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

SPLIT-TYPE AIR CONDITIONERS

INDOOR UNIT

SERVICE MANUAL

Models

Revision B:

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

Please void OBH466 REVISED EDITION-A.

No. OBH466

REVISED EDITION-B

MSZ-HC25VA ­MSZ-HC35VA ­MSZ-HC35VA -

E1

E1

E2

MSZ-HC35VAB ­MSZ-HC35VAB -

E1

E2

Outdoor unit service manual
MUZ-HC·VA Series (OBH467)

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 ············································ 7

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

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

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

10. TROUBLESHOOTING ····································· 17

11. DISASSEMBLY INSTRUCTIONS ···················· 29

NOTE:

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

PARTS CATALOG (OBB466)

Revision A:

• 10. TROUBLESHOOTING has been corrected.

• Color of lead wire (indoor fan motor : sensor part) of 10-5. ”Trouble criterion of main parts” has been corrected.

• 10-6.”

Check of indoor fan motor” has been corrected. [MSZ-HC25]

Revision B:

• MSZ-HC35VA-E2 and MSZ-HC35VAB-E2 have been added.
Indoor coil thermistor (RT13) has been added.

2

1

TECHNICAL CHANGES

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

1. Indoor fan motor has been changed. (DC AC) [MSZ-HC25]

2. Indoor heat exchanger has been changed. [MSZ-HC35]

3. Indoor electronic control P.C. board has been changed.

MSZ-HC35VA - E1 → MSZ-HC35VA ­MSZ-HC35VAB - E1 → MSZ-HC35VAB -

1. Wiring diagram has been changed.

E1

E1

E1

E2

E2

3

2

PART NAMES AND FUNCTIONS

MSZ-HC25VA MSZ-HC35VA MSZ-HC35VAB

Air inlet

Air filter (Anti-mold)

Air outlet

Vertical vane

Horizontal vane

Remote control
receiving section

Emergency operation switch (E.O. SW)

Front panel

Remote controller

Operation Indicator
lamp

ACCESSORIES

Installation plate 1
Installation plate fi xing screw 4
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (Used for left or left-rear piping) 1

× 25 mm 5

4

3

Electrical

data

Fan motor

Dimensions W × H × D mm 788×295×225
Weight kg 9

Air fl ow

Air direction 4
Sound

level

Fan
speed

Special remarks

Fan speed regulator 4

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

Specifications and rating conditions of main electric parts

Fuse (F11) T3.15AL250V
Horizontal vane motor (MV) 12 VDC
Varistor
Terminal block (TB) 3P

SPECIFICATION

Indoor model MSZ-HC25VA MSZ-HC35VA MSZ-HC35VAB

Function Cooling Heating Cooling Heating Cooling Heating

Power supply Single phase, 230 V, 50 Hz
Running current
Power input 1 W 40 23
Model RC4V18-BA or CA RC0J40-ED
Current 1 A 0.22

(Super High)
(High/Med./Low) 522/420/318 468/390/306 504/408/312 480/402/294 504/408/312 480/402/294

(Super High)
(High/Med./Low) 38/32/26
(Super High)
(High/Med./Low) 950/800/650 870/750/630 980/830/680 940/820/660 980/830/680 940/820/660

Remote controller model MP06B

1 Measured under rated operating frequency.

1 A 0.22

m3/h

dB(A)

rpm

(NR11)

630 546 612 552 612 552

43

1,110 980 1,140 1,050 1,140 1,050

S10K320E3K1 (ERZV14D471)

5

4

NOISE CRITERIA CURVES

MSZ-HC25VA

90

80

70

60

50

40

30

FAN SPEED

Super High

FUNCTION

COOLING

HEATING

SPL(dB(A))

43
43

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

MSZ-HC35VA MSZ-HC35VAB

FAN SPEED

Super High

90

80

70

60

50

40

30

FUNCTION

COOLING

HEATING

SPL(dB(A))

43
43

LINE

NC-70

NC-60

NC-50

NC-40

NC-30

APPROXIMATE

20

THRESHOLD OF
HEARING FOR
CONTINUOUS

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-20

APPROXIMATE

20

THRESHOLD OF
HEARING FOR
CONTINUOUS

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

Test conditions
Cooling : Dry-bulb temperature 27°C Wet-bulb temperature 19°C

Heating : Dry-bulb temperature 20°C

NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-20

INDOOR UNIT

WALL

1m

0.8m

MICROPHONE

6

5

OUTLINES AND DIMENSIONS

MSZ-HC25VA MSZ-HC35VA MSZ-HC35VAB

788

2255

58

42

57

140

295

60753 128

18

42

58

Installation plate

50

11 × 26 Oblong hole

254.5

21540.5

Indoor unit

42

Unit : mm

11 × 20 Oblong hole

5959 225 225

155 155

Air in

8

100

Air out

Insulation ø35 O.D
Liquid line ø6.35 - 0.5 m (Flared connection ø6.35)

Piping

Gas line ø9.52 - 0.43 m (Flared connection ø9.52)

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

119
137

320335

Installation plate

Piping

42

57

Wall hole

Drain hose

18.5

235

214

2

7459

41.5

ø65

253.5

6

WIRING DIAGRAM

MSZ-HC25VA

7

MSZ-HC35VA-E1 MSZ-HC35VAB-

E2

MSZ-HC35VA-

MSZ-HC35VAB-

E1

E2

8

7

REFRIGERANT SYSTEM DIAGRAM

MSZ-HC25VA MSZ-HC35VA-E1 MSZ-HC35VAB-

Refrigerant pipe ø9.52
(with heat insulator)

Indoor
heat
exchanger

Room temperature
thermistor
RT11

Indoor coil
thermistor
RT12

E1

Unit : mm

Flared connection

Flared connection

Refrigerant pipe ø6.35
(with heat insulator)

Refrigerant flow in cooling
Refrigerant flow in heating

MSZ-HC35VA-

E2

MSZ-HC35VAB-

E2

Indoor
heat
exchanger

Room temperature
thermistor
RT11

Indoor coil
thermistor
RT12

Indoor coil
thermistor
RT13

Refrigerant pipe ø9.52
(with heat insulator)

Flared connection

Flared connection

Refrigerant pipe ø6.35
(with heat insulator)

Refrigerant flow in cooling
Refrigerant flow in heating

9

8

SERVICE FUNCTIONS

MSZ-HC25VA MSZ-HC35VA MSZ-HC35VAB

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.)
Set time : 1-minute → 1-second
Set time : 3-minute → 3-second (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 :

J2

J1

NOTE : For modification, take out

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

After finish 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 has turned OFF, or the power supply has shut down.
Please conduct the above setting once again after the power has restored.

10