Mitsubishi MSZ-A18YV-E1, MSZ-A24YV-E1, MSZ-A26YV-E1 Service Manual

SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Wireless type Models

No. OB345

MSZ-A18YV MSZ-A24YV MSZ-A26YV -

Indication of model name

MSZ-A18YV MSZ-A24YV MSZ-A26YV -

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CONTENTS

1. PART NAMES AND FUNCTIONS······················2

2. SPECIFICATION·················································4

3. NOISE CRITERIA CURVES·······························5

4. OUTLINES AND DIMENSIONS·························6

5. WIRING DIAGRAM ············································7

6. REFRIGERANT SYSTEM DIAGRAM················8

7. SERVICE FUNCTIONS ······································9

8. TROUBLESHOOTING ······································11

9. DISASSEMBLY INSTRUCTIONS ····················19

10. PARTS LIST······················································21

11. OPTIONAL PARTS···········································23

NOTE:

This service manual describes technical data of the indoor unit.

•Refer to the service manual OB346 when MSZ-A18YV - , MSZ-A24YV - or MSZ-A26YV is connected with MUZ-A18YV - , MUZ-A24YV - or MUZ-A26YV - .

•Refer to the service manual OB319 when MSZ-A18YV - , MSZ-A24YV - or MSZ-A26YV is connected with MXZ-A26WV - or MXZ-A32WV - as multi system units.

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E1E1

1

Grille

(When the grille is opened)

Remote controller

Operation section

Display section

Emergency operation switch

Operation indicator lamp

Air inlet

To Breaker Power supply cord

Remote control

receiving section

Air cleaning filter (option) (White bellows type)

Horizontal vane

Vertical vanes

Catechin air filter

Remote control

receiving section

1 2 3 4 5 6 7

Installation plate Installation plate fixing screw 4 o 25 mm Remote controller holder Fixing screw for 3 o 3.5 o 1.6 mm (Black) Battery (AAA) for remote controller Wireless remote controller Felt tape (Used for left or left-rear piping)

1 7 1 2 2 1 1

MSZ-A18YV MSZ-A24YV MSZ-A26YV -

E1 E1 E1

PART NAMES AND FUNCTIONS

INDOOR UNIT

MSZ-A18YV MSZ-A24YV MSZ-A26YV -

E1

ACCESSORIES

Indoor unit

2

REMOTE CONTROLLER

MSZ-A18YV MSZ-A24YV MSZ-A26YV -

E1

Signal transmitting section

Operation display section

OPERATE /STOP

(ON /OFF)button

Open the front lid.

ON/OFF

TOO

WARM

PM

AM

TOO

COOL

TEMPERATURE buttons

Indication of remote controller model is on back.

VANE button

(Horizontal vane button)

OPERATION SELECT button

ECONO COOL button

WIDE VANE button

(Vertical vane button)

RESET button

TOO

ON/OFF

WARM

COOL

DRY

FAN

VANE

WIDE VANE

LONG

RESET CLOCK

I FEEL

HEAT

MODE

ECONO COOL

3

CLOCK

PM

AM

TOO

COOL

STOP

START

HR.

MIN.

FAN SPEED CONTROL button

OFF-TIMER button

ON-TIMER button

HR. button

MIN. button

(TIME SET button)

CLOCK SET button

LONG button

2

Indoor model

Function

Power supply

Air flow

(High/Med. /Low ) Power outlet Running current

✽1

Power input

✽1 Auxiliary heater Power factor

✽1

Fan motor current

✽1 Model Winding resistance(at 20:) Dimensions WOHOD Weight Air direction Sound level(High/Med. /Low ) Fan speed(High/Med. /Low ) Fan speed regulator Thermistor RT11(at 25:) Thermistor RT12(at 25:) Thermistor RT13(at 25:) Remote controller model

K /h

A A W

A(kW)

% A

"

mm

kg

dB

rpm

k" k" k"

MSZ-A18YV -

E1

Single phase

230V, 50Hz

852/690 /498

10

0.30 60 — 87

0.30

RC4V32-AA WHT-BLK 293 BLK-RED 146

1,100O325O258

16

5

43/38 /31

1,120/940 /720

3 10 10 10

KP0A

Cooling

Heating

MSZ-A24YV -

E1

Single phase

230V, 50Hz

10

0.34 69 — 87

0.34

RC4V40-AA WHT-BLK 138.2 BLK-RED 159.0 1,100O325O258

16

5

48/40 /32

3 10 10 10

KP0A

Cooling

1,032/768 /522

1,310/1030 /750

Heating

1,032/786 /522

1,310/1050 /750

Electrical

data

Fan

motor

Special

remarks

Capacity

ww

w

ww

w

ww

w

Indoor model

Function

Power supply

Air flow

(High/Med. /Low ) Power outlet Running current

✽1

Power input

✽1 Auxiliary heater Power factor

✽1

Fan motor current

✽1 Model Winding resistance(at 20:) Dimensions WOHOD Weight Air direction Sound level(High/Med. /Low ) Fan speed(High/Med. /Low ) Fan speed regulator Thermistor RT11(at 25:) Thermistor RT12(at 25:) Thermistor RT13(at 25:) Remote controller model

K /h

A A

W

A(kW)

%

A

"

mm

kg

dB

rpm

k" k" k"

MSZ-A26YV

-

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Single phase

230V, 50Hz

10

0.34 69 — 88

0.34

RC4V40-AA WHT-BLK 138.2 BLK-RED 159.0 1,100O325O258

16

5

48/40 /33

3 10 10 10

KP0A

Cooling

1,032/798 /564

1,310/1,060 /800

Heating

1,032/816 /564

1,310/1,080 /800

Electrical

data

Fan

motor

Special

remarks

Capacity

ww

w

ww

w

SPECIFICATION

•Refer to the service manual OB346 when MSZ-A18YV - , MSZ-A24YV - or MSZ-A26YV - is connected with MUZ-A18YV - , MUZ-A24YV - or MUZ-A26YV - .

E1E1E1

•Refer to the service manual OB319 when MSZ-A18YV - , MSZ-A24YV - or MSZ-A26YV - is connected with MXZ-A26WV - or MXZ-A32WV - as multi system units.

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NOTE: Test conditions are based on ISO 5151.

Cooling : Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C Heating : Indoor Dry-bulb temperature 20°C Wet-bulb temperature 15.5°C

w Reference value ✽1 Measured under rated operating frequency.

Outdoor Dry-bulb temperature 35°C Wet-bulb temperature(24°C) Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C

Indoor-Outdoor piping length 5m

4

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

Test conditions, Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

43

SPL(dB(A)) LINE

High

FAN SPEED

Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5:

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

Specifications and rating conditions of main electric parts

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

Test conditions, Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:

48

SPL(dB(A)) LINE

High

FAN SPEED

Heating : Dry-bulb temperature 20: Wet-bulb temperature 15.5:

INDOORUNIT

WALL

MICROPHONE

0.8m

1m

INDOOR UNIT

Item

Indoor fan capacitor Fuse Vane motor

(MV1/ MV2)

Varistor Solid state relay Terminal block Indoor fan motor thermal fuse

3

MSZ-A18YV -

NOISE CRITERIA CURVES

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Model

(C11)

(F11)

(NR11)

(SR141)

(TB)

MSZ-A18YV -

145:

E1

MSZ-A24YV -

TNR10V511K410

MSZ-A24YV MSZ-A26YV -

2.5+ 440V 250V 3.15A

MP20/MP20

S201DH1N

3P

E1

MSZ-A26YV -

E1

5

4

258

162

19

58

47

7.5

315

255.547

2.5

98

173

98 173414.5 414.5

5

253

791

56

1068

1100

325

Air out

Air in

Insulation [28

Drain hose [16 (Connected part O.D)

Installation plate

Wall hole [75

Wireless remote controller

Installation plate

Indoor unit

{

Liquid line [ 6.35- 0.5m Gas line [ 12-0.43m Insulation [ 50 O.D

[ 32 I.D

{

Liquid line [ 9.52- 0.5m Gas line [ 12-0.43m Insulation [ 50 O.D

[ 32 I.D

for MSZ-A18/A24YV

for MSZ-A26YV

Power supply cord Lead to right 2.0m Lead to left 1.0m

OUTLINES AND DIMENSIONS

MSZ-A18YV MSZ-A24YV MSZ-A26YV -

INDOOR UNIT

E1

Unit: mm

6

5

WIRING DIAGRAM

MSZ-A18YV -

INDOOR UNIT

TO OUTDOOR UNIT CONNECTING

12V

POWER SUPPLY CORD ~/N 230V 50Hz

PE

CIRCUIT BREAKER

SYMBOL

C11 F11

HIC1

MF

NOTES:

INDOOR FAN CAPACITOR FUSE (3.15A) DC/DC CONVERTER INDOOR FAN MOTOR (INNER FUSE)

1.About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing.

2.Use copper conductors only. (For field wiring)

3.Symbols below indicate. : Terminal block

TB

3 N L

BRN BLU

E1

GRN/YLW

NAME

RED BLU BRN

MV2

: Connector

MODEL WIRING DIAGRAM

CN201

3 2 1

TAB12

CN 151

MV2

15

MV1

SYMBOL

MV1 MV2

NR11

RT11

CN

102

DISPLAY P.C. BOARD

VANE MOTOR (HORIZONTAL) VANE MOTOR (VERTICAL) VARISTOR ROOM TEMPERATURE THERMISTOR

CN

101

33

RECEIVER P.C. BOARD

NAME

4

CN112

C11

CN

121

3 2 1

3

1 3 4

HIC1

TRANS

F11

NR11

SR141

CN211

CN

ELECTRONIC CONTROL P.C. BOARD

REMOTE CONTROLLER

111

SYMBOL

RT12 RT13

SR141

INDOOR COIL THERMISTOR (MAIN) INDOOR COIL THERMISTOR (SUB) SOLID STATE RELAY TERMINAL BLOCK

TB

BLK GRY YLW BRN WHT RED

NAME

RT13 RT12

RT11

1 2 3

MF

4 5 6

MSZ-A24YV MSZ-A26YV -

INDOOR UNIT

TO OUTDOOR UNIT CONNECTING

12V

POWER SUPPLY CORD ~/N 230V 50Hz

PE

CIRCUIT BREAKER

SYMBOL

C11

F11

HIC1

MF

MV1

NOTES:

1.About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing.

2.Use copper conductors only. (For field wiring)

3.Symbols below indicate.

3 N L

INDOOR FAN CAPACITOR FUSE (3.15A) DC/DC CONVERTER INDOOR FAN MOTOR (INNER PROTECTOR) VANE MOTOR (HORIZONTAL)

: Terminal block

E1

TB

BRN BLU

RED BLU BRN

GRN/YLW

NAME

: Connector

MV2

MODELS WIRING DIAGRAM

CN201

3 2 1

TAB12

MV1

MV2 NR11 RT11 RT12 RT13

CN

102

CN

101

ELECTRONIC CONTROL P.C. BOARD

33

DISPLAY P.C. BOARD

RECEIVER P.C. BOARD

NAME NAME VANE MOTOR(VERTICAL) VARISTOR ROOM TEMPERATURE THERMIST OR INDOOR COIL THERMISTOR (MAIN) INDOOR COIL THERMISTOR (SUB)

7

CN 151

MV2

15

SYMBOL

HIC1

TRANS

F11

REMOTE CONTROLLER

NR11

SR141

SYMBOL

SR141

TB

4 3 2 1

CN112

C11

CN 121

3

1 3 4

CN211

CN

111

SOLID STATE RELAY TERMINAL BLOCK

RT13 RT12

BLK GRY YLW BRN WHT RED

RT11

MF

6

REFRIGERANT SYSTEM DIAGRAM

MSZ-A18YV -

INDOOR UNIT

Indoor heat exchanger

Indoor coil thermistor RT13(sub)

Room temperature thermistor RT11

E1

Indoor coil thermistor RT12(main)

Distributor

Refrigerant pipe [12.7 (with heat insulator)

Flared connection

MSZ-A24YV -

INDOOR UNIT

Indoor heat exchanger

Indoor coil thermistor RT13(sub)

Room temperature thermistor RT11

E1

Indoor coil thermistor RT12(main)

Distributor

Unit:mm

Refrigerant pipe [15.88 (with heat insulator)

Flared connection

MSZ-A26YV -

INDOOR UNIT

Indoor heat exchanger

Indoor coil thermistor RT13(sub)

Room temperature thermistor RT11

Strainer

E1

Indoor coil thermistor RT12(main)

#50

Refrigerant pipe[6.35 (with heat insulator)

Refrigerant pipe [15.88 (with heat insulator)

Flared connection

Refrigerant pipe [6.35 (with heat insulator)

Refrigerant pipe [9.52 (with heat insulator)

Refrigerant flow in cooling Refrigerant flow in heating

8