Mitsubishi Electric SUZ-KA25VA5, SUZ-KA60VA5, SUZ-KA50VA5, SUZ-KA35VA5, SUZ-KA71VA5 Service Manual

TECHNICAL & SERVICE MANUAL

R410A

CONTENTS

1.

COMBINATION OF INDOOR AND OUTDOOR UNITS

.....

2

2. PARTS NAMES AND FUNCTIONS

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

3

3. SPECIFICATION

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

4

4. NOISE CRITERIA CURVES

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

6

5. OUTLINES AND DIMENSIONS

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

7

6. WIRING DIAGRAM

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

9

7. REFRIGERANT SYSTEM DIAGRAM

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

12

8. ACTUA TOR CONTROL

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

16

9. SERVICE FUNCTIONS

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

17

10. TROUBLESHOOTING

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

17

11. DISASSEMBLY PROCEDURE

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

34

Indication of
model name

Note:

•

This service manual describes
service data of the outdoor
units only.

HFC

utilized

R410A

SUZ-KA25VA5.TH
SUZ-KA35VA5.TH

PARTS CATALOG (OCB603)

No. OCH603

October 2015

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

[Model Name]

SUZ-KA25VA5

SUZ-KA35VA5

SUZ-KA50VA5

SUZ-KA60VA5

SUZ-KA71VA5

[Service Ref.]

SUZ-KA25VA5.TH
SUZ-KA25VA5.TH-ET
SUZ-KA35VA5.TH
SUZ-KA35VA5.TH-ET
SUZ-KA50VA5.TH
SUZ-KA50VA5.TH-ET
SUZ-KA60VA5.TH
SUZ-KA60VA5.TH-ET
SUZ-KA71VA5.TH
SUZ-KA71VA5.TH-ET

2

1

COMBINATION OF INDOOR AND OUTDOOR UNITS

INDOOR UNIT SERVICE MANUAL

Indoor unit

Outdoor unit

Heat pump type

SUZ-

Service Ref.

Service

manual No.

KA25VA5.TH

KA25VA5.TH-ET

KA35VA5.TH

KA35VA5.TH-ET

KA50VA5.TH

KA50VA5.TH-ET

KA60VA5.TH

KA60VA5.TH-ET

KA71VA5.TH

KA71VA5.TH-ET

Heat pump without electric heater

SLZ-KF25VA.TH

OCH600
OCB600

─ ─ ─ ─

SLZ-KF35VA.TH ─ ─ ─ ─
SLZ-KF50VA.TH ─ ─ ─ ─
SLZ-KF60VA.TH ─ ─ ─ ─
SEZ-KD25VAQR2.TH

HWE1008

BWE102040

(BWE014090)

─ ─ ─ ─

SEZ-KD35VAQR2.TH ─ ─ ─ ─
SEZ-KD50VAQR2.TH ─ ─ ─ ─
SEZ-KD60VAQR2.TH ─ ─ ─ ─
SEZ-KD71VAQR2.TH ─ ─ ─ ─
SEZ-KD25VALR2.TH

HWE0711

BWE012050

─ ─ ─ ─

SEZ-KD35VALR2.TH ─ ─ ─ ─
SEZ-KD50VALR2.TH ─ ─ ─ ─
SEZ-KD60VALR2.TH ─ ─ ─ ─
SEZ-KD71VALR2.TH ─ ─ ─ ─
PLA-RP35BAR4.UK

OCH412
OCB412

─ ─ ─ ─

PLA-RP50BAR4.UK ─ ─ ─ ─
PLA-RP60BAR4.UK ─ ─ ─ ─
PLA-RP71BAR4.UK ─ ─ ─ ─
PCA-RP35KAQR2

OCH491
OCB491

─ ─ ─ ─

PCA-RP50KAQR2 ─ ─ ─ ─
PCA-RP60KAQR2 ─ ─ ─ ─
PCA-RP71KAQR2 ─ ─ ─ ─
PEAD-RP35JAQR2.UK

BWE014160

─ ─ ─ ─

PEAD-RP50JAQR2.UK ─ ─ ─ ─
PEAD-RP60JAQR2.UK ─ ─ ─ ─
PEAD-RP71JAQR2.UK ─ ─ ─ ─
PEAD-RP35JALR2.UK

BWE09350

─ ─ ─ ─

PEAD-RP50JALR2.UK ─ ─ ─ ─
PEAD-RP60JALR2.UK ─ ─ ─ ─
PEAD-RP71JALR2.UK ─ ─ ─ ─

OCH603

3

2

PARTS NAMES AND FUNCTIONS

SUZ-KA25VA5
SUZ-KA35VA5

SUZ-KA50VA5
SUZ-KA60VA5
SUZ-KA71VA5

Air outlet

Drain outlet

Piping

Drain hose

Air inlet

(back and side)

Model SUZ-KA·VA5

Drain socket 1

Piping

Air outlet

Drain outlet

Air inlet

(back and side)

Drain hose

Piping

Air outlet

Drain outlet

Air inlet

(back and side)

Drain hose

OCH603

4

SPECIFICATION

3

Note: Test conditions are based on ISO 5151
Cooling : Indoor D.B. 27°C W.B. 19°C
Outdoor D.B. 35°C
Heating : Indoor D.B. 20°C
Outdoor D.B. 7°C W.B. 6°C
Refrigerant piping length (one way): 5 m
*Measured under rated operating frequency.

Outdoor model

SUZ-KA25VA5.TH
SUZ-KA25VA5.TH-ET

SUZ-KA35VA5.TH
SUZ-KA35VA5.TH-ET

SUZ-KA50VA5.TH
SUZ-KA50VA5.TH-ET

SUZ-KA60VA5.TH
SUZ-KA60VA5.TH-ET

SUZ-KA71VA5.TH
SUZ-KA71VA5.TH-ET

Power supply Single phase 230 V, 50 Hz

Compressor

Model KNB073FKFMC KNB092FFAMC SNB130FGBMT SNB172FEKMT
Output W 550 650 900 1,200

Current*

Cooling

A

2.76 4.06 5.58 6.62 8.02

Heating 3.24 4.09 5.75 6.37 8.13

Refrigeration oil
(Model)

L 0.31 (FV50S) 0.27 (FV50S) 0.35 (FV50S) 0.4 (FV50S)

Fan motor

Model RC0J50-NA RC0J60-BC RC0J60-BC
Current*

Cooling

A

0.24 0.29 0.84 0.84 0.83

Heating 0.27 0.28 0.93 0.93 0.82
Dimensions W × H × D mm 800 × 550 × 285 840 × 880 × 330
Weight kg 30 35 54 50 53

Special remarks

Air

ow*

Cooling

High

m³/h

1,806 2,868 3,492 3,426

Med. 1,806 2,868 3,066 3,006

Low 1,170 1,038 1,602 1,692 1,512

Heating

High 2,106 2,778 2,952 2,892

Med. 1,806 1,770 2,778 2,952 2,892

Low 1,452 1,326 2,124 2,226 2,280

Sound pressure level*

Cooling

dB(A)

47 49 52 55

Heating 48 50 52 55

Sound power level

58 62 65 65 69

Fan
speed

Cooling

High

rpm

740 810 840 950

Med. 740 810 840

Low 740 490 480 450

Heating

High 860 900 810

Med. 740 770 810

Low 600 610 620 650

Fan speed regulator 3

Refrigerant lling capacity

(R410A)

kg 0.80 1.15 1.60 1.60 1.80

OCH603

55

Specifications and rating conditions of main electric parts

Model

Item

SUZ-KA25VA5 SUZ-KA35VA5 SUZ-KA50VA5 SUZ-KA60VA5 SUZ-KA71VA5

Smoothing
capacitor

(C61) — — 620 μF 420 V — —
(C62, C63) 620 μF 420 V 620 μF 420 V 620 μF420 V — —
(CB1, 2, 3) — — — 560 μF 450 V 560 μF 350 V

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

Fuse

(F61) T20 A L250 V T20 A L250 V T20 A L250 V — —
(F62) — — — T20A L250V T20A L250V

(F701, F801, F901)

T3.15 A L250 V T3.15 A L250 V T3.15 A L250 V — —

(IC700) 15 A 600 V 15 A 600 V 20 A 600 V — —

Inteligent power
module

(IPM) — — — 20 A 600 V

(IC932) 8 A 600 V 8 A 600 V 8 A 600 V 5 A 600 V 5 A 600 V

Power factor
controller

(PFC) — — — 20A 600V 20A 600V

(IC820) 20 A 600 V 20 A 600 V 20 A 600 V — —

Expansion valve
coil

(LEV) 12 V DC

Reactor

(L61) 18 mH 23 mH 23 mH — —

(L) — — — 340 μH 20 A 340 μH 20 A

Current-Limiting
PTC thermistor

(PTC64, PTC65) 33Ω

Terminal block

(TB1, TB2) — — — 3P 3P

(TB) 5P 5P 5P — —

Relay

(X63) 3 A 250 V 3 A 250 V 3 A 250 V — —

(X64) 20 A 250 V

(X601) — — — 3 A 250 V 3 A 250 V
(X602) — — — 3 A 250 V 3 A 250 V

R.V. coil (21S4) 220–240 V AC

OCH603

6

NOISE CRITERIA CURVES

4

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

COOLING

FUNCTION

SPL(dB(A))

LINE

High
Med.

FAN SPEED

HEATING

47
48

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

NC-10

SUZ-KA25VA5.TH
SUZ-KA25VA5.TH-ET

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

COOLING

FUNCTION

SPL(dB(A))

LINE

FAN SPEED

HEATING

49
50

High
Med.

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

NC-10

SUZ-KA35VA5.TH
SUZ-KA35VA5.TH-ET

COOLING

FUNCTION

SPL(dB(A)) LINE

High

FAN SPEED

HEATING

52
52

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

NC-10

SUZ-KA50VA5.TH
SUZ-KA50VA5.TH-ET

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

OUTDOOR UNIT

MICROPHONE

1 m

SUZ-KA60VA5.TH SUZ-KA71VA5.TH
SUZ-KA60VA5.TH-ET SUZ-KA71VA5.TH-ET

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

COOLING

FUNCTION

SPL(dB(A)) LINE

High

FAN SPEED

HEATING

55

55

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

NC-10

OCH603

7

5

OUTLINES AND DIMENSIONS

10

69

800

302.5
500 Bolt pitch for installation

150

22.3

Handle

550

280

164.5

99.5

170.5

23

Service panel

Service port

285

344.5

44

400

Air in

Air out

Air in

17.5

Bolt pitch for

installation

304~325

40

Liquid refrigerant pipe joint
Refrigerant pipe (flared) [6.35

Gas refrigerant pipe joint
Refrigerant pipe (flared) [9.52

43-

35-

2-Oval holes 10×21

REQUIRED SPACE

Basically, leave this space open.
Only if front and both sides are open,
leave 100 mm at minimum.

350mm or more

200mm or more

100mm or more

100mm or more

200 mm or more.
Leave any two sides among
right, left or rear open.

Drain hole [42

Unit: mm

SUZ-KA25V A5.TH SUZ-KA35V A5.TH
SUZ-KA25VA5.TH-ET SUZ-KA35VA5.TH-ET

OCH603

8

417.5

40

42

Drain hole

175

500

330

50

Air in

Air out

2-Oval holes 10 21

840

109

81

880

452

Service panel

99.5

164.5
195

35

44

Liquid refrigerant
pipe joint
Refrigerant pipe
(flared)

Ø 6.35...(SUZ-KA50/60VA5)
Ø 9.52...(SUZ-KA71VA5)

Gas refrigerant
pipe joint
Refrigerant pipe
(flared)

Ø 12.7...(SUZ-KA50VA5)
Ø 15.88...(SUZ-KA60/71VA5)

350 mm or more

100 mm or more

REQUIRED SPACE

Basically, leave this space open.
Only if front and both sides are open,
leave 500 mm at minimum.

100mm or more

500 mm or more.
Leave any two sides among
right, left or rear open.

Air in

Bolt pitch for

installation

360

Unit: mm

SUZ-KA50V A5.TH SUZ-KA60V A5.TH SUZ-KA71VA5.TH
SUZ-KA50VA5.TH-ET SUZ-KA60VA5.TH-ET SUZ-KA71VA5.TH-ET

OCH603

99

6

WIRING DIAGRAM

SUZ-KA25V A5.TH SUZ-KA35V A5.TH
SUZ-KA25VA5.TH-ET SUZ-KA35VA5.TH-ET

OCH603

10

SUZ-KA50VA5.TH
SUZ-KA50VA5.TH-ET

OCH603

11

SUZ-KA60VA5.TH SUZ-KA71VA5.TH
SUZ-KA60VA5.TH-ET SUZ-KA71VA5.TH-ET

OCH603

12

REFRIGERANT SYSTEM DIAGRAM

7

Unit: mm

SUZ-KA25VA5.TH
SUZ-KA25VA5.TH-ET

Unit: mm

SUZ-KA35VA5.TH
SUZ-KA35VA5.TH-ET

Flared connection

Defrost
thermistor
RT61

Discharge
temperature
thermistor
RT62

Flared connection

Stop valve
(with strainer)

Stop valve
(with service port)

Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe ø9.52
(with heat insulator)

Refrigerant pipe ø6.35
(with heat insulator)

R.V. coil
heating ON
cooling OFF

Strainer
#100

Ambient
temperature
thermistor
RT65

Muffler

Capillary tube
ø3.0×ø2.0×240

Outdoor heat
exchanger
temperature
thermistor
RT68

Muffler

Outdoor
heat
exchanger

LEV

Outdoor
heat
exchanger

Flared connection

Defrost
thermistor
RT61

Discharge
temperature
thermistor
RT62

Flared connection

Stop valve
(with strainer)

Stop valve
(with service port)

Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe ø9.52
(with heat insulator)

Refrigerant pipe ø6.35
(with heat insulator)

R.V. coil
heating ON
cooling OFF

Strainer
#100

Capillary tube
ø3.0×ø1.8×600(×2)

LEV

Ambient
temperature
thermistor

Muffler

Capillary tube
ø3.0×ø2.0×240

Outdoor heat
exchanger
temperature
thermistor

Muffler

RT65

RT68

OCH603

1313

Unit: mm

Unit: mm

SUZ-KA50VA5.TH
SUZ-KA50VA5.TH-ET

SUZ-KA60VA5.TH
SUZ-KA60VA5.TH-ET

Outdoor
heat
exchanger

Flared connection

Defrost
thermistor
RT61

Discharge
temperature
thermistor
RT62

Flared connection

Stop valve

Stop valve
(with service port)

Capillary tube

ø

4.0

×

ø

2.4×100
Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe

ø

12.7 (SUZ-KA50VA4)

(with heat insulator)

Refrigerant pipe ø6.35
(with heat insulator)

LEV

R.V. coil
heating ON
cooling OFF

Muffler

Strainer

#100

Outdoor heat
exchanger
temperature
thermistor
RT68

Ambient
temperature
thermistor
RT65

Strainer

#100

Strainer

#100

Muffler

ø

15.88 (SUZ-KA60VA4)

Outdoor
heat
exchanger

Flared connection

Defrost
thermistor
RT61

Discharge
temperature
thermistor
RT62

Flared connection

Stop valve

Stop valve
(with service port)

Capillary tube

ø

4.0

×

ø

2.4×100
Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe

ø

15.88

(with heat insulator)

Refrigerant pipe ø6.35
(with heat insulator)

LEV

R.V. coil
heating ON
cooling OFF

Muffler

Strainer

#100

Outdoor heat
exchanger
temperature
thermistor
RT68

Ambient
temperature
thermistor
RT65

Strainer

#100

OCH603

14

Unit: mm

SUZ-KA71VA5.TH
SUZ-KA71VA5.TH-ET

Outdoor
heat
exchanger

Flared connection

Defrost
thermistor
RT61

Discharge
temperature
thermistor
RT62

Flared connection

Stop valve

Stop valve
(with service port)

Capillary tube

ø

4.0

×

ø

2.4×100
Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe
(with heat insulator)

ø

15.88

Refrigerant pipe
(with heat insulator)

LEV

R.V. coil
heating ON
cooling OFF

Muffler

#100

Strainer

#100

Outdoor heat
exchanger
temperature
thermistor
RT68

Ambient
temperature
thermistor
RT65

Strainer

#100

ø

9.52

OCH603