Mitsubishi MUZ-HC25VA-E1, MUZ-HC35VA-E1, MUZ-HC35VA-E2, MUZ-HC35VAB-E1, MUZ-HC35VAB-E2 Service Manual

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Page 1

SPLIT-TYPE AIR CONDITIONERS

OUTDOOR UNIT

Revision B:

• MUZ-HC35VA-E2 and MUZ-HC35VAB-E2 have been added.

Please void OBH467 REVISED EDITION-A.

SERVICE MANUAL

Models

MUZ-HC25VA MUZ-HC35VA MUZ-HC35VA MUZ-HC35VAB MUZ-HC35VAB -

HFC

utilized

R410A

Indoor unit service manual MSZ-HC•VA Series (OBH466) MSZ-CHC•VA Series (OBH522)

No. OBH467

REVISED EDITION-B

NOTE:

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

CONTENTS

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

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

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

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

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

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

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

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

9. ACTUATOR CONTROL ··································· 24

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

11. TROUBLESHOOTING ····································· 25

12. DISASSEMBLY INSTRUCTIONS ···················· 40

PARTS CATALOG (OBB467)

Page 2

Revision A:

•Table “ADDITIONAL REFRIGERANT CHARGE” of “7.

REFRIGERANT SYSTEM DIAGRAM

Revision B:

• MUZ-HC35VA-E2 and MUZ-HC35VAB-E2 have been added.

” has been corrected.

Page 3

TECHNICAL CHANGES

MUZ-HA25VA -E1 → MUZ-HC25VA MUZ-HA35VA -E1 → MUZ-HC35VA MUZ-HA35VA -E1 → MUZ-HC35VAB -

1. Outdoor model has been changed.

MUZ-HC35VA -E1 → MUZ-HC35VA MUZ-HC35VAB -E1 → MUZ-HC35VAB -

1. REFRIGERANT SYSTEM has been changed.

Page 4

PART NAMES AND FUNCTIONS

MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB

Air inlet

Piping

Drain hose

Air outlet

Drain outlet

ACCESSORIES

Drain socket 1

Page 5

Breaker capacity A 10 Running current 1 (Total) A 3.7 4.2 4.8 4.8 5.3 4.8 Power input 1 (Total) W 770 880 980 995 1130 995 Power factor Starting current 1 (Total) A 4.2 4.8 5.3

Electrical data

Coefﬁ cient of performance (C.O.P)

Compressor

Fan motor

Dehumidiﬁ cation /h 1.4 - 2.0 - 2.0 - Air ﬂ ow 1 m3/h 1,812 1,788 1,800 1,776 1,800 1,776 Sound level 1 dB(A) 46 47 47 48 47 48 Fan speed rpm 810 800 800 790 800 790 Fan speed regulator 1 Refrigerant ﬁ lling capacity (R410A) kg 0.73 0.75

Special remarks

Refrigeration oil (Model) NEO22

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

Outdoor model MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB

Function Cooling Heating Cooling Heating Cooling Heating

Power supply Single phase 230 V, 50 Hz

Rated frequency (Min.-Max.)

Capacity

1 (Total) % 90 91 89 90 93 90

Model KNB065FDTH(C)

Output W 500 550 Current Model RA6V21-AB or BB or BD Current 1 A 0.24

Dimensions W × H × D mm 684 × 540 × 255

1 A 3.24 3.74 4.34 4.34 4.84 4.34

Weight kg 25

1 (Total) 3.25 3.64 3.21 3.62 3.01 3.62

2.5

(0.9-3.0)

3.2

(0.9-4.4)

3.15

(1.0-3.7)

3.6

(0.9-4.8)

KNB073FEDH KNB073FGDH

KNB073FGDHC

3.4

(1.0-3.7)

3.6

(0.9-4.8)

Page 6

Speciﬁ cations and rating conditions of main electric parts

Item

Model

MUZ-HC25

MUZ-HC35VA-

MUZ-HC35VAB-

MUZ-HC35VA-

MUZ-HC35VAB-

Current transformer (CT) 20 A

Smoothing capacitor (C61, C62) 500 μF 420 V Diode module

(DB61) 15 A 600 V

(DB65) 10 A 600 V

Fuse

(F61) T20AL250V

(F701, F801) T3.15AL250V

Intelligent power module (IPM) 10 A 600 V

Expansion valve coil (LEV) — DC 12 V

Reactor (L61) 18 mH 7 A

Current-detecting resistor

(R61) 45 mΩ 5 W

(R825) 25 mΩ 5 W

Current-limiting PTC thermistor (PTC64) 33 Ω

Terminal block (TB1,TB2) 3 P Relay

(X61) 5 A 250 V

(X63) 3 A 250 V

(X64) 20 A 250 V

R.V. coil (21S4) SHF-4-10W5

Outdoor fan motor thermal fuse Open 152°C (RA6V21-AB) or Open 126°C (RA6V21-BB or BD) IGBT (TR821) 30 A 600 V

Page 7

NOISE CRITERIA CURVES

MUZ-HC25VA

FUNCTION

COOLING HEATING

APPROXIMATE

THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

SPL(dB(A)) LINE

46 47

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

MUZ-HC35VA

FUNCTION

COOLING

HEATING

APPROXIMATE

THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

SPL(dB(A))

47 48

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

MUZ-HC35VAB

FUNCTION

COOLING

HEATING

APPROXIMATE

THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

SPL(dB(A))

47 48

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

Test conditions Cooling : Dry-bulb temperature 35°C

Heating : Dry-bulb temperature 7°C Wet-bulb temperature 6°C

OUTDOOR UNIT

MICROPHONE

Page 8

OUTLINES AND DIMENSIONS

MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB

381.5

Air in

540

17.5

Handle

Air in

Air out

Drain hole

2 holes 10 × 16

47.5

Bolt pitch for

22.5

264-280

installation

REQUIRED SPACE

100 mm or more

300

255

20.8

144.6

89.6

Basically open 100 mm or more without any obstruction in front and on both sides of the unit.

100 mm or more

Open two sides of left, right, or rear side.

Service panel

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

40°

43°

Unit : mm

100 mm or more

350 mm or more

270

243

105

Bolt pitch for installation

500

684

Service port

145.5

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

Page 9

MUZ-HC25VA MUZ-HC35VA-

WIRING DIAGRAM

MUZ-HC35VAB-

Page 10

MUZ-HC35VA-

MUZ-HC35VAB-

Page 11

REFRIGERANT SYSTEM DIAGRAM

MUZ-HC25VA MUZ-HC35VA-

MUZ-HC35VAB-

Unit : mm

Refrigerant pipe ø9.52 (with heat insulator)

Flared connection

Refrigerant pipe ø6.35 (with heat insulator)

Muffler

Stop valve (with service port)

Stop valve (with strainer)

4-way valve

Discharge temperature thermistor RT62

Capillary tube

3.0 × ø1.4 × 450 (HC25)

3.0 × ø1.4 × 235 (HC35)

Check

Capillary tube

valve

ø ø

Muffler

Compressor

Defrost thermistor RT61

3.0 × ø1.4 × 800 (HC25)

3.0 × ø1.4 × 600 (HC35)

Refrigerant flow in cooling Refrigerant flow in heating

Outdoor heat exchanger

Strainer

R.V. coil heating ON cooling OFF

MUZ-HC35VA-

Refrigerant pipe ø9.52 (with heat insulator)

Refrigerant pipe ø6.35 (with heat insulator)

MUZ-HC35VAB-

Flared connection

Muffler

Stop valve (with service port)

Capillary tube

3.0 × ø2.0 × 260

Stop valve (with strainer)

4-way valve

Discharge temperature thermistor RT62

LEV

Muffler

Compressor

Refrigerant flow in cooling Refrigerant flow in heating

Outdoor heat exchanger

Defrost thermistor RT61

Strainer #100

R.V. coil heating ON cooling OFF

Page 12

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB

Refrigerant piping: m

Max. Length

Max. Height difference

10 5 9.52 6.35

Indoor unit

Max. Height

difference

Max. Length A

Outdoor unit

Piping size O.D: mm

Gas Liquid

ADDITIONAL REFRIGERANT CHARGE (R410A : g)

Model

Outdoor unit

precharged

5 m 6 m 7 m 8 m 9 m 10 m

MUZ-HC25VA MUZ-HC35VA

1,150

0 0 0 90 120 150

MUZ-HC35VAB

NOTE : Refrigerant piping exceeding 7 m requires additional refrigerant charge according to the calculation.

Refrigerant piping length (one way)

Calculation: X g = 30 g/m (Refrigerant piping length (m) - 5)

Page 13

PERFORMANCE CURVES8

MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB

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 (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 (6) Outdoor intake air wet-bulb temperature : °C WB (7) Total input : W Indoor air wet/dry-bulb temperature difference on the left side of the following chart shows the difference between the indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service.

How to measure the indoor air wet-bulb/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.

}

Cooling

Heating

INDOOR UNIT

Wet and dry-bulb thermometers

OUTDOOR UNIT

Wet and dry-bulb thermometers

Page 14

8-1. CAPACITY AND INPUT CURVES

7.9

9.8

7.3

9.0

6.7

8.3

6.1

7.5

5.5

6.8

5.0

6.1

difference (degree)

4.4

5.4

Indoor air Wet-bulb temperature

at Rated frequency

MUZ-HC25VA

8.3

6.7

7.5

6.1

6.8

5.5

6.1

5.0

5.4

4.4

difference (degree)

Indoor air Wet-bulb temperature

3.9

4.8

10.8

9.9

9.1

8.2

7.4

6.7

5.9

at Rated frequency

MUZ-HC35VAB

MUZ-HC35VA

9.1

8.2

7.4

6.7

5.9

5.2

1.5

1.4

1.3

1.2

1.1

1.0

0.9

Capacity correction factor

Indoor intake air Wet-bulb temperature (°C)

18 20 25 30 35 40 43

Outdoor intake air Dry-bulb temperature (°C)

1.3

1.2

1.1

Cooling capacity

Total input (cooling)

1.0

0.9

0.8

Input correction factor

Indoor intake air Wet-bulb temperature (°C)

18 20 25 30 35 40 43

Outdoor intake air Dry-bulb temperature (°C)

22 20 18

at Rated frequency

MUZ-HC25VA

22.4

20.5

20.7

18.9

19.0

17.4

17.2

15.8

15.5

14.2

13.8

12.6

12.1

11.0

difference (degree)

Indoor air Wet-bulb temperature

10.3

9.5

at Rated frequency

MUZ-HC25VA

at Rated frequency

MUZ-HC35VA

at Rated frequency

MUZ-HC35VAB

22.4

20.7

19.0

17.2

15.5

13.8

12.1

10.3

at Rated frequency

MUZ-HC35VAB

(°C)

ure

mperat

Indoor intake air Dry-bulb temperature (°C)

Indoor intake air Dry-bulb te

Outdoor intake air Wet-bulb temperature (°C)

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

Page 15

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

MUZ-HC25VA

Correction of Cooling capacity

1.5

Correction of Cooling total input

1.5

Correction of Heating capacity

2.0

Correction of Heating total input

2.0

1.0

0.5

Capacity correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

MUZ-HC35VA

Correction of Cooling capacity

1.5

1.0

0.5

Capacity correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

1.0

0.5

Input correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

Correction of Cooling total input

1.5

1.0

0.5

Input correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

1.5

1.0

0.5

Capacity correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

Correction of Heating capacity

2.0

1.5

1.0

0.5

Capacity correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

1.5

1.0

0.5

Input correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

Correction of Heating total input

2.0

1.5

1.0

0.5

Input correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

MUZ-HC35VAB

Correction of Cooling capacity

1.5

1.0

0.5

Capacity correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

Correction of Cooling total input

1.5

1.0

0.5

Input correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

Correction of Heating capacity

2.0

1.5

1.0

0.5

Capacity correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

Correction of Heating total input

2.0

1.5

1.0

0.5

Input correction factors

0.0 0 50 100 150(Hz)

The operational frequency of compressor

8-3. TEST RUN OPERATION (How to operate fixed-frequency operation)

1. Press EMERGENCY OPERATION switch to 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.

5. 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.

Page 16

8-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

COOL operation

Both indoor and outdoor unit are under the same tempera-

ture/humidity condition.

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

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

20 50 25 60 30 70

Outdoor low pressure

MUZ-HC25VA

1.4

1.2

[Gauge]

kgf/cm

8 6 4

1.0

MPa [Gauge]

0.8

0.6

0.4

0.2 18

Ambient temperature (°C) Ambient humidity (%)

3215 2050256030

70 (%)

NOTE : The unit of pressure has been changed to MPa on the international system of units (SI unit system). The conversion factor is: 1 (MPa [Gauge]) = 10.2 (kgf/cm2[Gauge])

35(°C)

14 12

[Gauge]

kgf/cm

8 6 4

MUZ-HC35VA

1.4

1.2

1.0

MPa [Gauge]

0.8

0.6

0.4

0.2 18

Ambient temperature (°C) Ambient humidity (%)

3215 2050256030

35(°C)

70 (%)

14 12

[Gauge]

kgf/cm

8 6 4

MUZ-HC35VAB

1.4

1.2

1.0

MPa [Gauge]

0.8

0.6

0.4

0.2 18

Ambient temperature (°C) Ambient humidity (%)

Outdoor unit current

MUZ-HC25VA

(A) (A) (A)

MUZ-HC35VA MUZ-HC35VAB

3215 2050256030

35(°C)

70 (%)

15 205025

60 Ambient temperature (°C) Ambient humidity (%)

3230

35(°C)

70 (%)

15 205025

60 Ambient temperature (°C) Ambient humidity (%)

70 (%)

HEAT operation

Condition:

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

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

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

Outdoor unit current

MUZ-HC25VA MUZ-HC35VA

(A) (A) (A)

3.0

2.5

2.0

1.5

1.0

0.5

0.0 2

5 10 15 20 25 (°C)

Ambient temperature (°C)

Indoor Outdoor

4.0

3.5

3.0

2.5

2.0

1.5

1.0 2

5 10 15 20 25 (°C)

Ambient temperature (°C)

3230

35(°C)

15 205025

Ambient temperature (°C) Ambient humidity (%)

MUZ-HC35VAB

4.0

3.5

3.0

2.5

2.0

1.5

1.0 2

5 10 15 20 25 (°C)

Ambient temperature (°C)

3230

35(°C)

70 (%)

Page 17

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-HC25VA

CAPACITY: 2.5 kW SHF: 0.79 INPUT: 770 W

INDOOR

DB (°C)

INDOOR

WB (°C)

21 18 2.94 1.79 0.61 616 2.81 1.72 0.61 647 2.70 1.65 0.61 678 2.60 1.59 0.61 708 21 20 3.06 1.50 0.49 647 2.94 1.44 0.49 685 2.85 1.40 0.49 701 2.75 1.35 0.49 732 22 18 2.94 1.91 0.65 616 2.81 1.83 0.65 647 2.70 1.76 0.65 678 2.60 1.69 0.65 708 22 20 3.06 1.62 0.53 647 2.94 1.56 0.53 685 2.85 1.51 0.53 701 2.75 1.46 0.53 732 22 22 3.19 1.31 0.41 670 3.08 1.26 0.41 712 3.00 1.23 0.41 732 2.88 1.18 0.41 762 23 18 2.94 2.03 0.69 616 2.81 1.94 0.69 647 2.70 1.86 0.69 678 2.60 1.79 0.69 708 23 20 3.06 1.75 0.57 647 2.94 1.67 0.57 685 2.85 1.62 0.57 701 2.75 1.57 0.57 732 23 22 3.19 1.43 0.45 670 3.08 1.38 0.45 712 3.00 1.35 0.45 732 2.88 1.29 0.45 762 24 18 2.94 2.14 0.73 616 2.81 2.05 0.73 647 2.70 1.97 0.73 678 2.60 1.90 0.73 708 24 20 3.06 1.87 0.61 647 2.94 1.79 0.61 685 2.85 1.74 0.61 701 2.75 1.68 0.61 732 24 22 3.19 1.56 0.49 670 3.08 1.51 0.49 712 3.00 1.47 0.49 732 2.88 1.41 0.49 762 24 24 3.35 1.24 0.37 701 3.23 1.19 0.37 739 3.15 1.17 0.37 762 3.05 1.13 0.37 801 25 18 2.94 2.26 0.77 616 2.81 2.17 0.77 647 2.70 2.08 0.77 678 2.60 2.00 0.77 708 25 20 3.06 1.99 0.65 647 2.94 1.91 0.65 685 2.85 1.85 0.65 701 2.75 1.79 0.65 732 25 22 3.19 1.69 0.53 670 3.08 1.63 0.53 712 3.00 1.59 0.53 732 2.88 1.52 0.53 762 25 24 3.35 1.37 0.41 701 3.23 1.32 0.41 739 3.15 1.29 0.41 762 3.05 1.25 0.41 801 26 18 2.94 2.38 0.81 616 2.81 2.28 0.81 647 2.70 2.19 0.81 678 2.60 2.11 0.81 708 26 20 3.06 2.11 0.69 647 2.94 2.03 0.69 685 2.85 1.97 0.69 701 2.75 1.90 0.69 732 26 22 3.19 1.82 0.57 670 3.08 1.75 0.57 712 3.00 1.71 0.57 732 2.88 1.64 0.57 762 26 24 3.35 1.51 0.45 701 3.23 1.45 0.45 739 3.15 1.42 0.45 762 3.05 1.37 0.45 801 26 26 3.45 1.14 0.33 739 3.35 1.11 0.33 778 3.30 1.09 0.33 801 3.20 1.06 0.33 824 27 18 2.94 2.50 0.85 616 2.81 2.39 0.85 647 2.70 2.30 0.85 678 2.60 2.21 0.85 708 27 20 3.06 2.24 0.73 647 2.94 2.14 0.73 685 2.85 2.08 0.73 701 2.75 2.01 0.73 732 27 22 3.19 1.94 0.61 670 3.08 1.88 0.61 712 3.00 1.83 0.61 732 2.88 1.75 0.61 762 27 24 3.35 1.64 0.49 701 3.23 1.58 0.49 739 3.15 1.54 0.49 762 3.05 1.49 0.49 801 27 26 3.45 1.28 0.37 739 3.35 1.24 0.37 778 3.30 1.22 0.37 801 3.20 1.18 0.37 824 28 18 2.94 2.61 0.89 616 2.81 2.50 0.89 647 2.70 2.40 0.89 678 2.60 2.31 0.89 708 28 20 3.06 2.36 0.77 647 2.94 2.26 0.77 685 2.85 2.19 0.77 701 2.75 2.12 0.77 732 28 22 3.19 2.07 0.65 670 3.08 2.00 0.65 712 3.00 1.95 0.65 732 2.88 1.87 0.65 762 28 24 3.35 1.78 0.53 701 3.23 1.71 0.53 739 3.15 1.67 0.53 762 3.05 1.62 0.53 801 28 26 3.45 1.41 0.41 739 3.35 1.37 0.41 778 3.30 1.35 0.41 801 3.20 1.31 0.41 824 29 18 2.94 2.73 0.93 616 2.81 2.62 0.93 647 2.70 2.51 0.93 678 2.60 2.42 0.93 708 29 20 3.06 2.48 0.81 647 2.94 2.38 0.81 685 2.85 2.31 0.81 701 2.75 2.23 0.81 732 29 22 3.19 2.20 0.69 670 3.08 2.12 0.69 712 3.00 2.07 0.69 732 2.88 1.98 0.69 762 29 24 3.35 1.91 0.57 701 3.23 1.84 0.57 739 3.15 1.80 0.57 762 3.05 1.74 0.57 801 29 26 3.45 1.55 0.45 739 3.35 1.51 0.45 778 3.30 1.49 0.45 801 3.20 1.44 0.45 824 30 18 2.94 2.85 0.97 616 2.81 2.73 0.97 647 2.70 2.62 0.97 678 2.60 2.52 0.97 708 30 20 3.06 2.60 0.85 647 2.94 2.50 0.85 685 2.85 2.42 0.85 701 2.75 2.34 0.85 732 30 22 3.19 2.33 0.73 670 3.08 2.24 0.73 712 3.00 2.19 0.73 732 2.88 2.10 0.73 762 30 24 3.35 2.04 0.61 701 3.23 1.97 0.61 739 3.15 1.92 0.61 762 3.05 1.86 0.61 801 30 26 3.45 1.69 0.49 739 3.35 1.64 0.49 778 3.30 1.62 0.49 801 3.20 1.57 0.49 824 31 18 2.94 2.94 1.00 616 2.81 2.81 1.00 647 2.70 2.70 1.00 678 2.60 2.60 1.00 708 31 20 3.06 2.73 0.89 647 2.94 2.61 0.89 685 2.85 2.54 0.89 701 2.75 2.45 0.89 732 31 22 3.19 2.45 0.77 670 3.08 2.37 0.77 712 3.00 2.31 0.77 732 2.88 2.21 0.77 762 31 24 3.35 2.18 0.65 701 3.23 2.10 0.65 739 3.15 2.05 0.65 762 3.05 1.98 0.65 801 31 26 3.45 1.83 0.53 739 3.35 1.78 0.53 778 3.30 1.75 0.53 801 3.20 1.70 0.53 824 32 18 2.94 2.94 1.00 616 2.81 2.81 1.00 647 2.70 2.70 1.00 678 2.60 2.60 1.00 708 32 20 3.06 2.85 0.93 647 2.94 2.73 0.93 685 2.85 2.65 0.93 701 2.75 2.56 0.93 732 32 22 3.19 2.58 0.81 670 3.08 2.49 0.81 712 3.00 2.43 0.81 732 2.88 2.33 0.81 762 32 24 3.35 2.31 0.69 701 3.23 2.23 0.69 739 3.15 2.17 0.69 762 3.05 2.10 0.69 801 32 26 3.45 1.97 0.57 739 3.35 1.91 0.57 778 3.30 1.88 0.57 801 3.20 1.82 0.57 824

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

21 25 27 30

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

OUTDOOR DB (°C)

Page 18

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-HC25VA

CAPACITY: 2.5 kW SHF: 0.79 INPUT: 770 W

INDOOR

DB (°C)

INDOOR

WB (°C)

21 18 2.45 1.49 0.61 755 2.25 1.37 0.61 801 2.08 1.27 0.61 832 21 20 2.58 1.26 0.49 785 2.40 1.18 0.49 824 2.23 1.09 0.49 870 22 18 2.45 1.59 0.65 755 2.25 1.46 0.65 801 2.08 1.35 0.65 832 22 20 2.58 1.36 0.53 785 2.40 1.27 0.53 824 2.23 1.18 0.53 870 22 22 2.73 1.12 0.41 816 2.55 1.05 0.41 862 2.38 0.97 0.41 893 23 18 2.45 1.69 0.69 755 2.25 1.55 0.69 801 2.08 1.43 0.69 832 23 20 2.58 1.47 0.57 785 2.40 1.37 0.57 824 2.23 1.27 0.57 870 23 22 2.73 1.23 0.45 816 2.55 1.15 0.45 862 2.38 1.07 0.45 893 24 18 2.45 1.79 0.73 755 2.25 1.64 0.73 801 2.08 1.51 0.73 832 24 20 2.58 1.57 0.61 785 2.40 1.46 0.61 824 2.23 1.36 0.61 870 24 22 2.73 1.34 0.49 816 2.55 1.25 0.49 862 2.38 1.16 0.49 893 24 24 2.88 1.06 0.37 847 2.70 1.00 0.37 886 2.55 0.94 0.37 924 25 18 2.45 1.89 0.77 755 2.25 1.73 0.77 801 2.08 1.60 0.77 832 25 20 2.58 1.67 0.65 785 2.40 1.56 0.65 824 2.23 1.45 0.65 870 25 22 2.73 1.44 0.53 816 2.55 1.35 0.53 862 2.38 1.26 0.53 893 25 24 2.88 1.18 0.41 847 2.70 1.11 0.41 886 2.55 1.05 0.41 924 26 18 2.45 1.98 0.81 755 2.25 1.82 0.81 801 2.08 1.68 0.81 832 26 20 2.58 1.78 0.69 785 2.40 1.66 0.69 824 2.23 1.54 0.69 870 26 22 2.73 1.55 0.57 816 2.55 1.45 0.57 862 2.38 1.35 0.57 893 26 24 2.88 1.29 0.45 847 2.70 1.22 0.45 886 2.55 1.15 0.45 924 26 26 3.03 1.00 0.33 878 2.85 0.94 0.33 916 2.68 0.88 0.33 955 27 18 2.45 2.08 0.85 755 2.25 1.91 0.85 801 2.08 1.76 0.85 832 27 20 2.58 1.88 0.73 785 2.40 1.75 0.73 824 2.23 1.62 0.73 870 27 22 2.73 1.66 0.61 816 2.55 1.56 0.61 862 2.38 1.45 0.61 893 27 24 2.88 1.41 0.49 847 2.70 1.32 0.49 886 2.55 1.25 0.49 924 27 26 3.03 1.12 0.37 878 2.85 1.05 0.37 916 2.68 0.99 0.37 955 28 18 2.45 2.18 0.89 755 2.25 2.00 0.89 801 2.08 1.85 0.89 832 28 20 2.58 1.98 0.77 785 2.40 1.85 0.77 824 2.23 1.71 0.77 870 28 22 2.73 1.77 0.65 816 2.55 1.66 0.65 862 2.38 1.54 0.65 893 28 24 2.88 1.52 0.53 847 2.70 1.43 0.53 886 2.55 1.35 0.53 924 28 26 3.03 1.24 0.41 878 2.85 1.17 0.41 916 2.68 1.10 0.41 955 29 18 2.45 2.28 0.93 755 2.25 2.09 0.93 801 2.08 1.93 0.93 832 29 20 2.58 2.09 0.81 785 2.40 1.94 0.81 824 2.23 1.80 0.81 870 29 22 2.73 1.88 0.69 816 2.55 1.76 0.69 862 2.38 1.64 0.69 893 29 24 2.88 1.64 0.57 847 2.70 1.54 0.57 886 2.55 1.45 0.57 924 29 26 3.03 1.36 0.45 878 2.85 1.28 0.45 916 2.68 1.20 0.45 955 30 18 2.45 2.38 0.97 755 2.25 2.18 0.97 801 2.08 2.01 0.97 832 30 20 2.58 2.19 0.85 785 2.40 2.04 0.85 824 2.23 1.89 0.85 870 30 22 2.73 1.99 0.73 816 2.55 1.86 0.73 862 2.38 1.73 0.73 893 30 24 2.88 1.75 0.61 847 2.70 1.65 0.61 886 2.55 1.56 0.61 924 30 26 3.03 1.48 0.49 878 2.85 1.40 0.49 916 2.68 1.31 0.49 955 31 18 2.45 2.45 1.00 755 2.25 2.25 1.00 801 2.08 2.08 1.00 832 31 20 2.58 2.29 0.89 785 2.40 2.14 0.89 824 2.23 1.98 0.89 870 31 22 2.73 2.10 0.77 816 2.55 1.96 0.77 862 2.38 1.83 0.77 893 31 24 2.88 1.87 0.65 847 2.70 1.76 0.65 886 2.55 1.66 0.65 924 31 26 3.03 1.60 0.53 878 2.85 1.51 0.53 916 2.68 1.42 0.53 955 32 18 2.45 2.45 1.00 755 2.25 2.25 1.00 801 2.08 2.08 1.00 832 32 20 2.58 2.39 0.93 785 2.40 2.23 0.93 824 2.23 2.07 0.93 870 32 22 2.73 2.21 0.81 816 2.55 2.07 0.81 862 2.38 1.92 0.81 893 32 24 2.88 1.98 0.69 847 2.70 1.86 0.69 886 2.55 1.76 0.69 924 32 26 3.03 1.72 0.57 878 2.85 1.62 0.57 916 2.68 1.52 0.57 955

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

35 40 46

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

OUTDOOR DB (°C)

Page 19

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-HC35VA

CAPACITY: 3.15 kW SHF: 0.76 INPUT: 980 W

INDOOR

DB (°C)

INDOOR

WB (°C)

21 18 3.70 2.15 0.58 784 3.54 2.06 0.58 823 3.40 1.97 0.58 862 3.28 1.90 0.58 902 21 20 3.86 1.78 0.46 823 3.70 1.70 0.46 872 3.59 1.65 0.46 892 3.47 1.59 0.46 931 22 18 3.70 2.29 0.62 784 3.54 2.20 0.62 823 3.40 2.11 0.62 862 3.28 2.03 0.62 902 22 20 3.86 1.93 0.50 823 3.70 1.85 0.50 872 3.59 1.80 0.50 892 3.47 1.73 0.50 931 22 22 4.02 1.53 0.38 853 3.87 1.47 0.38 907 3.78 1.44 0.38 931 3.62 1.38 0.38 970 23 18 3.70 2.44 0.66 784 3.54 2.34 0.66 823 3.40 2.25 0.66 862 3.28 2.16 0.66 902 23 20 3.86 2.08 0.54 823 3.70 2.00 0.54 872 3.59 1.94 0.54 892 3.47 1.87 0.54 931 23 22 4.02 1.69 0.42 853 3.87 1.63 0.42 907 3.78 1.59 0.42 931 3.62 1.52 0.42 970 24 18 3.70 2.59 0.70 784 3.54 2.48 0.70 823 3.40 2.38 0.70 862 3.28 2.29 0.70 902 24 20 3.86 2.24 0.58 823 3.70 2.15 0.58 872 3.59 2.08 0.58 892 3.47 2.01 0.58 931 24 22 4.02 1.85 0.46 853 3.87 1.78 0.46 907 3.78 1.74 0.46 931 3.62 1.67 0.46 970 24 24 4.22 1.44 0.34 892 4.06 1.38 0.34 941 3.97 1.35 0.34 970 3.84 1.31 0.34 1019 25 18 3.70 2.74 0.74 784 3.54 2.62 0.74 823 3.40 2.52 0.74 862 3.28 2.42 0.74 902 25 20 3.86 2.39 0.62 823 3.70 2.29 0.62 872 3.59 2.23 0.62 892 3.47 2.15 0.62 931 25 22 4.02 2.01 0.50 853 3.87 1.94 0.50 907 3.78 1.89 0.50 931 3.62 1.81 0.50 970 25 24 4.22 1.60 0.38 892 4.06 1.54 0.38 941 3.97 1.51 0.38 970 3.84 1.46 0.38 1019 26 18 3.70 2.89 0.78 784 3.54 2.76 0.78 823 3.40 2.65 0.78 862 3.28 2.56 0.78 902 26 20 3.86 2.55 0.66 823 3.70 2.44 0.66 872 3.59 2.37 0.66 892 3.47 2.29 0.66 931 26 22 4.02 2.17 0.54 853 3.87 2.09 0.54 907 3.78 2.04 0.54 931 3.62 1.96 0.54 970 26 24 4.22 1.77 0.42 892 4.06 1.71 0.42 941 3.97 1.67 0.42 970 3.84 1.61 0.42 1019 26 26 4.35 1.30 0.30 941 4.22 1.27 0.30 990 4.16 1.25 0.30 1019 4.03 1.21 0.30 1049 27 18 3.70 3.04 0.82 784 3.54 2.91 0.82 823 3.40 2.79 0.82 862 3.28 2.69 0.82 902 27 20 3.86 2.70 0.70 823 3.70 2.59 0.70 872 3.59 2.51 0.70 892 3.47 2.43 0.70 931 27 22 4.02 2.33 0.58 853 3.87 2.25 0.58 907 3.78 2.19 0.58 931 3.62 2.10 0.58 970 27 24 4.22 1.94 0.46 892 4.06 1.87 0.46 941 3.97 1.83 0.46 970 3.84 1.77 0.46 1019 27 26 4.35 1.48 0.34 941 4.22 1.44 0.34 990 4.16 1.41 0.34 1019 4.03 1.37 0.34 1049 28 18 3.70 3.18 0.86 784 3.54 3.05 0.86 823 3.40 2.93 0.86 862 3.28 2.82 0.86 902 28 20 3.86 2.86 0.74 823 3.70 2.74 0.74 872 3.59 2.66 0.74 892 3.47 2.56 0.74 931 28 22 4.02 2.49 0.62 853 3.87 2.40 0.62 907 3.78 2.34 0.62 931 3.62 2.25 0.62 970 28 24 4.22 2.11 0.50 892 4.06 2.03 0.50 941 3.97 1.98 0.50 970 3.84 1.92 0.50 1019 28 26 4.35 1.65 0.38 941 4.22 1.60 0.38 990 4.16 1.58 0.38 1019 4.03 1.53 0.38 1049 29 18 3.70 3.33 0.90 784 3.54 3.19 0.90 823 3.40 3.06 0.90 862 3.28 2.95 0.90 902 29 20 3.86 3.01 0.78 823 3.70 2.89 0.78 872 3.59 2.80 0.78 892 3.47 2.70 0.78 931 29 22 4.02 2.65 0.66 853 3.87 2.56 0.66 907 3.78 2.49 0.66 931 3.62 2.39 0.66 970 29 24 4.22 2.28 0.54 892 4.06 2.19 0.54 941 3.97 2.14 0.54 970 3.84 2.08 0.54 1019 29 26 4.35 1.83 0.42 941 4.22 1.77 0.42 990 4.16 1.75 0.42 1019 4.03 1.69 0.42 1049 30 18 3.70 3.48 0.94 784 3.54 3.33 0.94 823 3.40 3.20 0.94 862 3.28 3.08 0.94 902 30 20 3.86 3.16 0.82 823 3.70 3.04 0.82 872 3.59 2.94 0.82 892 3.47 2.84 0.82 931 30 22 4.02 2.81 0.70 853 3.87 2.71 0.70 907 3.78 2.65 0.70 931 3.62 2.54 0.70 970 30 24 4.22 2.45 0.58 892 4.06 2.36 0.58 941 3.97 2.30 0.58 970 3.84 2.23 0.58 1019 30 26 4.35 2.00 0.46 941 4.22 1.94 0.46 990 4.16 1.91 0.46 1019 4.03 1.85 0.46 1049 31 18 3.70 3.63 0.98 784 3.54 3.47 0.98 823 3.40 3.33 0.98 862 3.28 3.21 0.98 902 31 20 3.86 3.32 0.86 823 3.70 3.18 0.86 872 3.59 3.09 0.86 892 3.47 2.98 0.86 931 31 22 4.02 2.97 0.74 853 3.87 2.87 0.74 907 3.78 2.80 0.74 931 3.62 2.68 0.74 970 31 24 4.22 2.62 0.62 892 4.06 2.52 0.62 941 3.97 2.46 0.62 970 3.84 2.38 0.62 1019 31 26 4.35 2.17 0.50 941 4.22 2.11 0.50 990 4.16 2.08 0.50 1019 4.03 2.02 0.50 1049 32 18 3.70 3.70 1.00 784 3.54 3.54 1.00 823 3.40 3.40 1.00 862 3.28 3.28 1.00 902 32 20 3.86 3.47 0.90 823 3.70 3.33 0.90 872 3.59 3.23 0.90 892 3.47 3.12 0.90 931 32 22 4.02 3.13 0.78 853 3.87 3.02 0.78 907 3.78 2.95 0.78 931 3.62 2.83 0.78 970 32 24 4.22 2.79 0.66 892 4.06 2.68 0.66 941 3.97 2.62 0.66 970 3.84 2.54 0.66 1019 32 26 4.35 2.35 0.54 941 4.22 2.28 0.54 990 4.16 2.25 0.54 1019 4.03 2.18 0.54 1049

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

21 25 27 30

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

OUTDOOR DB (°C)

Page 20

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-HC35VA

CAPACITY: 3.15 kW SHF: 0.76 INPUT: 980 W

INDOOR

DB (°C)

INDOOR

WB (°C)

21 18 3.09 1.79 0.58 960 2.84 1.64 0.58 1019 2.61 1.52 0.58 1058 21 20 3.24 1.49 0.46 1000 3.02 1.39 0.46 1049 2.80 1.29 0.46 1107 22 18 3.09 1.91 0.62 960 2.84 1.76 0.62 1019 2.61 1.62 0.62 1058 22 20 3.24 1.62 0.50 1000 3.02 1.51 0.50 1049 2.80 1.40 0.50 1107 22 22 3.43 1.30 0.38 1039 3.21 1.22 0.38 1098 2.99 1.14 0.38 1137 23 18 3.09 2.04 0.66 960 2.84 1.87 0.66 1019 2.61 1.73 0.66 1058 23 20 3.24 1.75 0.54 1000 3.02 1.63 0.54 1049 2.80 1.51 0.54 1107 23 22 3.43 1.44 0.42 1039 3.21 1.35 0.42 1098 2.99 1.26 0.42 1137 24 18 3.09 2.16 0.70 960 2.84 1.98 0.70 1019 2.61 1.83 0.70 1058 24 20 3.24 1.88 0.58 1000 3.02 1.75 0.58 1049 2.80 1.63 0.58 1107 24 22 3.43 1.58 0.46 1039 3.21 1.48 0.46 1098 2.99 1.38 0.46 1137 24 24 3.62 1.23 0.34 1078 3.40 1.16 0.34 1127 3.21 1.09 0.34 1176 25 18 3.09 2.28 0.74 960 2.84 2.10 0.74 1019 2.61 1.93 0.74 1058 25 20 3.24 2.01 0.62 1000 3.02 1.87 0.62 1049 2.80 1.74 0.62 1107 25 22 3.43 1.72 0.50 1039 3.21 1.61 0.50 1098 2.99 1.50 0.50 1137 25 24 3.62 1.38 0.38 1078 3.40 1.29 0.38 1127 3.21 1.22 0.38 1176 26 18 3.09 2.41 0.78 960 2.84 2.21 0.78 1019 2.61 2.04 0.78 1058 26 20 3.24 2.14 0.66 1000 3.02 2.00 0.66 1049 2.80 1.85 0.66 1107 26 22 3.43 1.85 0.54 1039 3.21 1.74 0.54 1098 2.99 1.62 0.54 1137 26 24 3.62 1.52 0.42 1078 3.40 1.43 0.42 1127 3.21 1.35 0.42 1176 26 26 3.81 1.14 0.30 1117 3.59 1.08 0.30 1166 3.37 1.01 0.30 1215 27 18 3.09 2.53 0.82 960 2.84 2.32 0.82 1019 2.61 2.14 0.82 1058 27 20 3.24 2.27 0.70 1000 3.02 2.12 0.70 1049 2.80 1.96 0.70 1107 27 22 3.43 1.99 0.58 1039 3.21 1.86 0.58 1098 2.99 1.74 0.58 1137 27 24 3.62 1.67 0.46 1078 3.40 1.56 0.46 1127 3.21 1.48 0.46 1176 27 26 3.81 1.30 0.34 1117 3.59 1.22 0.34 1166 3.37 1.15 0.34 1215 28 18 3.09 2.65 0.86 960 2.84 2.44 0.86 1019 2.61 2.25 0.86 1058 28 20 3.24 2.40 0.74 1000 3.02 2.24 0.74 1049 2.80 2.07 0.74 1107 28 22 3.43 2.13 0.62 1039 3.21 1.99 0.62 1098 2.99 1.86 0.62 1137 28 24 3.62 1.81 0.50 1078 3.40 1.70 0.50 1127 3.21 1.61 0.50 1176 28 26 3.81 1.45 0.38 1117 3.59 1.36 0.38 1166 3.37 1.28 0.38 1215 29 18 3.09 2.78 0.90 960 2.84 2.55 0.90 1019 2.61 2.35 0.90 1058 29 20 3.24 2.53 0.78 1000 3.02 2.36 0.78 1049 2.80 2.19 0.78 1107 29 22 3.43 2.27 0.66 1039 3.21 2.12 0.66 1098 2.99 1.98 0.66 1137 29 24 3.62 1.96 0.54 1078 3.40 1.84 0.54 1127 3.21 1.74 0.54 1176 29 26 3.81 1.60 0.42 1117 3.59 1.51 0.42 1166 3.37 1.42 0.42 1215 30 18 3.09 2.90 0.94 960 2.84 2.66 0.94 1019 2.61 2.46 0.94 1058 30 20 3.24 2.66 0.82 1000 3.02 2.48 0.82 1049 2.80 2.30 0.82 1107 30 22 3.43 2.40 0.70 1039 3.21 2.25 0.70 1098 2.99 2.09 0.70 1137 30 24 3.62 2.10 0.58 1078 3.40 1.97 0.58 1127 3.21 1.86 0.58 1176 30 26 3.81 1.75 0.46 1117 3.59 1.65 0.46 1166 3.37 1.55 0.46 1215 31 18 3.09 3.03 0.98 960 2.84 2.78 0.98 1019 2.61 2.56 0.98 1058 31 20 3.24 2.79 0.86 1000 3.02 2.60 0.86 1049 2.80 2.41 0.86 1107 31 22 3.43 2.54 0.74 1039 3.21 2.38 0.74 1098 2.99 2.21 0.74 1137 31 24 3.62 2.25 0.62 1078 3.40 2.11 0.62 1127 3.21 1.99 0.62 1176 31 26 3.81 1.91 0.50 1117 3.59 1.80 0.50 1166 3.37 1.69 0.50 1215 32 18 3.09 3.09 1.00 960 2.84 2.84 1.00 1019 2.61 2.61 1.00 1058 32 20 3.24 2.92 0.90 1000 3.02 2.72 0.90 1049 2.80 2.52 0.90 1107 32 22 3.43 2.68 0.78 1039 3.21 2.51 0.78 1098 2.99 2.33 0.78 1137 32 24 3.62 2.39 0.66 1078 3.40 2.25 0.66 1127 3.21 2.12 0.66 1176 32 26 3.81 2.06 0.54 1117 3.59 1.94 0.54 1166 3.37 1.82 0.54 1215

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

35 40 46

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

OUTDOOR DB (°C)

Page 21

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-HC35VAB

CAPACITY: 3.4 kW SHF: 0.76 INPUT: 1130 W

INDOOR

DB (°C)

INDOOR

WB (°C)

21 18 4.00 2.32 0.58 904 3.83 2.22 0.58 949 3.67 2.13 0.58 994 3.54 2.05 0.58 1040 21 20 4.17 1.92 0.46 949 4.00 1.84 0.46 1006 3.88 1.78 0.46 1028 3.74 1.72 0.46 1074 22 18 4.00 2.48 0.62 904 3.83 2.37 0.62 949 3.67 2.28 0.62 994 3.54 2.19 0.62 1040 22 20 4.17 2.08 0.50 949 4.00 2.00 0.50 1006 3.88 1.94 0.50 1028 3.74 1.87 0.50 1074 22 22 4.34 1.65 0.38 983 4.18 1.59 0.38 1045 4.08 1.55 0.38 1074 3.91 1.49 0.38 1119 23 18 4.00 2.64 0.66 904 3.83 2.52 0.66 949 3.67 2.42 0.66 994 3.54 2.33 0.66 1040 23 20 4.17 2.25 0.54 949 4.00 2.16 0.54 1006 3.88 2.09 0.54 1028 3.74 2.02 0.54 1074 23 22 4.34 1.82 0.42 983 4.18 1.76 0.42 1045 4.08 1.71 0.42 1074 3.91 1.64 0.42 1119 24 18 4.00 2.80 0.70 904 3.83 2.68 0.70 949 3.67 2.57 0.70 994 3.54 2.48 0.70 1040 24 20 4.17 2.42 0.58 949 4.00 2.32 0.58 1006 3.88 2.25 0.58 1028 3.74 2.17 0.58 1074 24 22 4.34 1.99 0.46 983 4.18 1.92 0.46 1045 4.08 1.88 0.46 1074 3.91 1.80 0.46 1119 24 24 4.56 1.55 0.34 1028 4.39 1.49 0.34 1085 4.28 1.46 0.34 1119 4.15 1.41 0.34 1175 25 18 4.00 2.96 0.74 904 3.83 2.83 0.74 949 3.67 2.72 0.74 994 3.54 2.62 0.74 1040 25 20 4.17 2.58 0.62 949 4.00 2.48 0.62 1006 3.88 2.40 0.62 1028 3.74 2.32 0.62 1074 25 22 4.34 2.17 0.50 983 4.18 2.09 0.50 1045 4.08 2.04 0.50 1074 3.91 1.96 0.50 1119 25 24 4.56 1.73 0.38 1028 4.39 1.67 0.38 1085 4.28 1.63 0.38 1119 4.15 1.58 0.38 1175 26 18 4.00 3.12 0.78 904 3.83 2.98 0.78 949 3.67 2.86 0.78 994 3.54 2.76 0.78 1040 26 20 4.17 2.75 0.66 949 4.00 2.64 0.66 1006 3.88 2.56 0.66 1028 3.74 2.47 0.66 1074 26 22 4.34 2.34 0.54 983 4.18 2.26 0.54 1045 4.08 2.20 0.54 1074 3.91 2.11 0.54 1119 26 24 4.56 1.91 0.42 1028 4.39 1.84 0.42 1085 4.28 1.80 0.42 1119 4.15 1.74 0.42 1175 26 26 4.69 1.41 0.30 1085 4.56 1.37 0.30 1141 4.49 1.35 0.30 1175 4.35 1.31 0.30 1209 27 18 4.00 3.28 0.82 904 3.83 3.14 0.82 949 3.67 3.01 0.82 994 3.54 2.90 0.82 1040 27 20 4.17 2.92 0.70 949 4.00 2.80 0.70 1006 3.88 2.71 0.70 1028 3.74 2.62 0.70 1074 27 22 4.34 2.51 0.58 983 4.18 2.43 0.58 1045 4.08 2.37 0.58 1074 3.91 2.27 0.58 1119 27 24 4.56 2.10 0.46 1028 4.39 2.02 0.46 1085 4.28 1.97 0.46 1119 4.15 1.91 0.46 1175 27 26 4.69 1.60 0.34 1085 4.56 1.55 0.34 1141 4.49 1.53 0.34 1175 4.35 1.48 0.34 1209 28 18 4.00 3.44 0.86 904 3.83 3.29 0.86 949 3.67 3.16 0.86 994 3.54 3.04 0.86 1040 28 20 4.17 3.08 0.74 949 4.00 2.96 0.74 1006 3.88 2.87 0.74 1028 3.74 2.77 0.74 1074 28 22 4.34 2.69 0.62 983 4.18 2.59 0.62 1045 4.08 2.53 0.62 1074 3.91 2.42 0.62 1119 28 24 4.56 2.28 0.50 1028 4.39 2.19 0.50 1085 4.28 2.14 0.50 1119 4.15 2.07 0.50 1175 28 26 4.69 1.78 0.38 1085 4.56 1.73 0.38 1141 4.49 1.71 0.38 1175 4.35 1.65 0.38 1209 29 18 4.00 3.60 0.90 904 3.83 3.44 0.90 949 3.67 3.30 0.90 994 3.54 3.18 0.90 1040 29 20 4.17 3.25 0.78 949 4.00 3.12 0.78 1006 3.88 3.02 0.78 1028 3.74 2.92 0.78 1074 29 22 4.34 2.86 0.66 983 4.18 2.76 0.66 1045 4.08 2.69 0.66 1074 3.91 2.58 0.66 1119 29 24 4.56 2.46 0.54 1028 4.39 2.37 0.54 1085 4.28 2.31 0.54 1119 4.15 2.24 0.54 1175 29 26 4.69 1.97 0.42 1085 4.56 1.91 0.42 1141 4.49 1.88 0.42 1175 4.35 1.83 0.42 1209 30 18 4.00 3.76 0.94 904 3.83 3.60 0.94 949 3.67 3.45 0.94 994 3.54 3.32 0.94 1040 30 20 4.17 3.42 0.82 949 4.00 3.28 0.82 1006 3.88 3.18 0.82 1028 3.74 3.07 0.82 1074 30 22 4.34 3.03 0.70 983 4.18 2.93 0.70 1045 4.08 2.86 0.70 1074 3.91 2.74 0.70 1119 30 24 4.56 2.64 0.58 1028 4.39 2.54 0.58 1085 4.28 2.48 0.58 1119 4.15 2.41 0.58 1175 30 26 4.69 2.16 0.46 1085 4.56 2.10 0.46 1141 4.49 2.06 0.46 1175 4.35 2.00 0.46 1209 31 18 4.00 3.92 0.98 904 3.83 3.75 0.98 949 3.67 3.60 0.98 994 3.54 3.47 0.98 1040 31 20 4.17 3.58 0.86 949 4.00 3.44 0.86 1006 3.88 3.33 0.86 1028 3.74 3.22 0.86 1074 31 22 4.34 3.21 0.74 983 4.18 3.09 0.74 1045 4.08 3.02 0.74 1074 3.91 2.89 0.74 1119 31 24 4.56 2.82 0.62 1028 4.39 2.72 0.62 1085 4.28 2.66 0.62 1119 4.15 2.57 0.62 1175 31 26 4.69 2.35 0.50 1085 4.56 2.28 0.50 1141 4.49 2.24 0.50 1175 4.35 2.18 0.50 1209 32 18 4.00 4.00 1.00 904 3.83 3.83 1.00 949 3.67 3.67 1.00 994 3.54 3.54 1.00 1040 32 20 4.17 3.75 0.90 949 4.00 3.60 0.90 1006 3.88 3.49 0.90 1028 3.74 3.37 0.90 1074 32 22 4.34 3.38 0.78 983 4.18 3.26 0.78 1045 4.08 3.18 0.78 1074 3.91 3.05 0.78 1119 32 24 4.56 3.01 0.66 1028 4.39 2.89 0.66 1085 4.28 2.83 0.66 1119 4.15 2.74 0.66 1175 32 26 4.69 2.53 0.54 1085 4.56 2.46 0.54 1141 4.49 2.42 0.54 1175 4.35 2.35 0.54 1209

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

21 25 27 30

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

OUTDOOR DB (°C)

Page 22

PERFORMANCE DATA COOL operation at Rated frequency

MUZ-HC35VAB

CAPACITY: 3.4 kW SHF: 0.76 INPUT: 1130 W

INDOOR

DB (°C)

INDOOR

WB (°C)

21 18 3.33 1.93 0.58 1107 3.06 1.77 0.58 1175 2.82 1.64 0.58 1220 21 20 3.50 1.61 0.46 1153 3.26 1.50 0.46 1209 3.03 1.39 0.46 1277 22 18 3.33 2.07 0.62 1107 3.06 1.90 0.62 1175 2.82 1.75 0.62 1220 22 20 3.50 1.75 0.50 1153 3.26 1.63 0.50 1209 3.03 1.51 0.50 1277 22 22 3.71 1.41 0.38 1198 3.47 1.32 0.38 1266 3.23 1.23 0.38 1311 23 18 3.33 2.20 0.66 1107 3.06 2.02 0.66 1175 2.82 1.86 0.66 1220 23 20 3.50 1.89 0.54 1153 3.26 1.76 0.54 1209 3.03 1.63 0.54 1277 23 22 3.71 1.56 0.42 1198 3.47 1.46 0.42 1266 3.23 1.36 0.42 1311 24 18 3.33 2.33 0.70 1107 3.06 2.14 0.70 1175 2.82 1.98 0.70 1220 24 20 3.50 2.03 0.58 1153 3.26 1.89 0.58 1209 3.03 1.76 0.58 1277 24 22 3.71 1.70 0.46 1198 3.47 1.60 0.46 1266 3.23 1.49 0.46 1311 24 24 3.91 1.33 0.34 1243 3.67 1.25 0.34 1300 3.47 1.18 0.34 1356 25 18 3.33 2.47 0.74 1107 3.06 2.26 0.74 1175 2.82 2.09 0.74 1220 25 20 3.50 2.17 0.62 1153 3.26 2.02 0.62 1209 3.03 1.88 0.62 1277 25 22 3.71 1.85 0.50 1198 3.47 1.73 0.50 1266 3.23 1.62 0.50 1311 25 24 3.91 1.49 0.38 1243 3.67 1.40 0.38 1300 3.47 1.32 0.38 1356 26 18 3.33 2.60 0.78 1107 3.06 2.39 0.78 1175 2.82 2.20 0.78 1220 26 20 3.50 2.31 0.66 1153 3.26 2.15 0.66 1209 3.03 2.00 0.66 1277 26 22 3.71 2.00 0.54 1198 3.47 1.87 0.54 1266 3.23 1.74 0.54 1311 26 24 3.91 1.64 0.42 1243 3.67 1.54 0.42 1300 3.47 1.46 0.42 1356 26 26 4.11 1.23 0.30 1288 3.88 1.16 0.30 1345 3.64 1.09 0.30 1401 27 18 3.33 2.73 0.82 1107 3.06 2.51 0.82 1175 2.82 2.31 0.82 1220 27 20 3.50 2.45 0.70 1153 3.26 2.28 0.70 1209 3.03 2.12 0.70 1277 27 22 3.71 2.15 0.58 1198 3.47 2.01 0.58 1266 3.23 1.87 0.58 1311 27 24 3.91 1.80 0.46 1243 3.67 1.69 0.46 1300 3.47 1.60 0.46 1356 27 26 4.11 1.40 0.34 1288 3.88 1.32 0.34 1345 3.64 1.24 0.34 1401 28 18 3.33 2.87 0.86 1107 3.06 2.63 0.86 1175 2.82 2.43 0.86 1220 28 20 3.50 2.59 0.74 1153 3.26 2.42 0.74 1209 3.03 2.24 0.74 1277 28 22 3.71 2.30 0.62 1198 3.47 2.15 0.62 1266 3.23 2.00 0.62 1311 28 24 3.91 1.96 0.50 1243 3.67 1.84 0.50 1300 3.47 1.73 0.50 1356 28 26 4.11 1.56 0.38 1288 3.88 1.47 0.38 1345 3.64 1.38 0.38 1401 29 18 3.33 3.00 0.90 1107 3.06 2.75 0.90 1175 2.82 2.54 0.90 1220 29 20 3.50 2.73 0.78 1153 3.26 2.55 0.78 1209 3.03 2.36 0.78 1277 29 22 3.71 2.45 0.66 1198 3.47 2.29 0.66 1266 3.23 2.13 0.66 1311 29 24 3.91 2.11 0.54 1243 3.67 1.98 0.54 1300 3.47 1.87 0.54 1356 29 26 4.11 1.73 0.42 1288 3.88 1.63 0.42 1345 3.64 1.53 0.42 1401 30 18 3.33 3.13 0.94 1107 3.06 2.88 0.94 1175 2.82 2.65 0.94 1220 30 20 3.50 2.87 0.82 1153 3.26 2.68 0.82 1209 3.03 2.48 0.82 1277 30 22 3.71 2.59 0.70 1198 3.47 2.43 0.70 1266 3.23 2.26 0.70 1311 30 24 3.91 2.27 0.58 1243 3.67 2.13 0.58 1300 3.47 2.01 0.58 1356 30 26 4.11 1.89 0.46 1288 3.88 1.78 0.46 1345 3.64 1.67 0.46 1401 31 18 3.33 3.27 0.98 1107 3.06 3.00 0.98 1175 2.82 2.77 0.98 1220 31 20 3.50 3.01 0.86 1153 3.26 2.81 0.86 1209 3.03 2.60 0.86 1277 31 22 3.71 2.74 0.74 1198 3.47 2.57 0.74 1266 3.23 2.39 0.74 1311 31 24 3.91 2.42 0.62 1243 3.67 2.28 0.62 1300 3.47 2.15 0.62 1356 31 26 4.11 2.06 0.50 1288 3.88 1.94 0.50 1345 3.64 1.82 0.50 1401 32 18 3.33 3.33 1.00 1107 3.06 3.06 1.00 1175 2.82 2.82 1.00 1220 32 20 3.50 3.15 0.90 1153 3.26 2.94 0.90 1209 3.03 2.72 0.90 1277 32 22 3.71 2.89 0.78 1198 3.47 2.71 0.78 1266 3.23 2.52 0.78 1311 32 24 3.91 2.58 0.66 1243 3.67 2.42 0.66 1300 3.47 2.29 0.66 1356 32 26 4.11 2.22 0.54 1288 3.88 2.09 0.54 1345 3.64 1.96 0.54 1401

Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT

35 40 46

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

OUTDOOR DB (°C)

Page 23

PERFORMANCE DATA HEAT operation at Rated frequency

MUZ-HC25VA

CAPACITY: 3.2 kW INPUT: 880 W

INDOOR

DB (°C)

15 2.02 572 2.43 686 2.85 774 3.26 836 3.68 889 4.06 915 4.48 933 21 1.92 616 2.30 730 2.72 810 3.10 871 3.52 915 3.90 942 4.30 977 26 1.73 660 2.14 774 2.53 854 2.94 915 3.36 959 3.74 986 4.16 1012

-10 -5 0 5 10 15 20

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT

OUTDOOR WB (°C)

MUZ-HC35VA MUZ-HC35VAB

CAPACITY: 3.6 kW INPUT: 995 W

INDOOR

DB (°C)

15 2.27 647 2.74 776 3.20 876 3.67 945 4.14 1005 4.57 1035 5.04 1055 21 2.16 697 2.59 826 3.06 915 3.49 985 3.96 1035 4.39 1065 4.84 1104 26 1.94 746 2.41 876 2.84 965 3.31 1035 3.78 1085 4.21 1114 4.68 1144

-10 -5 0 5 10 15 20

Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT

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

OUTDOOR WB (°C)

Page 24

ACTUATOR CONTROL

MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB

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.

5 seconds 15 seconds

Compressor

OFF

Outdoor fan motor

OFF

9-2. R.V. COIL CONTROL

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

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

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

Compressor

R.V.coil

Outdoor fan motor

ON OFF OFF

ON OFF

<COOL>

<HEAT>

5 seconds

9-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR

Sensor Purpose

Discharge temperature thermistor Protection

Indoor coil temperature thermistor

Defrost thermistor

Fin temperature thermistor Protection

HC35VA-

HC35VAB-

Cooling: Coil frost prevention

Heating: High pressure protection

Cooling: High pressure protection

Heating: Defrosting

Compressor LEV

○○ ○ ○ ○○○ ○○○○○ ○○

5 seconds

Actuator

Outdoor fan

motor

R.V. coil

Indoor fan

motor

Page 25

SERVICE FUNCTIONS

MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB

10-1. CHANGE IN DEFROST SETTING

<JS> When the JS wire of the inverter P.C. board is cut/ soldered, the defrost finish temperature is changed. (Refer to

11-6-1.)

Jumper wire Defrost ﬁ nish temperature (°C)

Soldered

(Initial setting)

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 outside temperature is 20°C or below. When pre-heat control is turned ON, compressor is energized. (About 50 W)

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

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

None

(Cut)

SERVICE FUNCTIONS

MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB

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 to 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.

Lead wiring

Housing point

3. Troubleshooting procedure

1) First, 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 abnormality indication is flashing on and off before starting service work.

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

3) If the electronic control P.C. board is supposed 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.

Page 26

11-2. FAILURE MODE RECALL FUNCTION

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. This mode is very useful when the unit needs to be repaired for the abnormality which doesn't recur.

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

Operational procedure

The cause of abnormality cannot be found because the abnormality doesn't recur.

Setting up the failure mode recall function

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

While pressing both OPERATION SELECT button and TOO COOL button on the

remote controller at the same time, press RESET button.

First, release RESET button.

And release the other two buttons after all LCD in operation display section of the

remote controller is displayed after 3 seconds.

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

1. Regardless of normal or abnormal condition, a short

Does the upper 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

emitted at the same timing as the blinking of the upper lamp of OPERATION INDICATOR lamp. 2

Judgment of indoor/outdoor abnormality

Before blinking, does the upper 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. 2

Yes (Blinks)

No (OFF)

Yes

Indoor unit is normal. But the outdoor unit might be abnormal because there are some abnormalities that can't 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)

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

beep is emitted once the signal is received.

Releasing the failure mode recall function

Deleting the memorized abnormal condition

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 defective parts.

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.

NOTE: 1. Make sure to release the failure mode recall function once it's 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.

2. Blinking pattern when the indoor unit is abnormal:

2.5-second OFF

Blinking at 0.5second interval

2.5-second OFF

Blinking at 0.5second interval

OFF

Repeated cycle Repeated cycle

Beeps

3.Blinking pattern when the outdoor unit is abnormal:

2.5-second OFF 3-second ON

Blinking at 0.5second interval

Beeps

Repeated cycle

2.5-second OFF 3-second ON

OFF

No beep Beeps

Repeated cycle

No beep Beeps

Repeated cycle

Beeps

Blinking at 0.5-

second interval

Repeated cycle

Page 27

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

Operational procedure

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

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

With the remote controller headed towards the indoor unit, press TOO COOL or TOO WARM button to adjust the set temperature to 25°C.

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

Does the upper 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 upper lamp of OPERATION INDICATOR lamp. 2

Yes (Blinks

)

No (OFF)

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

The outdoor unit is normal.

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.

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

Repair the defective parts.

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 once it's 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.

2.Blinking pattern when outdoor unit is abnormal:

2.5-second OFF 3-second ON

OFF

No beep

Repeated cycle

Blinking at 0.5second interval

Beeps

2.5-second OFF 3-second ON

No beep Beeps

Repeated cycle

Blinking at 0.5second interval

Repeated cycle

Page 28

3. Outdoor unit failure mode table

The upper

lamp of

OPERATION

INDICTOR

lamp (Indoor

unit)

OFF None (Normal)

2-time ﬂ ash

2.5 seconds OFF

3-time ﬂ ash

2.5 seconds OFF

4-time ﬂ ash

2.5 seconds OFF

5-time ﬂ ash

2.5 seconds OFF

6-time ﬂ ash

2.5 seconds OFF

7-time ﬂ ash

2.5 seconds OFF

9-time ﬂ ash

2.5 seconds OFF

10-time ﬂ ash

2.5 seconds OFF

11-time ﬂ ash

2.5 seconds OFF

12-time ﬂ ash

2.5 seconds OFF

14-time ﬂ ash

2.5 seconds OFF

Abnormal point

(Failure mode / protection)

Outdoor power system

Discharge temperature thermistor

Defrost thermistor

Fin temperature thermistor 3-time ﬂ ash 2.5

P.C. board temperature thermistor

Overcurrent 11-time ﬂ ash 2.5

Compressor synchronous abnormality (Compressor start-up failure protection)

Discharge temperature

High pressure

Fin temperature/ P.C. board temperature

Nonvolatile memory data 5-time ﬂ ash 2.5

Discharge temperature

DC voltage 8-time ﬂ ash 2.5

Each phase current of compressor

Overcurrent Compressor open-phase

Stop valve (Closed valve) 14-time ﬂ ash 2.5

LED indication

(Outdoor P.C. board)

—— ———

—

1-time ﬂ ash every

2.5 seconds

seconds OFF 4-time ﬂ ash 2.5

seconds OFF

12-time ﬂ ash 2.5 seconds OFF

—

7-time ﬂ ash 2.5 seconds OFF

seconds OFF

—

seconds OFF 9-time ﬂ ash 2.5

seconds OFF 10-time ﬂ ash 2.5

seconds OFF

Condition Correspondence

Over current protection stop is continuously performed 3 times within 1 minute after the compressor gets started.

Thermistor shorts or opens during compressor running.

12 A (HC25) / 14 A (HC35) current ﬂ ow into intelligent power module.

Waveform of compressor current is distorted.

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.

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

Temperature of ﬁ n temperature thermistor on the inverter P.C. board exceeds 82°C (HC25) / 83°C (HC35), or temperature of P.C. board temperature thermistor on the inverter P.C. board exceeds 81°C (HC25) / 85° C (HC35).

Nonvolatile memory data cannot be read properly.

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

DC voltage of inverter cannot be detected normally.

Each phase current of compressor cannot be detected normally.

12 A (HC25) / 14 A (HC35) current ﬂ ow into intelligent power module (IPM). When the open-phase operation of compressor is detected. When the interphase short out occurs in the output of the intelligent power module (IPM). When the compressor winding shorts out.

Closed valve is detected by compressor current.

• Reconnect connectors.

• Refer to 11-5. ”How to check inverter/ compressor”.

• Check stop valve.

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

• Reconnect compressor connector.

• Refer to 11-5. ”How to check inverter/ compressor”.

• Check stop valve.

• Reconnect compressor connector.

• Refer to 11-5. ”How to check inverter/ compressor”.

• Check refrigerant circuit and refrigerant amount.

• Refer to 11-5. ”Check of LEV”.

• Check refrigerant circuit and refrigerant amount.

• Check stop valve.

• Check around outdoor unit.

• Check outdoor unit air passage.

• Refer to 11-5. ”Check of outdoor fan motor”.

• Replace the inverter P.C. board.

• Refer to 11-5. ”Check of LEV”.

• Check refrigerant circuit and refrigerant amount.

• Refer to 11-5. ”How to check inverter/ compressor”.

• Reconnect compressor connector.

• Refer to 11-5. ”How to check inverter/ compressor”.

• Check stop valve.

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

Indoor/outdoor

unit failure

mode recall

function

Outdoor unit failure mode

recall function

○○

—

○

○○

—

○

○○

Page 29

11-3. TROUBLESHOOTING CHECK TABLE

No. Symptom LED indication

Outdoor unit does not oper-

ate.

‘Outdoor unit stops and

restarts 3 minutes later’ is repeated.

Outdoor unit

operates.

Outdoor unit

operates.

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”.

1-time ﬂ ash every

2.5 seconds

6-time ﬂ ash 2.5 seconds OFF

11-time ﬂ ash 2.5 seconds OFF

14-time ﬂ ash 2.5 seconds OFF

2-time ﬂ ash 2.5 seconds OFF

3-time ﬂ ash 2.5 seconds OFF

4-time ﬂ ash 2.5 seconds OFF

5-time ﬂ ash 2.5 seconds OFF

8-time ﬂ ash 2.5 seconds OFF

12-time ﬂ ash 2.5 seconds OFF

13-time ﬂ ash 2.5 seconds OFF

1-time ﬂ ash 2.5 seconds OFF

3-time ﬂ ash 2.5 seconds OFF

4-time ﬂ ash 2.5 seconds OFF

7-time ﬂ ash 2.5 seconds OFF

8-time ﬂ ash 2.5 seconds OFF

9-time ﬂ ash 2.5 seconds OFF

Abnormal point /

Condition

Outdoor power system

Outdoor thermistors Discharge temperature thermistor, ﬁ n temperature thermistor,

Outdoor control system

Serial signal The communication fails between the indoor and outdoor unit

Stop valve / Closed valve

Outdoor unit (Other abnormality)

Overcurrent protection

Discharge temperature overheat protection

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

High pressure protection

Compressor synchronous abnormality

Each phase current of compressor

DC voltage DC voltage of inverter cannot be detected normally.

Frequency drop by current protection

Frequency drop by high pressure protection

Frequency drop by defrosting in COOL mode

Frequency drop by discharge temperature protection

Low discharge temperature protection

PAM protection PAM: Pulse Amplitude Modulation

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

Over current protection stop is continuously performed 3 times within 1 minute after the compressor gets started, or failure of restart of compressor has repeated 24 times.

defrost thermistor, P.C. board temperature thermistor shorts or opens during compressor running.

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

for 3 minutes. Closed valve is detected by compressor current. • Check stop valve.

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

12 A (HC25) / 14 A (HC35) current ﬂ ows into intelligent power module.

When overcurrent protection occurs within 10 seconds after

compressor starts, compressor restarts after 15 seconds.

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.

Temperature of ﬁ n temperature thermistor on the heat sink ex- ceeds 82°C (HC25) / 83°C (HC35) or temperature of P.C. board temperature thermistor on the inverter P.C.board exceeds 81°C (HC25) / 85°C (HC35).

Indoor coil thermistor exceeds 70°C in HEAT mode. When the defrost thermistor exceeds 70°C in COOL mode.

The waveform of compressor current is distorted. • Reconnect connector of compres-

Each phase current of compressor cannot be detected normally • Refer to 11-5. “How to check in-

Current from power outlet exceeds 5.2 A (HC25) / 6.1 A (HC35), compressor frequency lowers.

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

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

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

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

The overcurrent ﬂ ows into IGBT (Insulated Gate Bipolar tran- sistor: TR821) or when the bus-bar voltage reaches 320 V or more, PAM stops and restarts.

mode starts.

Condition Correspondence

• Reconnect connector of compressor.

• Refer to 11-5. “How to check inverter/compressor”.

• Check stop valve.

• Refer to 11-5. thermistors”.

• Replace inverter P.C. board.

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

detailed outdoor unit failure mode recall function”.

• Reconnect connector of compressor.

• Refer to 11-5. “How to check inverter/compressor”.

• Check stop valve.

• Check refrigerant circuit and refrigerant amount.

• Refer to 11-5.

• Check around outdoor unit.

• Check outdoor unit air passage.

• Refer to 11-5. fan motor”.

• Check refrigerant circuit and refrigerant amount.

• Check stop valve.

sor.

• Refer to 11-5. verter/compressor”.

verter/compressor”.

The unit is normal, but check the fol-

lowing.

• Check if indoor ﬁ lters are clogged.

• Check if refrigerant is short.

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

• Check refrigerant circuit and refrigerant amount.

• Refer to 11-5. ”Check of LEV”.

• Refer to 11-5. thermistors”.

• Refer to 11-5.

• Check refrigerant circuit and refrigerant amount.

• 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.

• Check if the connector of the compressor is correctly connected.

• Refer to 11-5. “How to check inverter/compressor”.

“Check of outdoor

”Check of LEV”.

“Check of outdoor

“How to check in-

“Check of outdoor

”Check of LEV”.

Inverter P.C. board (Parts side)

Flashing

LED

OFF

2.5-second OFF

0.5-second ON

2.5-second OFF

0.5-second ON

Page 30

11-4. TROUBLE CRITERION OF MAIN PARTS

MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB

Part name Check method and criterion Figure

Defrost thermistor (RT61)

Discharge temperature thermistor (RT62) Fin temperature thermistor (RT64)

Compressor (MC)

Outdoor fan motor (MF) INNER FUSE RA6V21-AB

°C CUT OFF

152

-5

RA6V21-BB 126 ± 2: CUT OFF

R.V. coil (21S4)

Measure the resistance with a tester.

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

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

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

Measure the resistance between the terminals with a tester. (Part temperature -10 – 40°C)

Normal

U-V

MUZ-HC25 MUZ-HC35

U-W

V-W

1.65 – 2.03 Ω 1.49 – 1.84 Ω

Measure the resistance between the terminals with a tester. (Part temperature -10 – 40°C)

Color of lead wire

RA6V21-AB RA6V21-BB, BD

Normal

WHT – BLK 305 – 374 Ω 222 – 272 Ω

BLK – RED 247 – 304 Ω 245 – 300 Ω

Measure the resistance between the terminals with a tester. (Part temperature -10˚C – 40°C)

Normal

1.32 – 1.62 kΩ

WHT

FUSE

RED BLK

BLK

RED

WHT

Expansion valve coil (LEV)

HC35VAHC35VAB-

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

Color of lead wire Normal

WHT – RED

RED – ORN YLW – BRN

38 – 50 Ω

BRN – BLU

WHT

RED

ORN

YLW

LEV

BRN

BLU

Page 31

11-5. TROUBLESHOOTING FLOW

A How to check inverter/compressor

Disconnect the connector (CN61) between compressor and the intelligent power module (IPM).

Check the voltage between terminals.

Are the voltages balanced?

Yes

Check the compressor.

See 11-5. “Check of open phase”.

Replace the inverter P.C. board.

See 11-5. “Check of compressor”.

B Check of open phase

● With the connector between the compressor and the intelligent power module disconnected, activate the inverter and check if

the inverter is normal by measuring the balance of voltage 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 OPERATION : 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.

Page 32

C Check of compressor

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

Replace the compressor.

Yes

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

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

Yes

OK.

D Check of compressor winding

● Disconnect the connector (CN61) between the compressor and intelligent power module, and measure the resistance be-

tween 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.

E Check of compressor operation time

● 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.

<<Judgement>>

0 second

1 second

2 seconds

10 seconds

10 minutes

Compressor starts

Abnormal (IPM failure) (Compressor winding short)

Abnormal (Compressor lock out) (Starting defect)

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

Abnormal (Refrigerant circuit defect) (Closed valve)

Normal

Page 33

F Check of compressor start failure

Conﬁ rm that ~ is normal.

•Electrical circuit check . Contact of the compressor connector (Including CN61) . 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

)

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

Yes

Check the refrigerant circuit. Check the stop valve.

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

Replace the compressor.

Yes

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

G Check of outdoor thermistors

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

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

Yes

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

Heating part

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

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?

Replace the inverter P.C. board.

Yes

OK. (Cause is poor contact.)

Thermistor Symbol Connector, Pin No. Board

Defrost RT61 Between CN641 pin1 and pin2

Fin temperature RT64 Between CN642 pin1 and pin2

Inverter P.C. boardDischarge temperature RT62 Between CN641 pin3 and pin4

Page 34

H Check of R.V. coil

First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 11-4. In case CN721 is not connected or R.V. coil is open, voltage is generated between the terminal pins of the connector

although any signal is not being transmitted to R.V. coil.

Check if CN721 is connected.

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

Disconnect connector (CN61) between the compressor and the intelligent power module. Turn ON the power supply and press EMERGENCY OPERATION switch twice (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 4-way valve.

Replace the inverter

P.C. board.

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

Disconnect connector (CN61) between the compressor and the intelligent power module. Turn ON the power supply and press EMERGENCY OPERATION switch once (COOL mode).

Is there 230 VAC between CN721 and

on the inverter P.C. board 3 minutes

after the power supply is turned ON?

Replace the inverter

Yes

P.C. board.

I Check of outdoor fan motor

Check the resistance of fan motor. (Refer to 11-4.)

Is the resistance of fan motor normal?

Disconnect the connector CN771 on the inverter P.C. board. Disconnect the connector (CN61) between compressor and power transistor module. Turn ON the power supply and press the EMERGENCY OPERATION switch.

Does the upper lamp of OPERATION INDICATOR lamp on the indoor unit light up?

Yes

Replace the 4-way valve.

Replace the outdoor fan motor.

After 3 minutes, is there voltage 230 VAC between CN771 and

on the inverter P.C.

board?

Replace the outdoor fan motor.

Yes

Replace the inverter P.C. board.

Page 35

J Check of power supply

Disconnect the connector (CN61) between compressor and intelligent power module. Turn ON power supply and press EMERGENCY OPERATION switch.

Does the upper lamp of OPERATION INDICATOR lamp on the indoor unit light up?

Yes

Rectify indoor/outdoor connecting wire.

Yes

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

Replace the indoor electronic control P.C.

board.

Is there voltage 280 - 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

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

Yes

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

Replace the inverter

P.C. board.

DB61

Inverter P.C. board (Solder side)

280 ~ 370 VDC

Page 36

K How to check miswiring and serial signal error

Turn OFF the power supply.

Is there rated voltage in the power supply?

Yes

Turn ON the power supply.

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

Press EMERGENCY OPERATION switch once.

Does the upper lamp of OPERATION INDICATOR lamp light up? <Conﬁ rmation of the power to the indoor unit>

Is serial signal error indicated 6 minutes later?

Turn OFF the power supply. Check once more if the indoor/outdoor

connecting wire is not miswiring. Short-circuit outdoor terminal block S2 and S3.

Turn ON the power supply.

Yes

Check the power supply.

Check the wiring.

Is there any miswiring, poor contact, or wire disconnection of the

indoor/outdoor connecting wire?

1. Miswiring may damage indoor P.C. board during the operation. Be sure to conﬁ rm the wiring is correct before the opera- tion starts.

3. Be sure to check this within 3 minutes after turning ON. After 3 minutes, LED blinks 6 times. Even when the inverter P.C. board or the outdoor electronic control P.C. board is normal, LED blinks 6 times after 3 minutes.

Yes

Correct them.

Turn OFF inverter-controlled lighting

• equipment. Turn OFF the power supply and then

• turn ON again. Press EMERGENCY OPERATION

• switch.

Reinstall

• either the unit or the light each other

•

away. Attach a ﬁ lter on remote control receiving section of the indoor unit.

Is serial signal error indicated 6 minutes later?

Yes

Does the LED on the inverter P.C. board or the outdoor electronic control P.C. board repeat "3.6-second-OFF and 0.8-secondON quick blinking"? 3

Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S2 and S3. Turn ON the power supply. Is there amplitude of 10 to 20 VDC between indoor terminal block S2 and S3? <Conﬁ rmation of serial signal> Is there rated voltage between indoor terminal block S1 and S2? <Conﬁ rmation of power voltage>

Is there 2 VDC or less between CN10A (+) and JPG (GND)(-) on the indoor electronic control P.C. board?

Replace the indoor power P.C. board and the indoor terminal P.C. board

Be sure to release the failure-mode recall function after checking.

Yes

Is there 2 VDC or less between CN10A (+) and JPG (GND)(-) on the indoor electronic control P.C. board?

No Yes No

No (Lighted or not lighted)

Replace the indoor electronic control P.C. board.

Replace the inverter P.C. board or the outdoor electronic control P.C. board.

2. Be careful to the residual

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

voltage of smoothing capacitor.

Yes

Is there 2 VDC or less between CN10A (+) and JPG (GND)(-) on the indoor electronic control P.C. board?

Replace the indoor/outdoor connecting wire.

Yes

Page 37

L Check of LEV (Expansion valve)

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

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

And release the other two buttons after all LCD except

the set temperature in operation display section of the remote controller is displayed after 3 seconds.

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.

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

Yes

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

Is LEV coil properly ﬁ xed to the expansion valve?

Yes

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

Replace the LEV coil.

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

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

2. Press RESET button on the remote controller.

Yes

Properly ﬁ x the LEV coil to the expansion valve.

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

1. 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

(-) — Pin (+)

tester.

Replace the expansion valve.

Yes

Replace the inverter P.C.

board.

Page 38

M Electromagnetic noise enters into TV sets or radios

Is the unit earthed?

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?

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?

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

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

Yes

Earth the unit.

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

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

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

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.

Page 39

11-6. TEST POINT DIAGRAM AND VOLTAGE

1. Inverter P.C. board

MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB

Back side of unit

DB61 280 V ~ 370 V DC

(+)

(-)

Output to drive compressor (LDW, LDV, LDU)

LED monitor lamp

230V AC DB61

Smoothing capacitor (C62)

Fuse (F801)

Smoothing capacitor (C61)

Varistor (NR63)

Varistor (NR62)

Varistor (NR61)

Jumper wire for change

in defrost setting (JS)

Fuse (F701)

Jumper wire for pre-heat

control setting (JK)

Front side of unit

Defrost thermistor (RT61)

100

Resistance (kΩ)

-20 -10 0 10 20 30 40 Temperature (°C)

LEV (CN724)

Fin temperature

thermistor/RT64

(CN642)

Discharge temperature

thermistor/RT62

Defrost thermistor/RT61

(CN641)

Discharge temperature thermistor (RT62)

700

600

500

400

300

200

Resistance (kΩ)

100

0 102030405060708090100110120

Temperature (°C)

(CN641)

R.V.coil (CN721)

Output to drive outdoor fan motor (CN771)

Fin temperature thermistor (RT64)

200

180

160

140

120

100

Resistance (kΩ)

0 1020304050607080

Temperature (°C)

Page 40

DISASSEMBLY INSTRUCTIONS

<"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.

(1) Slide the sleeve and check if there is a locking lever or not.

Sleeve

Slide the sleeve. Pull the terminal while

Locking lever

pushing the locking lever.

(2) The terminal with this connector has the locking mechanism.

12-1. MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB

OPERATING PROCEDURE PHOTOS

1. Removing cabinet and panels

(1)

Remove the screw fixing the service panel. (Photo 2)

(2)

Pull down the service panel and remove it. (Photo 2)

(3) Disconnect the power supply and indoor/outdoor con-

necting wire.

(4)

Remove the screws fixing the top panel. (Photo 1) (5) Remove the top panel. (Photo 1) (6) Remove the screws fixing the cabinet. (Photo 1) (7) Remove the cabinet. (8) Remove the screws fixing the back panel. (9) Remove the back panel.

Photo 1

Hold the sleeve, and pull out the terminal slowly.

Connector

NOTE: Turn OFF power supply before disassembling.

Screws of the top panel

Photo 2

Screw of the

service panel

Direction to remove

Hooks

Screws of the cabinet

Service

panel

Page 41

OPERATING PROCEDURE PHOTOS

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

(1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the earth wires (Photo 3), the lead wire to

the reactor and the following connectors;

<Inverter P.C. board> CN641 (Defrost thermistor and discharge temperature

thermistor) CN721 (4-way valve) CN771 (Fan motor)

(3) Disconnect the compressor connector (CN61). (4)

Remove the screws fixing the relay panel. (Photo 3)

(5) Remove the inverter assembly. (See Photo 4.) (6) Remove the inverter P.C. board from the inverter

assembly.

3. Removing R.V. coil

(1) Remove the cabinet and panels. (Refer to 1.) (2) Remove the R.V. coil. (Photo 5)

Photo 3

Screws of the relay panel

Screw of the earth wires

Photo 4 (Inverter assembly)

Inverter P.C. board

Heat sink

4. Removing the discharge temperature thermistor and

defrost thermistor

(1) Remove the cabinet and panels. (Refer to 1.) (2) Pull out the discharge temperature thermistor from its

holder. (Photo 6)

(3) Pull out the defrost thermistor from its holder. (Photo 5)

Photo 5

R.V. coil

Defrost thermistor

Page 42

OPERATING PROCEDURE PHOTOS

5. Removing outdoor fan motor

(1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the connectors for outdoor fan motor. (3) Remove the propeller nut. (Photo 7) (4) Remove the propeller. (Photo 7) (5)

Remove the screws fixing the fan motor. (Photo 7)

(6) Remove the fan motor.

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 pres-

sure gauge shows 0 MPa (0 kg/cm2).

(4) Detach the welded part of the suction and the dis-

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

valve. (Photo 8)

Photo 6

Discharge temperature thermistor

Photo 7

Propeller

Photo 8

Welded parts of 4-way valve

Screws of the outdoor fan motor

Page 43

Page 44

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

Copyright 2007 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Aug. 2008. No. OBH467 REVISED EDITION-B 6 Distributed in Mar. 2007. No. OBH467 REVISED EDITION-A 6 Distributed in Jan. 2007. No. OBH467 6 Made in Japan

New publication, effective Aug. 2008 Specifications subject to change without notice.

Mitsubishi MUZ-HC25VA-E1, MUZ-HC35VA-E1, MUZ-HC35VA-E2, MUZ-HC35VAB-E1, MUZ-HC35VAB-E2 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual