Mitsubishi MSZ-GE22VA-E1, MSZ-GE25VA-E1, MSZ-GE35VA-E1, MSZ-GE42VA-E1, MSZ-GE50VA-E1 Service Manual

SPLIT-TYPE AIR CONDITIONERS

INDOOR UNIT

SERVICE MANUAL

Models

Revision B:

• MSZ-GE42/50VA - E1 has been added.

Please void OBH515 REVISED EDITION-A.

No. OBH515

REVISED EDITION-B

MSZ-GE22VA MSZ-GE25VA MSZ-GE35VA MSZ-GE42VA MSZ-GE50VA -

Outdoor unit service manual MUZ-GE·VA Series (OBH516) MXZ-A·VA Series (OB377) MXZ-8A140A (OC316)

CONTENTS

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

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

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

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

5. OUTLINES AND DIMENSIONS ························ 7

6. WIRING DIAGRAM ············································ 8

7. REFRIGERANT SYSTEM DIAGRAM ··············· 9

8. SERVICE FUNCTIONS ··································· 10

9. MICROPROCESSOR CONTROL ··················· 12

10. TROUBLESHOOTING ····································· 18

11. DISASSEMBLY INSTRUCTIONS ···················· 32

NOTE:

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

PARTS CATALOG (OBB515)

Revision A:

• 11. DISASSEMBLY INSTRUCTIONS has been corrected. 11-6. Photo 9 has been changed.

Revision B:

• MSZ-GE42/50VA - E1 has been added.

TECHNICAL CHANGES

MSZ-GE22VA MSZ-GE25VA MSZ-GE35VA MSZ-GE42VA MSZ-GE50VA -

1. New model.

PART NAMES AND FUNCTIONS

MSZ-GE22VA MSZ-GE25VA MSZ-GE35VA MSZ-GE42VA MSZ-GE50VA

Air ﬁlter (Catechin air ﬁlter)

Air cleaning ﬁlter (Anti-Allergy Enzyme Filter, option)

Air inlet

Front panel

Heat exchanger

ACCESSORIES

Installation plate 1 Installation plate ﬁ xing screw 4 × 25 mm 5 Remote controller holder 1 Fixing screw for 3.5 × 1.6 mm (Black) 2 Battery (AAA) for remote controller 2 Wireless remote controller 1 Felt tape (Used for left or left-rear piping) 1

Air outlet

Fan guard

Fan

Horizontal vane

Vertical vane

Remote control receiving section

Operation indicator lamp

Emergency operation switch (E.O. SW)

Remote controller

Electrical

data

Fan

motor Dimensions W × H × D mm 798 × 295 × 232 Weight kg

Special remarks

Remote controller model KM09A

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

2 For multi system.

SPECIFICATION

Indoor model MSZ-GE22VA MSZ-GE25VA MSZ-GE35VA MSZ-GE42VA MSZ-GE50VA

Power supply Single phase 230 V, 50 Hz

Power input 1

Running current 1

Model RC0J40-FK

Current 1

Air direction 5

Airﬂ ow

Sound level

Fan speed

Fan speed regulator 5

1 Measured under rated operating frequency.

Cooling Heating 23 Cooling Heating 0.23

Cooling Heating 0.23 0.31 0.36

Super High High Med.

Cooling

Low Silent Super High High Med. Low

Heating

Silent Super High High Med.

Cooling

Low Silent Super High High Med. Low

Heating

Silent Super High High 860 950 1,060 Med. 670 670 (690 Low 530 680 750

Cooling

Silent 470 600 650 (690 2) Super High High 860 (700 2) 950 (930 2) 1,080 (930 2) Med. 670 (610 Low 530

Heating

Silent 470

dB(A)

rpm

22 29

0.22 0.29

678

762 768 906

546 (552 2)

402 402 (414 2)

288 (276 2) 288

246 690 786 870 546 624 732

396 402 516 576

288 (276 2) 288 420 468

246 348 390

43 46 49

36 29 21

30 35 38 22 30 33

42 46 48

36 40 43 29 30 35 37 21 22 30 33

19 26 28

1,020 1,120 1,120 1,280

2) 810 890

1,040 1,140 1,240

2) 810 890 (840 2)

Specifications and rating conditions of main electric parts

Fuse Horizontal vane motor (MV) 12 VDC Varistor (NR11) S10K300E3K1 (ERZV14D471) Terminal block

F11)

(

(TB)

T3.15AL250V

30 39

0.39

0.31 0.36

0.39

624 714 516 576 408 468 348 390

40 44

26 28

690 750 600 650

NOISE CRITERIA CURVES

MSZ-GE22VA MSZ-GE25VA

FAN SPEED

Super High

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

FUNCTION

COOLING

HEATING

SPL(dB(A))

42 42

NC-10

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

MSZ-GE35VA

FAN SPEED

Super High

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

FUNCTION

COOLING

HEATING

SPL(dB(A))

43 42

NC-10

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

MSZ-GE42VA

FAN SPEED

Super High

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

FUNCTION

COOLING

HEATING

SPL(dB(A))

46 46

NC-10

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

MSZ-GE50VA

FAN SPEED

Super High

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

FUNCTION

COOLING HEATING

SPL(dB(A))

49 48

NC-10

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

Test conditions

Cooling: Dry-bulb temperature 27°C

Wet-bulb temperature 19°C

Heating: Dry-bulb temperature 20°C

INDOOR UNIT

WALL

0.8m

MICROPHONE

OUTLINES AND DIMENSIONS

MSZ-GE22VA MSZ-GE25VA MSZ-GE35VA MSZ-GE42VA MSZ-GE50VA

Installation plate

798 785 6.5

232

295

159

11×26 Oblong hole

Indoor unit

13061950

254

212.5

100

Air out

Insulation ø35 O.D

Liquid line ø6.35 - 0.5 m (Flared connection ø6.35)

Gas line ø9.52 - 0.43 m

Piping

Drain hose Insulation ø28 O.D Connected part ø16 O.D

225 225

155 155

33861

315 84

Air in

Installation plate

Piping

107

112

(Flared connection: ø9.52 (22/25/35/42), ø12.7 (50))

11×20 Oblong hole

Drain hose

Unit: mm

211.5

Wall hole ø65

21.5

231.5

253

MSZ-GE22VA MSZ-GE25VA MSZ-GE35VA

MSZ-GE42VA MSZ-GE50VA

WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

MSZ-GE22VA MSZ-GE25VA MSZ-GE35VA MSZ-GE42VA MSZ-GE50VA

Refrigerant pipe ø9.52 (GE22/25/35/42) ø12.7 (GE50) (with heat insulator)

Indoor heat exchanger

Room temperature thermistor RT11

Indoor coil thermistor RT12 (main)

Indoor coil thermistor RT13 (sub)

Flared connection

Refrigerant pipe ø6.35 (with heat insulator)

Unit: mm

Refrigerant flow in cooling Refrigerant flow in heating

SERVICE FUNCTIONS

MSZ-GE22VA MSZ-GE25VA MSZ-GE35VA MSZ-GE42VA MSZ-GE50VA

8-1. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board. The time will be shortened as follows. (Refer to 10-7.2.) Set time: 1 minute → 1 second Set time: 3 minutes → 3 seconds (It takes 3 minutes for the compressor to start operation. However, the starting time is shortened by short circuit-of JPG and JPS.)

8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

A maximum of 4 indoor units with wireless remote controllers can be used in a room. In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be modified according to the number of the indoor unit.

How to modify the remote controller P.C. board

Remove batteries before modification. The board has a print as shown below:

NOTE: For modification, take out

the batteries and press the OPERATE/STOP (ON/ OFF) button twice or 3 times at first.

After modification, put back

the batteries then press the

RESET button.

The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1. After modification, press the RESET button.

Table 1

1 unit operation 2 units operation 3 units operation 4 units operation

No. 1 unit No modiﬁ cation Same as at left Same as at left Same as at left

No. 2 unit — Solder J1 Same as at left Same as at left

No. 3 unit — — Solder J2 Same as at left

No. 4 unit — — — Solder both J1 and J2

How to set the remote controller exclusively for particular indoor unit

After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit. The indoor unit will only accept the signal from the remote controller that has been assigned to the indoor unit once they are set. The setting will be cancelled if the breaker is turned OFF, or the power supply is shut down. Please conduct the above setting once again after the power has restored.

8-3. AUTO RESTART FUNCTION

When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation in the same mode just before the shutoff of the main power.

Operation

If the main power has been cut, the operation settings remain. After the power is restored, the unit restarts automatically according to the memory.

(However, it takes at least 3 minutes

for the compressor to start running.)

How to release “AUTO RESTART FUNCTION”

Turn off the main power for the unit. Solder the jumper wire to JR07 on the indoor electronic control P.C. board. (Refer to 10-7.2.)

Indoor electronic control P.C. board

JR07

CN 111CN112CN151CN10A

NOTE:

• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote

controller.

• If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is can-

celled.

• If the unit has been off with the remote controller before power failure, the auto restart function does not work as the

power button of the remote controller is OFF.

• To prevent breaker OFF due to the rush of starting current, systematize other home appliance not to turn ON at the same

time.

• When some air conditioners are connected to the same supply system, if they are operated before power failure, the

starting current of all the compressors may flow simultaneously at restart.

Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current

by adding to the system that allows the units to start one by one.

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