 3.85 2.85 0.74 1026 27 22 4.46 2.77 0.62 940 4.31 2.67 0.62 999 4.20 2.60 0.62 1026 4.03 2.50 0.62 1069 27 24 4.69 2.35 0.50 983 4.52 2.26 0.50 1037 4.41 2.21 0.50 1069 4.27 2.14 0.50 1123 27 26 4.83 1.84 0.38 1037 4.69 1.78 0.38 1091 4.62 1.76 0.38 1123 4.48 1.70 0.38 1156 28 18 4.11 3.70 0.90 864 3.94 3.54 0.90 907 3.78 3.40 0.90 950 3.64 3.28 0.90 994 28 20 4.29 3.34 0.78 907 4.11 3.21 0.78 961 3.99 3.11 0.78 983 3.85 3.00 0.78 1026 28 22 4.46 2.95 0.66 940 4.31 2.84 0.66 999 4.20 2.77 0.66 1026 4.03 2.66 0.66 1069 28 24 4.69 2.53 0.54 983 4.52 2.44 0.54 1037 4.41 2.38 0.54 1069 4.27 2.31 0.54 1123 28 26 4.83 2.03 0.42 1037 4.69 1.97 0.42 1091 4.62 1.94 0.42 1123 4.48 1.88 0.42 1156 29 18 4.11 3.87 0.94 864 3.94 3.70 0.94 907 3.78 3.55 0.94 950 3.64 3.42 0.94 994 29 20 4.29 3.52 0.82 907 4.11 3.37 0.82 961 3.99 3.27 0.82 983 3.85 3.16 0.82 1026 29 22 4.46 3.12 0.70 940 4.31 3.01 0.70 999 4.20 2.94 0.70 1026 4.03 2.82 0.70 1069 29 24 4.69 2.72 0.58 983 4.52 2.62 0.58 1037 4.41 2.56 0.58 1069 4.27 2.48 0.58 1123 29 26 4.83 2.22 0.46 1037 4.69 2.16 0.46 1091 4.62 2.13 0.46 1123 4.48 2.06 0.46 1156 30 18 4.11 4.03 0.98 864 3.94 3.86 0.98 907 3.78 3.70 0.98 950 3.64 3.57 0.98 994 30 20 4.29 3.69 0.86 907 4.11 3.54 0.86 961 3.99 3.43 0.86 983 3.85 3.31 0.86 1026 30 22 4.46 3.30 0.74 940 4.31 3.19 0.74 999 4.20 3.11 0.74 1026 4.03 2.98 0.74 1069 30 24 4.69 2.91 0.62 983 4.52 2.80 0.62 1037 4.41 2.73 0.62 1069 4.27 2.65 0.62 1123 30 26 4.83 2.42 0.50 1037 4.69 2.35 0.50 1091 4.62 2.31 0.50 1123 4.48 2.24 0.50 1156 31 18 4.11 4.11 1.00 864 3.94 3.94 1.00 907 3.78 3.78 1.00 950 3.64 3.64 1.00 994 31 20 4.29 3.86 0.90 907 4.11 3.70 0.90 961 3.99 3.59 0.90 983 3.85 3.47 0.90 1026 31 22 4.46 3.48 0.78 940 4.31 3.36 0.78 999 4.20 3.28 0.78 1026 4.03 3.14 0.78 1069 31 24 4.69 3.10 0.66 983 4.52 2.98 0.66 1037 4.41 2.91 0.66 1069 4.27 2.82 0.66 1123 31 26 4.83 2.61 0.54 1037 4.69 2.53 0.54 1091 4.62 2.49 0.54 1123 4.48 2.42 0.54 1156 32 18 4.11 4.11 1.00 864 3.94 3.94 1.00 907 3.78 3.78 1.00 950 3.64 3.64 1.00 994 32 20 4.29 4.03 0.94 907 4.11 3.87 0.94 961 3.99 3.75 0.94 983 3.85 3.62 0.94 1026 32 22 4.46 3.66 0.82 940 4.31 3.53 0.82 999 4.20 3.44 0.82 1026 4.03 3.30 0.82 1069 32 24 4.69 3.28 0.70 983 4.52 3.16 0.70 1037 4.41 3.09 0.70 1069 4.27 2.99 0.70 1123 32 26 4.83 2.80 0.58 1037 4.69 2.72 0.58 1091 4.62 2.68 0.58 1123 4.48 2.60 0.58 1156

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

OBH629A

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-SF35VE MUZ-SF35VEH

CAPACITY: 3.5 kW SHF: 0.80 INPUT: 1080 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 2.13 0.62 1058 3.15 1.95 0.62 1123 2.91 1.80 0.62 1166 21 20 3.61 1.80 0.50 1102 3.36 1.68 0.50 1156 3.12 1.56 0.50 1220 22 18 3.43 2.26 0.66 1058 3.15 2.08 0.66 1123 2.91 1.92 0.66 1166 22 20 3.61 1.95 0.54 1102 3.36 1.81 0.54 1156 3.12 1.68 0.54 1220 22 22 3.82 1.60 0.42 1145 3.57 1.50 0.42 1210 3.33 1.40 0.42 1253 23 18 3.43 2.40 0.70 1058 3.15 2.21 0.70 1123 2.91 2.03 0.70 1166 23 20 3.61 2.09 0.58 1102 3.36 1.95 0.58 1156 3.12 1.81 0.58 1220 23 22 3.82 1.75 0.46 1145 3.57 1.64 0.46 1210 3.33 1.53 0.46 1253 24 18 3.43 2.54 0.74 1058 3.15 2.33 0.74 1123 2.91 2.15 0.74 1166 24 20 3.61 2.24 0.62 1102 3.36 2.08 0.62 1156 3.12 1.93 0.62 1220 24 22 3.82 1.91 0.50 1145 3.57 1.79 0.50 1210 3.33 1.66 0.50 1253 24 24 4.03 1.53 0.38 1188 3.78 1.44 0.38 1242 3.57 1.36 0.38 1296 25 18 3.43 2.68 0.78 1058 3.15 2.46 0.78 1123 2.91 2.27 0.78 1166 25 20 3.61 2.38 0.66 1102 3.36 2.22 0.66 1156 3.12 2.06 0.66 1220 25 22 3.82 2.06 0.54 1145 3.57 1.93 0.54 1210 3.33 1.80 0.54 1253 25 24 4.03 1.69 0.42 1188 3.78 1.59 0.42 1242 3.57 1.50 0.42 1296 26 18 3.43 2.81 0.82 1058 3.15 2.58 0.82 1123 2.91 2.38 0.82 1166 26 20 3.61 2.52 0.70 1102 3.36 2.35 0.70 1156 3.12 2.18 0.70 1220 26 22 3.82 2.21 0.58 1145 3.57 2.07 0.58 1210 3.33 1.93 0.58 1253 26 24 4.03 1.85 0.46 1188 3.78 1.74 0.46 1242 3.57 1.64 0.46 1296 26 26 4.24 1.44 0.34 1231 3.99 1.36 0.34 1285 3.75 1.27 0.34 1339 27 18 3.43 2.95 0.86 1058 3.15 2.71 0.86 1123 2.91 2.50 0.86 1166 27 20 3.61 2.67 0.74 1102 3.36 2.49 0.74 1156 3.12 2.31 0.74 1220 27 22 3.82 2.37 0.62 1145 3.57 2.21 0.62 1210 3.33 2.06 0.62 1253 27 24 4.03 2.01 0.50 1188 3.78 1.89 0.50 1242 3.57 1.79 0.50 1296 27 26 4.24 1.61 0.38 1231 3.99 1.52 0.38 1285 3.75 1.42 0.38 1339 28 18 3.43 3.09 0.90 1058 3.15 2.84 0.90 1123 2.91 2.61 0.90 1166 28 20 3.61 2.81 0.78 1102 3.36 2.62 0.78 1156 3.12 2.43 0.78 1220 28 22 3.82 2.52 0.66 1145 3.57 2.36 0.66 1210 3.33 2.19 0.66 1253 28 24 4.03 2.17 0.54 1188 3.78 2.04 0.54 1242 3.57 1.93 0.54 1296 28 26 4.24 1.78 0.42 1231 3.99 1.68 0.42 1285 3.75 1.57 0.42 1339 29 18 3.43 3.22 0.94 1058 3.15 2.96 0.94 1123 2.91 2.73 0.94 1166 29 20 3.61 2.96 0.82 1102 3.36 2.76 0.82 1156 3.12 2.55 0.82 1220 29 22 3.82 2.67 0.70 1145 3.57 2.50 0.70 1210 3.33 2.33 0.70 1253 29 24 4.03 2.33 0.58 1188 3.78 2.19 0.58 1242 3.57 2.07 0.58 1296 29 26 4.24 1.95 0.46 1231 3.99 1.84 0.46 1285 3.75 1.72 0.46 1339 30 18 3.43 3.36 0.98 1058 3.15 3.09 0.98 1123 2.91 2.85 0.98 1166 30 20 3.61 3.10 0.86 1102 3.36 2.89 0.86 1156 3.12 2.68 0.86 1220 30 22 3.82 2.82 0.74 1145 3.57 2.64 0.74 1210 3.33 2.46 0.74 1253 30 24 4.03 2.50 0.62 1188 3.78 2.34 0.62 1242 3.57 2.21 0.62 1296 30 26 4.24 2.12 0.50 1231 3.99 2.00 0.50 1285 3.75 1.87 0.50 1339 31 18 3.43 3.43 1.00 1058 3.15 3.15 1.00 1123 2.91 2.91 1.00 1166 31 20 3.61 3.24 0.90 1102 3.36 3.02 0.90 1156 3.12 2.80 0.90 1220 31 22 3.82 2.98 0.78 1145 3.57 2.78 0.78 1210 3.33 2.59 0.78 1253 31 24 4.03 2.66 0.66 1188 3.78 2.49 0.66 1242 3.57 2.36 0.66 1296 31 26 4.24 2.29 0.54 1231 3.99 2.15 0.54 1285 3.75 2.02 0.54 1339 32 18 3.43 3.43 1.00 1058 3.15 3.15 1.00 1123 2.91 2.91 1.00 1166 32 20 3.61 3.39 0.94 1102 3.36 3.16 0.94 1156 3.12 2.93 0.94 1220 32 22 3.82 3.13 0.82 1145 3.57 2.93 0.82 1210 3.33 2.73 0.82 1253 32 24 4.03 2.82 0.70 1188 3.78 2.65 0.70 1242 3.57 2.50 0.70 1296 32 26 4.24 2.46 0.58 1231 3.99 2.31 0.58 1285 3.75 2.17 0.58 1339

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

OBH629A

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-SF42VE MUZ-SF42VEH

CAPACITY: 4.2 kW SHF: 0.72 INPUT: 1340 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 4.94 2.66 0.54 1072 4.73 2.55 0.54 1126 4.54 2.45 0.54 1179 4.37 2.36 0.54 1233 21 20 5.15 2.16 0.42 1126 4.94 2.07 0.42 1193 4.79 2.01 0.42 1219 4.62 1.94 0.42 1273 22 18 4.94 2.86 0.58 1072 4.73 2.74 0.58 1126 4.54 2.63 0.58 1179 4.37 2.53 0.58 1233 22 20 5.15 2.37 0.46 1126 4.94 2.27 0.46 1193 4.79 2.20 0.46 1219 4.62 2.13 0.46 1273 22 22 5.36 1.82 0.34 1166 5.17 1.76 0.34 1240 5.04 1.71 0.34 1273 4.83 1.64 0.34 1327 23 18 4.94 3.06 0.62 1072 4.73 2.93 0.62 1126 4.54 2.81 0.62 1179 4.37 2.71 0.62 1233 23 20 5.15 2.57 0.50 1126 4.94 2.47 0.50 1193 4.79 2.39 0.50 1219 4.62 2.31 0.50 1273 23 22 5.36 2.03 0.38 1166 5.17 1.96 0.38 1240 5.04 1.92 0.38 1273 4.83 1.84 0.38 1327 24 18 4.94 3.26 0.66 1072 4.73 3.12 0.66 1126 4.54 2.99 0.66 1179 4.37 2.88 0.66 1233 24 20 5.15 2.78 0.54 1126 4.94 2.66 0.54 1193 4.79 2.59 0.54 1219 4.62 2.49 0.54 1273 24 22 5.36 2.25 0.42 1166 5.17 2.17 0.42 1240 5.04 2.12 0.42 1273 4.83 2.03 0.42 1327 24 24 5.63 1.69 0.30 1219 5.42 1.63 0.30 1286 5.29 1.59 0.30 1327 5.12 1.54 0.30 1394 25 18 4.94 3.45 0.70 1072 4.73 3.31 0.70 1126 4.54 3.18 0.70 1179 4.37 3.06 0.70 1233 25 20 5.15 2.98 0.58 1126 4.94 2.86 0.58 1193 4.79 2.78 0.58 1219 4.62 2.68 0.58 1273 25 22 5.36 2.46 0.46 1166 5.17 2.38 0.46 1240 5.04 2.32 0.46 1273 4.83 2.22 0.46 1327 25 24 5.63 1.91 0.34 1219 5.42 1.84 0.34 1286 5.29 1.80 0.34 1327 5.12 1.74 0.34 1394 26 18 4.94 3.65 0.74 1072 4.73 3.50 0.74 1126 4.54 3.36 0.74 1179 4.37 3.23 0.74 1233 26 20 5.15 3.19 0.62 1126 4.94 3.06 0.62 1193 4.79 2.97 0.62 1219 4.62 2.86 0.62 1273 26 22 5.36 2.68 0.50 1166 5.17 2.58 0.50 1240 5.04 2.52 0.50 1273 4.83 2.42 0.50 1327 26 24 5.63 2.14 0.38 1219 5.42 2.06 0.38 1286 5.29 2.01 0.38 1327 5.12 1.95 0.38 1394 26 26 5.80 1.51 0.26 1286 5.63 1.46 0.26 1353 5.54 1.44 0.26 1394 5.38 1.40 0.26 1434 27 18 4.94 3.85 0.78 1072 4.73 3.69 0.78 1126 4.54 3.54 0.78 1179 4.37 3.41 0.78 1233 27 20 5.15 3.40 0.66 1126 4.94 3.26 0.66 1193 4.79 3.16 0.66 1219 4.62 3.05 0.66 1273 27 22 5.36 2.89 0.54 1166 5.17 2.79 0.54 1240 5.04 2.72 0.54 1273 4.83 2.61 0.54 1327 27 24 5.63 2.36 0.42 1219 5.42 2.28 0.42 1286 5.29 2.22 0.42 1327 5.12 2.15 0.42 1394 27 26 5.80 1.74 0.30 1286 5.63 1.69 0.30 1353 5.54 1.66 0.30 1394 5.38 1.61 0.30 1434 28 18 4.94 4.05 0.82 1072 4.73 3.87 0.82 1126 4.54 3.72 0.82 1179 4.37 3.58 0.82 1233 28 20 5.15 3.60 0.70 1126 4.94 3.45 0.70 1193 4.79 3.35 0.70 1219 4.62 3.23 0.70 1273 28 22 5.36 3.11 0.58 1166 5.17 3.00 0.58 1240 5.04 2.92 0.58 1273 4.83 2.80 0.58 1327 28 24 5.63 2.59 0.46 1219 5.42 2.49 0.46 1286 5.29 2.43 0.46 1327 5.12 2.36 0.46 1394 28 26 5.80 1.97 0.34 1286 5.63 1.91 0.34 1353 5.54 1.88 0.34 1394 5.38 1.83 0.34 1434 29 18 4.94 4.24 0.86 1072 4.73 4.06 0.86 1126 4.54 3.90 0.86 1179 4.37 3.76 0.86 1233 29 20 5.15 3.81 0.74 1126 4.94 3.65 0.74 1193 4.79 3.54 0.74 1219 4.62 3.42 0.74 1273 29 22 5.36 3.32 0.62 1166 5.17 3.20 0.62 1240 5.04 3.12 0.62 1273 4.83 2.99 0.62 1327 29 24 5.63 2.81 0.50 1219 5.42 2.71 0.50 1286 5.29 2.65 0.50 1327 5.12 2.56 0.50 1394 29 26 5.80 2.20 0.38 1286 5.63 2.14 0.38 1353 5.54 2.11 0.38 1394 5.38 2.04 0.38 1434 30 18 4.94 4.44 0.90 1072 4.73 4.25 0.90 1126 4.54 4.08 0.90 1179 4.37 3.93 0.90 1233 30 20 5.15 4.01 0.78 1126 4.94 3.85 0.78 1193 4.79 3.73 0.78 1219 4.62 3.60 0.78 1273 30 22 5.36 3.53 0.66 1166 5.17 3.41 0.66 1240 5.04 3.33 0.66 1273 4.83 3.19 0.66 1327 30 24 5.63 3.04 0.54 1219 5.42 2.93 0.54 1286 5.29 2.86 0.54 1327 5.12 2.77 0.54 1394 30 26 5.80 2.43 0.42 1286 5.63 2.36 0.42 1353 5.54 2.33 0.42 1394 5.38 2.26 0.42 1434 31 18 4.94 4.64 0.94 1072 4.73 4.44 0.94 1126 4.54 4.26 0.94 1179 4.37 4.11 0.94 1233 31 20 5.15 4.22 0.82 1126 4.94 4.05 0.82 1193 4.79 3.93 0.82 1219 4.62 3.79 0.82 1273 31 22 5.36 3.75 0.70 1166 5.17 3.62 0.70 1240 5.04 3.53 0.70 1273 4.83 3.38 0.70 1327 31 24 5.63 3.26 0.58 1219 5.42 3.14 0.58 1286 5.29 3.07 0.58 1327 5.12 2.97 0.58 1394 31 26 5.80 2.67 0.46 1286 5.63 2.59 0.46 1353 5.54 2.55 0.46 1394 5.38 2.47 0.46 1434 32 18 4.94 4.84 0.98 1072 4.73 4.63 0.98 1126 4.54 4.45 0.98 1179 4.37 4.28 0.98 1233 32 20 5.15 4.42 0.86 1126 4.94 4.24 0.86 1193 4.79 4.12 0.86 1219 4.62 3.97 0.86 1273 32 22 5.36 3.96 0.74 1166 5.17 3.82 0.74 1240 5.04 3.73 0.74 1273 4.83 3.57 0.74 1327 32 24 5.63 3.49 0.62 1219 5.42 3.36 0.62 1286 5.29 3.28 0.62 1327 5.12 3.18 0.62 1394 32 26 5.80 2.90 0.50 1286 5.63 2.81 0.50 1353 5.54 2.77 0.50 1394 5.38 2.69 0.50 1434

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

OBH629A

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-SF42VE MUZ-SF42VEH

CAPACITY: 4.2 kW SHF: 0.72 INPUT: 1340 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 4.12 2.22 0.54 1313 3.78 2.04 0.54 1394 3.49 1.88 0.54 1447 21 20 4.33 1.82 0.42 1367 4.03 1.69 0.42 1434 3.74 1.57 0.42 1514 22 18 4.12 2.39 0.58 1313 3.78 2.19 0.58 1394 3.49 2.02 0.58 1447 22 20 4.33 1.99 0.46 1367 4.03 1.85 0.46 1434 3.74 1.72 0.46 1514 22 22 4.58 1.56 0.34 1420 4.28 1.46 0.34 1501 3.99 1.36 0.34 1554 23 18 4.12 2.55 0.62 1313 3.78 2.34 0.62 1394 3.49 2.16 0.62 1447 23 20 4.33 2.16 0.50 1367 4.03 2.02 0.50 1434 3.74 1.87 0.50 1514 23 22 4.58 1.74 0.38 1420 4.28 1.63 0.38 1501 3.99 1.52 0.38 1554 24 18 4.12 2.72 0.66 1313 3.78 2.49 0.66 1394 3.49 2.30 0.66 1447 24 20 4.33 2.34 0.54 1367 4.03 2.18 0.54 1434 3.74 2.02 0.54 1514 24 22 4.58 1.92 0.42 1420 4.28 1.80 0.42 1501 3.99 1.68 0.42 1554 24 24 4.83 1.45 0.30 1474 4.54 1.36 0.30 1541 4.28 1.29 0.30 1608 25 18 4.12 2.88 0.70 1313 3.78 2.65 0.70 1394 3.49 2.44 0.7 1447 25 20 4.33 2.51 0.58 1367 4.03 2.34 0.58 1434 3.74 2.17 0.58 1514 25 22 4.58 2.11 0.46 1420 4.28 1.97 0.46 1501 3.99 1.84 0.46 1554 25 24 4.83 1.64 0.34 1474 4.54 1.54 0.34 1541 4.28 1.46 0.34 1608 26 18 4.12 3.05 0.74 1313 3.78 2.80 0.74 1394 3.49 2.58 0.74 1447 26 20 4.33 2.68 0.62 1367 4.03 2.50 0.62 1434 3.74 2.32 0.62 1514 26 22 4.58 2.29 0.50 1420 4.28 2.14 0.50 1501 3.99 2.00 0.50 1554 26 24 4.83 1.84 0.38 1474 4.54 1.72 0.38 1541 4.28 1.63 0.38 1608 26 26 5.08 1.32 0.26 1528 4.79 1.24 0.26 1595 4.49 1.17 0.26 1662 27 18 4.12 3.21 0.78 1313 3.78 2.95 0.78 1394 3.49 2.72 0.78 1447 27 20 4.33 2.86 0.66 1367 4.03 2.66 0.66 1434 3.74 2.47 0.66 1514 27 22 4.58 2.47 0.54 1420 4.28 2.31 0.54 1501 3.99 2.15 0.54 1554 27 24 4.83 2.03 0.42 1474 4.54 1.91 0.42 1541 4.28 1.80 0.42 1608 27 26 5.08 1.52 0.30 1528 4.79 1.44 0.30 1595 4.49 1.35 0.30 1662 28 18 4.12 3.38 0.82 1313 3.78 3.10 0.82 1394 3.49 2.86 0.82 1447 28 20 4.33 3.03 0.70 1367 4.03 2.82 0.70 1434 3.74 2.62 0.70 1514 28 22 4.58 2.66 0.58 1420 4.28 2.48 0.58 1501 3.99 2.31 0.58 1554 28 24 4.83 2.22 0.46 1474 4.54 2.09 0.46 1541 4.28 1.97 0.46 1608 28 26 5.08 1.73 0.34 1528 4.79 1.63 0.34 1595 4.49 1.53 0.34 1662 29 18 4.12 3.54 0.86 1313 3.78 3.25 0.86 1394 3.49 3.00 0.86 1447 29 20 4.33 3.20 0.74 1367 4.03 2.98 0.74 1434 3.74 2.77 0.74 1514 29 22 4.58 2.84 0.62 1420 4.28 2.66 0.62 1501 3.99 2.47 0.62 1554 29 24 4.83 2.42 0.50 1474 4.54 2.27 0.50 1541 4.28 2.14 0.50 1608 29 26 5.08 1.93 0.38 1528 4.79 1.82 0.38 1595 4.49 1.71 0.38 1662 30 18 4.12 3.70 0.90 1313 3.78 3.40 0.90 1394 3.49 3.14 0.90 1447 30 20 4.33 3.37 0.78 1367 4.03 3.14 0.78 1434 3.74 2.92 0.78 1514 30 22 4.58 3.02 0.66 1420 4.28 2.83 0.66 1501 3.99 2.63 0.66 1554 30 24 4.83 2.61 0.54 1474 4.54 2.45 0.54 1541 4.28 2.31 0.54 1608 30 26 5.08 2.13 0.42 1528 4.79 2.01 0.42 1595 4.49 1.89 0.42 1662 31 18 4.12 3.87 0.94 1313 3.78 3.55 0.94 1394 3.49 3.28 0.94 1447 31 20 4.33 3.55 0.82 1367 4.03 3.31 0.82 1434 3.74 3.07 0.82 1514 31 22 4.58 3.20 0.70 1420 4.28 3.00 0.70 1501 3.99 2.79 0.70 1554 31 24 4.83 2.80 0.58 1474 4.54 2.63 0.58 1541 4.28 2.48 0.58 1608 31 26 5.08 2.34 0.46 1528 4.79 2.20 0.46 1595 4.49 2.07 0.46 1662 32 18 4.12 4.03 0.98 1313 3.78 3.70 0.98 1394 3.49 3.42 0.98 1447 32 20 4.33 3.72 0.86 1367 4.03 3.47 0.86 1434 3.74 3.21 0.86 1514 32 22 4.58 3.39 0.74 1420 4.28 3.17 0.74 1501 3.99 2.95 0.74 1554 32 24 4.83 2.99 0.62 1474 4.54 2.81 0.62 1541 4.28 2.66 0.62 1608 32 26 5.08 2.54 0.50 1528 4.79 2.39 0.50 1595 4.49 2.25 0.50 1662

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

OBH629A

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-SF50VE MUZ-SF50VEH

CAPACITY: 5.0 kW SHF: 0.70 INPUT: 1660 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 3.06 0.52 1328 5.63 2.93 0.52 1394 5.40 2.81 0.52 1461 5.20 2.70 0.52 1527 21 20 6.13 2.45 0.40 1394 5.88 2.35 0.40 1477 5.70 2.28 0.40 1511 5.50 2.20 0.40 1577 22 18 5.88 3.29 0.56 1328 5.63 3.15 0.56 1394 5.40 3.02 0.56 1461 5.20 2.91 0.56 1527 22 20 6.13 2.70 0.44 1394 5.88 2.59 0.44 1477 5.70 2.51 0.44 1511 5.50 2.42 0.44 1577 22 22 6.38 2.04 0.32 1444 6.15 1.97 0.32 1536 6.00 1.92 0.32 1577 5.75 1.84 0.32 1643 23 18 5.88 3.53 0.60 1328 5.63 3.38 0.60 1394 5.40 3.24 0.60 1461 5.20 3.12 0.60 1527 23 20 6.13 2.94 0.48 1394 5.88 2.82 0.48 1477 5.70 2.74 0.48 1511 5.50 2.64 0.48 1577 23 22 6.38 2.30 0.36 1444 6.15 2.21 0.36 1536 6.00 2.16 0.36 1577 5.75 2.07 0.36 1643 24 18 5.88 3.76 0.64 1328 5.63 3.60 0.64 1394 5.40 3.46 0.64 1461 5.20 3.33 0.64 1527 24 20 6.13 3.19 0.52 1394 5.88 3.06 0.52 1477 5.70 2.96 0.52 1511 5.50 2.86 0.52 1577 24 22 6.38 2.55 0.40 1444 6.15 2.46 0.40 1536 6.00 2.40 0.40 1577 5.75 2.30 0.40 1643 24 24 6.70 1.88 0.28 1511 6.45 1.81 0.28 1594 6.30 1.76 0.28 1643 6.10 1.71 0.28 1726 25 18 5.88 4.00 0.68 1328 5.63 3.83 0.68 1394 5.40 3.67 0.68 1461 5.20 3.54 0.68 1527 25 20 6.13 3.43 0.56 1394 5.88 3.29 0.56 1477 5.70 3.19 0.56 1511 5.50 3.08 0.56 1577 25 22 6.38 2.81 0.44 1444 6.15 2.71 0.44 1536 6.00 2.64 0.44 1577 5.75 2.53 0.44 1643 25 24 6.70 2.14 0.32 1511 6.45 2.06 0.32 1594 6.30 2.02 0.32 1643 6.10 1.95 0.32 1726 26 18 5.88 4.23 0.72 1328 5.63 4.05 0.72 1394 5.40 3.89 0.72 1461 5.20 3.74 0.72 1527 26 20 6.13 3.68 0.60 1394 5.88 3.53 0.60 1477 5.70 3.42 0.60 1511 5.50 3.30 0.60 1577 26 22 6.38 3.06 0.48 1444 6.15 2.95 0.48 1536 6.00 2.88 0.48 1577 5.75 2.76 0.48 1643 26 24 6.70 2.41 0.36 1511 6.45 2.32 0.36 1594 6.30 2.27 0.36 1643 6.10 2.20 0.36 1726 26 26 6.90 1.66 0.24 1594 6.70 1.61 0.24 1677 6.60 1.58 0.24 1726 6.40 1.54 0.24 1776 27 18 5.88 4.47 0.76 1328 5.63 4.28 0.76 1394 5.40 4.10 0.76 1461 5.20 3.95 0.76 1527 27 20 6.13 3.92 0.64 1394 5.88 3.76 0.64 1477 5.70 3.65 0.64 1511 5.50 3.52 0.64 1577 27 22 6.38 3.32 0.52 1444 6.15 3.20 0.52 1536 6.00 3.12 0.52 1577 5.75 2.99 0.52 1643 27 24 6.70 2.68 0.40 1511 6.45 2.58 0.40 1594 6.30 2.52 0.40 1643 6.10 2.44 0.40 1726 27 26 6.90 1.93 0.28 1594 6.70 1.88 0.28 1677 6.60 1.85 0.28 1726 6.40 1.79 0.28 1776 28 18 5.88 4.70 0.80 1328 5.63 4.50 0.80 1394 5.40 4.32 0.80 1461 5.20 4.16 0.80 1527 28 20 6.13 4.17 0.68 1394 5.88 4.00 0.68 1477 5.70 3.88 0.68 1511 5.50 3.74 0.68 1577 28 22 6.38 3.57 0.56 1444 6.15 3.44 0.56 1536 6.00 3.36 0.56 1577 5.75 3.22 0.56 1643 28 24 6.70 2.95 0.44 1511 6.45 2.84 0.44 1594 6.30 2.77 0.44 1643 6.10 2.68 0.44 1726 28 26 6.90 2.21 0.32 1594 6.70 2.14 0.32 1677 6.60 2.11 0.32 1726 6.40 2.05 0.32 1776 29 18 5.88 4.94 0.84 1328 5.63 4.73 0.84 1394 5.40 4.54 0.84 1461 5.20 4.37 0.84 1527 29 20 6.13 4.41 0.72 1394 5.88 4.23 0.72 1477 5.70 4.10 0.72 1511 5.50 3.96 0.72 1577 29 22 6.38 3.83 0.60 1444 6.15 3.69 0.60 1536 6.00 3.60 0.60 1577 5.75 3.45 0.60 1643 29 24 6.70 3.22 0.48 1511 6.45 3.10 0.48 1594 6.30 3.02 0.48 1643 6.10 2.93 0.48 1726 29 26 6.90 2.48 0.36 1594 6.70 2.41 0.36 1677 6.60 2.38 0.36 1726 6.40 2.30 0.36 1776 30 18 5.88 5.17 0.88 1328 5.63 4.95 0.88 1394 5.40 4.75 0.88 1461 5.20 4.58 0.88 1527 30 20 6.13 4.66 0.76 1394 5.88 4.47 0.76 1477 5.70 4.33 0.76 1511 5.50 4.18 0.76 1577 30 22 6.38 4.08 0.64 1444 6.15 3.94 0.64 1536 6.00 3.84 0.64 1577 5.75 3.68 0.64 1643 30 24 6.70 3.48 0.52 1511 6.45 3.35 0.52 1594 6.30 3.28 0.52 1643 6.10 3.17 0.52 1726 30 26 6.90 2.76 0.40 1594 6.70 2.68 0.40 1677 6.60 2.64 0.40 1726 6.40 2.56 0.40 1776 31 18 5.88 5.41 0.92 1328 5.63 5.18 0.92 1394 5.40 4.97 0.92 1461 5.20 4.78 0.92 1527 31 20 6.13 4.90 0.80 1394 5.88 4.70 0.80 1477 5.70 4.56 0.80 1511 5.50 4.40 0.80 1577 31 22 6.38 4.34 0.68 1444 6.15 4.18 0.68 1536 6.00 4.08 0.68 1577 5.75 3.91 0.68 1643 31 24 6.70 3.75 0.56 1511 6.45 3.61 0.56 1594 6.30 3.53 0.56 1643 6.10 3.42 0.56 1726 31 26 6.90 3.04 0.44 1594 6.70 2.95 0.44 1677 6.60 2.90 0.44 1726 6.40 2.82 0.44 1776 32 18 5.88 5.64 0.96 1328 5.63 5.40 0.96 1394 5.40 5.18 0.96 1461 5.20 4.99 0.96 1527 32 20 6.13 5.15 0.84 1394 5.88 4.94 0.84 1477 5.70 4.79 0.84 1511 5.50 4.62 0.84 1577 32 22 6.38 4.59 0.72 1444 6.15 4.43 0.72 1536 6.00 4.32 0.72 1577 5.75 4.14 0.72 1643 32 24 6.70 4.02 0.60 1511 6.45 3.87 0.60 1594 6.30 3.78 0.60 1643 6.10 3.66 0.60 1726 32 26 6.90 3.31 0.48 1594 6.70 3.22 0.48 1677 6.60 3.17 0.48 1726 6.40 3.07 0.48 1776

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

OBH629A

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-SF50VE MUZ-SF50VEH

CAPACITY: 5.0 kW SHF: 0.70 INPUT: 1660 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 2.55 0.52 1627 4.50 2.34 0.52 1726 4.15 2.16 0.52 1793 21 20 5.15 2.06 0.40 1693 4.80 1.92 0.40 1776 4.45 1.78 0.40 1876 22 18 4.90 2.74 0.56 1627 4.50 2.52 0.56 1726 4.15 2.32 0.56 1793 22 20 5.15 2.27 0.44 1693 4.80 2.11 0.44 1776 4.45 1.96 0.44 1876 22 22 5.45 1.74 0.32 1760 5.10 1.63 0.32 1859 4.75 1.52 0.32 1926 23 18 4.90 2.94 0.60 1627 4.50 2.70 0.60 1726 4.15 2.49 0.60 1793 23 20 5.15 2.47 0.48 1693 4.80 2.30 0.48 1776 4.45 2.14 0.48 1876 23 22 5.45 1.96 0.36 1760 5.10 1.84 0.36 1859 4.75 1.71 0.36 1926 24 18 4.90 3.14 0.64 1627 4.50 2.88 0.64 1726 4.15 2.66 0.64 1793 24 20 5.15 2.68 0.52 1693 4.80 2.50 0.52 1776 4.45 2.31 0.52 1876 24 22 5.45 2.18 0.40 1760 5.10 2.04 0.40 1859 4.75 1.90 0.40 1926 24 24 5.75 1.61 0.28 1826 5.40 1.51 0.28 1909 5.10 1.43 0.28 1992 25 18 4.90 3.33 0.68 1627 4.50 3.06 0.68 1726 4.15 2.82 0.68 1793 25 20 5.15 2.88 0.56 1693 4.80 2.69 0.56 1776 4.45 2.49 0.56 1876 25 22 5.45 2.40 0.44 1760 5.10 2.24 0.44 1859 4.75 2.09 0.44 1926 25 24 5.75 1.84 0.32 1826 5.40 1.73 0.32 1909 5.10 1.63 0.32 1992 26 18 4.90 3.53 0.72 1627 4.50 3.24 0.72 1726 4.15 2.99 0.72 1793 26 20 5.15 3.09 0.60 1693 4.80 2.88 0.60 1776 4.45 2.67 0.60 1876 26 22 5.45 2.62 0.48 1760 5.10 2.45 0.48 1859 4.75 2.28 0.48 1926 26 24 5.75 2.07 0.36 1826 5.40 1.94 0.36 1909 5.10 1.84 0.36 1992 26 26 6.05 1.45 0.24 1892 5.70 1.37 0.24 1975 5.35 1.28 0.24 2058 27 18 4.90 3.72 0.76 1627 4.50 3.42 0.76 1726 4.15 3.15 0.76 1793 27 20 5.15 3.30 0.64 1693 4.80 3.07 0.64 1776 4.45 2.85 0.64 1876 27 22 5.45 2.83 0.52 1760 5.10 2.65 0.52 1859 4.75 2.47 0.52 1926 27 24 5.75 2.30 0.40 1826 5.40 2.16 0.40 1909 5.10 2.04 0.40 1992 27 26 6.05 1.69 0.28 1892 5.70 1.60 0.28 1975 5.35 1.50 0.28 2058 28 18 4.90 3.92 0.80 1627 4.50 3.60 0.80 1726 4.15 3.32 0.80 1793 28 20 5.15 3.50 0.68 1693 4.80 3.26 0.68 1776 4.45 3.03 0.68 1876 28 22 5.45 3.05 0.56 1760 5.10 2.86 0.56 1859 4.75 2.66 0.56 1926 28 24 5.75 2.53 0.44 1826 5.40 2.38 0.44 1909 5.10 2.24 0.44 1992 28 26 6.05 1.94 0.32 1892 5.70 1.82 0.32 1975 5.35 1.71 0.32 2058 29 18 4.90 4.12 0.84 1627 4.50 3.78 0.84 1726 4.15 3.49 0.84 1793 29 20 5.15 3.71 0.72 1693 4.80 3.46 0.72 1776 4.45 3.20 0.72 1876 29 22 5.45 3.27 0.60 1760 5.10 3.06 0.60 1859 4.75 2.85 0.60 1926 29 24 5.75 2.76 0.48 1826 5.40 2.59 0.48 1909 5.10 2.45 0.48 1992 29 26 6.05 2.18 0.36 1892 5.70 2.05 0.36 1975 5.35 1.93 0.36 2058 30 18 4.90 4.31 0.88 1627 4.50 3.96 0.88 1726 4.15 3.65 0.88 1793 30 20 5.15 3.91 0.76 1693 4.80 3.65 0.76 1776 4.45 3.38 0.76 1876 30 22 5.45 3.49 0.64 1760 5.10 3.26 0.64 1859 4.75 3.04 0.64 1926 30 24 5.75 2.99 0.52 1826 5.40 2.81 0.52 1909 5.10 2.65 0.52 1992 30 26 6.05 2.42 0.40 1892 5.70 2.28 0.40 1975 5.35 2.14 0.40 2058 31 18 4.90 4.51 0.92 1627 4.50 4.14 0.92 1726 4.15 3.82 0.92 1793 31 20 5.15 4.12 0.80 1693 4.80 3.84 0.80 1776 4.45 3.56 0.80 1876 31 22 5.45 3.71 0.68 1760 5.10 3.47 0.68 1859 4.75 3.23 0.68 1926 31 24 5.75 3.22 0.56 1826 5.40 3.02 0.56 1909 5.10 2.86 0.56 1992 31 26 6.05 2.66 0.44 1892 5.70 2.51 0.44 1975 5.35 2.35 0.44 2058 32 18 4.90 4.70 0.96 1627 4.50 4.32 0.96 1726 4.15 3.98 0.96 1793 32 20 5.15 4.33 0.84 1693 4.80 4.03 0.84 1776 4.45 3.74 0.84 1876 32 22 5.45 3.92 0.72 1760 5.10 3.67 0.72 1859 4.75 3.42 0.72 1926 32 24 5.75 3.45 0.60 1826 5.40 3.24 0.60 1909 5.10 3.06 0.60 1992 32 26 6.05 2.90 0.48 1892 5.70 2.74 0.48 1975 5.35 2.57 0.48 2058

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

OBH629A

PERFORMANCE DATA HEAT operation at Rated frequency

MUZ-SF25VE MUZ-SF25VEH

CAPACITY: 3.2 kW INPUT: 780 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 2.02 507 2.43 608 2.85 686 3.26 741 3.68 788 4.06 811 4.48 827 21 1.92 546 2.30 647 2.72 718 3.10 772 3.52 811 3.90 835 4.30 866 26 1.73 585 2.14 686 2.53 757 2.94 811 3.36 850 3.74 874 4.16 897

MUZ-SF35VE MUZ-SF35VEH

CAPACITY: 4.0 kW INPUT: 1030 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 2.52 670 3.04 803 3.56 906 4.08 979 4.60 1040 5.08 1071 5.60 1092 21 2.40 721 2.88 855 3.40 948 3.88 1020 4.40 1071 4.88 1102 5.38 1143 26 2.16 773 2.68 906 3.16 999 3.68 1071 4.20 1123 4.68 1154 5.20 1185

MUZ-SF42VE MUZ-SF42VEH

CAPACITY: 5.4 kW INPUT: 1580 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 3.40 1027 4.10 1232 4.81 1390 5.51 1501 6.21 1596 6.86 1643 7.56 1675 21 3.24 1106 3.89 1311 4.59 1454 5.24 1564 5.94 1643 6.59 1691 7.26 1754 26 2.92 1185 3.62 1390 4.27 1533 4.97 1643 5.67 1722 6.32 1770 7.02 1817

MUZ-SF50VE MUZ-SF50VEH

CAPACITY: 5.8 kW INPUT: 1700 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 3.65 1105 4.41 1326 5.16 1496 5.92 1615 6.67 1717 7.37 1768 8.12 1802 21 3.48 1190 4.18 1411 4.93 1564 5.63 1683 6.38 1768 7.08 1819 7.80 1887 26 3.13 1275 3.89 1496 4.58 1649 5.34 1768 6.09 1853 6.79 1904 7.54 1955

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

OBH629A

MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH MUZ-SF42VE MUZ-SF42VEH MUZ-SF50VE MUZ-SF50VEH

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

OBH629A

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-SF25/35/42 MUZ-SF50

Soldered (Initial setting) 5 9

None (Cut) 10 18

10-2. PRE-HEAT CONTROL SETTING

PRE-HEAT CONTROL

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

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

NOTE: When the inverter P.C. board is replaced, check the Jumper wires, and cut/solder them if necessary.

MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH MUZ-SF42VE MUZ-SF42VEH MUZ-SF50VE MUZ-SF50VEH

SERVICE FUNCTIONS

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.

MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH MUZ-SF42VE MUZ-SF42VEH MUZ-SF50VE MUZ-SF50VEH

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 service 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

OBH629A

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 the left lamp of OPERATION INDICATOR 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 the left lamp of OPERATION INDICATOR lamp. 2

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.

Judgment of indoor/outdoor abnormality

Before blinking, does the left lamp of OPERATION INDICATOR 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 conﬁ rm 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.

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 identify the abnormal point by reffering to 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 0.5second interval

2.5-second OFF 3-second ON

Blinking at 0.5second interval

Beeps

Repeated cycle

2.5-second OFF

Blinking at 0.5second interval

No beep Beeps

Repeated cycle

2.5-second OFF 3-second ON

Blinking at 0.5second interval

Repeated cycle

Beeps

OBH629A

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 the left lamp of OPERATION INDICATOR 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 the left lamp of OPERATION INDICATOR lamp. 2

Yes (Blinks

)

No (OFF)

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

Operational procedure

Make sure that the remote controller is set to the failure mode recall func-

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 by reffering to 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 the OPERATION INDICATOR lamp is not

lighting, keep checking at least 1 minute or longer.

OBH629A

3. Outdoor unit failure mode table

The left lamp of

OPERATION

INDICATOR

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 the 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. Reconnect

compressor connector. Refer to 11-5. "How to check inverter/ compressor". Check the 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 the 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 the refrigerant circuit and refrigerant amount. Check the 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, or temperature of P.C. board temperature thermistor on the inverter P.C. board exceeds 72 ~ 85°C.

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 6-time ﬂ ash

2.5 seconds OFF

The interface short circuit occurs in the output of the power module (IC700). 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 the refrigerant circuit and refrigerant amount.

•

• —

○

11-time ﬂ ash

2.5 seconds OFF

DC voltage 8-time ﬂ ash

2.5 seconds OFF

DC 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 the stop valve.•

○○

4-way valve/ Pipe temperature

16-time ﬂ ash

2.5 seconds OFF

The 4-way valve does not work properly. The indoor coil thermistor detects an abnormal temperature.

Check 4-way valve. Replace inverter P.C. board.

•

NOTE: Blinking patterns of this mode differ from the ones of Troubleshooting check table (11-3.).

OBH629A

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 the 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. (The left lamp of OPERATION INDICATOR 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.

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 the 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".

•

16-time ﬂ ash

2.5 seconds OFF

4-way valve/

Pipe temperature

The 4-way valve does not work properly. The indoor coil thermistor detects an abnormal temperature.

Refer to 11-5. "Check of R.V. coil". Replace inverter P.C. board.

•

'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.

Reconnect connector of compressor. Refer to 11-5. "How to check inverter/compressor". Check the 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 the 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 exceeds 75 ~ 86°C or temperature of P.C. board temperature thermistor on the inverter P.C.board exceeds 72 ~ 85°C.

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 the refrigerant circuit and refrigerant amount. Check the 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

DC voltage DC voltage of inverter cannot be detected normally. Refer to 11-5. "How to check in-

verter/compressor".

•

Outdoor unit operates.

1-time ﬂ ash

2.5 seconds OFF

Frequency drop by current protection

When the input current exceeds approximately 7A(EF25)/ 8A(EF35)/9A(EF42)/12A(EF50), compressor frequency lowers.

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

•

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

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

•

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.

•

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 the refrigerant circuit and the refrigerant amount.

•

8-time ﬂ ash

2.5 seconds OFF

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.

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 →

Inverter P.C. board

OBH629A

11-4. TROUBLE CRITERION OF MAIN PARTS

MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH MUZ-SF42VE MUZ-SF42VEH MUZ-SF50VE MUZ-SF50VEH

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-SF25 MUZ-SF35 MUZ-SF42 MUZ-SF50

U-V U-W V-W

1.20 ~ 1.72 1.36 ~ 1.93 1.52 ~ 2.17 0.78 ~ 1.11

Outdoor fan motor

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

Color of lead wire

Normal (Ω)

MUZ-SF25/35/42 MUZ-SF50

RED – BLK BLK – WHT WHT – RED

29 ~ 42 12 ~ 17

R. V. coil (21S4)

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

Normal (kΩ)

1.19 ~ 1.78

Expansion valve coil (LEV)

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

MUZ-SF25/35/42

Color of lead wire Normal (Ω)

WHT – RED

37 ~ 54

RED – ORN YLW – BRN

BRN – BLU

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

MUZ-SF50

Color of lead wire Normal (Ω)

RED – ORN

37 ~ 54

RED – WHT

RED – BLU

RED – YLW

Defrost heater

MUZ-SF•VEH

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

Normal (Ω)

349 ~ 428

WHT

RED BLK

WHT

RED BLK

LEV

WHT

RED ORN

YLW

BRN

BLU

RED

(+12V)

YLW

BLU

WHT ORN

LEV

OBH629A

11-5. TROUBLESHOOTING FLOW

Are the voltages balanced?

Disconnect the connector between compressor and the power module (IC700).

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”.

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 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.

OBH629A

F Check of compressor start failure

D Check of compressor winding

E Check of compressor operation time

●Disconnect the connector between the compressor and power module, 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.

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

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 (IC700 failure) (Compressor winding short)

Abnormal (Compressor lock out) (Starting defect)

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

Abnormal (Refrigerant circuit defect) (Closed valve)

Normal

0 second 1 second

2 seconds

10 seconds

10 minutes

<<Judgement>>

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 (-) on the inverter P.C. board . Voltage between outdoor terminal block S1-S2

OBH629A

G Check of outdoor thermistors

H Check of R.V. coil

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

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 inverter P.C. board (see below table), and measure the resistance of thermistor.

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. Turn ON the power supply and press EMERGENCY OPERATION switch twice (HEAT mode).

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

OBH629A

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.

OBH629A

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 The left lamp of OPERATION INDICATOR lamp on the indoor unit light up?

Dose 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 voltage 260 - 370 VDC between DB61 (+) and DB61 (–) on the inverter P.C. board? (Refer to 11-6.1.)

Check the electric parts in main circuit.

Yes

Disconnect the connector between compressor and power module. Turn ON power supply and press EMERGENCY OPERATION switch.

Inverter P.C. board (Solder side)

DB61

260 - 370 VDC

OBH629A

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. Conﬁ rm that the indicators on the LCD screen shown in the right ﬁ gure are all displayed.

Then release the buttons.

Yes

K Check of LEV (Expansion valve)

OBH629A

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

OBH629A

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 main 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 main power supply and outdoor terminal block S1 and between the main power supply and outdoor terminal block S2.

Wait for 2 or more minutes after the main 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 main power supply OFF.

Turn the main power supply ON.

Wait for 2 or more minutes after the main 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 OPERATION INDICATOR lamp (left) 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 main 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 main power supply is turned OFF. Perform the procedure after 3 minutes.

Replace the outdoor inverter P.C. board. 1

Turn the main power supply ON.

Does the indoor OPERATION INDICATOR lamp (left) blink continuously 6 minutes after the emergency operation starts?

Yes

Turn the main 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

OBH629A

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.

OBH629A

O Check of defrost heater

Check the following points before checking electric continuity.

1. Does the resistance of ambient temperature thermistor have the characteristics? Refer to 11-6.1.

2. Is the resistance of defrost heater normal? Refer to 11-4.

3. Does the heater protector remain conducted (not open)?

4. Are both ambient temperature thermistor and circuit of defrost heater securely connected to connectors?

Is there 230 VAC between CN722 and on the inverter P.C. board? Refer to 11-6.1.

Not the problem of the inverter P.C. board.

Replace the inverter P.C. board.

Yes

In HEAT mode, for more than 5 minutes, let the ambient temperature thermistor continue to read 5°C or below, and let the defrost thermistor continue to read -1°C or below.

NOTE: In case both thermistors are more than the above temperature, cool them with cold

water etc...

MUZ-SF•VEH

OBH629A

-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-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH MUZ-SF42VE MUZ-SF42VEH MUZ-SF50VE MUZ-SF50VEH

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)

Smoothing capacitor (C63)

MUZ-SF42/50

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)

Heater connector (CN722)

MUZ-SF25/35VEH MUZ-SF42/50VEH

Fuse (F801) T3.15AL250V

Back side of unit

LEV connector

(CN724)

Output to drive outdoor fan motor (CN932)

LED

OBH629A

12-1. MUZ-SF25VE MUZ-SF25VEH MUZ-SF35VE MUZ-SF35VEH MUZ-SF42VE MUZ-SF42VEH

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

OBH629A

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) CN722 (Defrost heater) MUZ-SF25/35/42VEH 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

Screws of the terminal block support and the back panel

Heat sink

Screw of the earth wire

Screw of the Terminal block support

Screw of the inverter P.C. board

Heat sink support

P.C. board support

Terminal block support

Note: As for MUZ-SF25VE(H), the shape of the out-

door heat exchanger is a flat type.

OBH629A

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

Photo 8

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/cm2 (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.

Defrost thermistor

Outdoor heat exchanger temperature thermistor

Propeller nut

Screws of the outdoor fan motor

Propeller

Brazed parts of 4-way valve

Ambient temperature thermistor

OBH629A

12-2. MUZ-SF50VE MUZ-SF50VEH

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 1

Photo 2

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

Screws of the cabinet

OBH629A

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: <Inverter P.C. board> CN721 (R.V. coil)

CN722 (Defrost heater) MUZ-SF50VEH 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. (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, screw of the P.C. board

cover and screws of the terminal 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 the inverter

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

Photo 3

Photo 4

Photo 5

3. Removing R.V. coil

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

CN721 (R.V. coil)

(3) Remove the R.V. coil.

Screw of the heat sink support and the separator

Brazed parts of 4-way valve

Screw of the R.V. coil

Heat sink

Screw of the inverter P.C. board

Screw of the earth wire

Screws of the terminal block support

Screw of the P.C. board cover

Screw of the terminal block support and the back panel

P.C. board support

Heat sink support

OBH629A

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>

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 hold-

er.

(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 6

Photo 7

Photo 8

5. Removing outdoor fan motor

(1)

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

(2) Disconnect the following connectors:

<Inverter P.C. board> CN931 and 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.

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 part of 4-way valve and pipe. (Photo 5)

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

Propeller nut

OBH629A

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

Distributed in Aug. 2013. No. OBH629 REVISED EDITION-A Distributed in Nov. 2012. No. OBH629 Made in Japan

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

Mitsubishi MUZ-SF35VE-E2, MUZ-SF25VE, MUZ-SF25VEH, MUZ-SF35VE, MUZ-SF35VEH Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual