General AOH20USS, ASH12UMBD, AOH20USBV2, ASH7UMBD, AOH20USU Service Manual

MULTI AIR CONDITIONER

WALL MOUNTED CASSETTE

type

Models

Indoor unit Outdoor unit

ASH12UMBD

AOH20USBV2

ASH7UMBD

AUH12UMAB

AOH20USBV2

ASH7UMBD

CONTENTS

SPECIFICATIONS OUTLINE AND DIMENSIONS REFRIGERANT SYSTEM DIAGRAM CIRCUIT DIAGRAM INDOOR PCB CIRCUIT DIAGRAM ERROR CONTENTS DISASSEMBLY ILLUSTRATION PARTS LIST STANDARD ACCESSORIES

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11 13 24 27

1 3 6

SPECIFICATIONS

ELECTRICAL DATA

TYPE

INDOOR UNIT

OUTDOOR UNIT

COOLING CAPACITY

HEATING CAPACITY

POWER SOURCE

FREQUENCY

RUNNING CURRENT

INPUT WATTS

E.E.R.

MOISTURE REMOVAL

AIR CIRCULATION-High

COOLING

HEATING

COOLING

HEATING

COOLING

HEATING

ASH12UMBD

3.50 kW

4.10 kW

5.8 A

6.1 A

1.30 kW

1.38 kW

2.69 kW/kW

2.97 kW/kW

1.3 L/hr

520 m3/hr

COOL & HEAT

ASH7UMBD

AOH20USBV2

2.20 kW

2.55 kW

230 V

50 Hz

4.1 A

4.3 A

0.86 kW

0.95 kW

2.56 kW/kW

2.68 kW/kW

0.8 L/hr

420 m3/hr

AUH12UMAB

3.50 kW

4.10 kW

5.8 A

6.1 A

1.30 kW

1.38 kW

2.69 kW/kW

2.97 kW/kW

1.3 L/hr

550 m3/hr

ELECTRICAL DATA (Combination)

TYPE

INDOOR UNIT

OUTDOOR UNIT

COOLING CAPACITY

HEATING CAPACITY

POWER SOURCE

FREQUENCY

COOLING

RUNNING CURRENT

HEATING

COOLING

INPUT WATTS

HEATING

COOLING

E.E.R.

HEATING

MOISTURE REMOVAL

AIR CIRCULATION-High

ASH12UMBD + ASH7UMBD

1.3 + 0.8 L/hr

520 + 420 m3/hr

5.70 kW

6.70 kW

9.2 A

9.7 A

2.03 kW

2.15 kW

2.81 kW/kW

3.12 kW/kW

COOL & HEAT

AUH12UMAB + ASH7UMBD

AOH20USBV2

5.70 kW

6.70 kW

230 V

50 Hz

9.2 A

9.7 A

2.03 kW

2.15 kW

2.81 kW/kW

3.12 kW/kW

1.3 + 0.8 L/hr

550 + 420 m3/hr

12006.03.01

SPECIFICATIONS

INDOOR UNIT

MODEL NAME

FAN MOTOR ( cool / heat )

DIMENSIONS

WEIGHT

NOISE LEVEL ( cool / heat )

OUTDOOR UNIT

MODEL NAME

HIGH-SPEED

MED-SPEED

LOW-SPEED

QUIET

H x W x D

GROSS / NET

HIGH-SPEED

MED-SPEED

LOW-SPEED

QUIET

ASH12UMBD

1,310 r.p.m. / 1,310 r.p.m.

1,260 r.p.m. / 1,180 r.p.m.

1,190 r.p.m. / 1,030 r.p.m.

1,100 r.p.m. / 970 r.p.m.

257 x 808 x 187 mm

10 kg / 8 kg

38 dB / 38 dB

37 dB / 35 dB

35 dB / 31 dB

33 dB / 29 dB

AOH20USBV2

ASH7UMBD

1,250 r.p.m. / 1,270 r.p.m.

1,140 r.p.m. / 1,140 r.p.m.

1,070 r.p.m. / 1,030 r.p.m.

1,000 r.p.m. / 970 r.p.m.

257 x 808 x 187 mm

10 kg / 8 kg

36 dB / 36 dB

32 dB / 32 dB

31 dB / 30 dB

29 dB / 28 dB

AUY12UMAB

760 r.p.m. / 760 r.p.m.

690 r.p.m. / 690 r.p.m.

610 r.p.m. / 610 r.p.m.

-----

235 x 580 x 580 + 70 mm

23 kg / 18 kg

42 dB / 43 dB

39 dB / 40 dB

36 dB / 37 dB

-----

COMPRESSOR TYPE

COMPRESSOR DISCRIMINATION

REFRIGERANT

ADDITIONAL CHARGE

CHARGELESS PIPE LENGTH

MAXIMUM PIPE LENGTH

POWER SOURCE

FAN MOTOR

DIMENSIONS

WEIGHT

NOISE LEVEL ( cool / heat )

R410A

H x W x D

GROSS / NET

Hermetic type, Permanent split condenser,

2 pole, Single phase, Induction motor, Rotary

Comp A : 802 354 35B, Comp B : 802 100 65B

Compressor A : 900 g, Compressor B : 750 g

Comp A : 10 g/m, Comp B : 10 g/m

Comp A : 7.5m, Comp B : 7.5 m

Comp A : 15 m, Comp B : 15 m

230V - 50Hz

780 r.p.m.

700 x 900 x 330 mm

73 kg / 66 kg

52 dB / 53 dB

22006.03.15

OUTLINE AND DIMENSIONS

INDOOR UNIT (Wall mounted type) Models : ASH12UMBD, ASH7UMBD (Unit : mm)

808

257

187

32006.03.01

INDOOR UNIT (Cassette type) Model : AUH12UMAB (Unit : mm)

650

20

35

440

650

580

235

580 66

250

( 650) (Grille measurement)

650

(Hanging bolt position)

400

60

131

606

440

(Hanging bolt position)

66

47

111

46

86

600

(Ceiling opening measurement)

Drain pipe (I.D. 32)

250

54

42006.03.01

OUTDOOR UNIT Model : AOH20USBV2 (Unit : mm)

40900

33031 12

700

21

9

400

650

Air Flow

370

52006.03.01

REFRIGERANT SYSTEM DIAGRAM

COOL

HEAT

THERMISTOR-A (DISCHARGE-PIPE)

THERMISTOR (OUTDOOR TEMP.)

4-WAY

VALVE

S C

E D

COMPRESSOR-A

THERMISTOR-A (CONDENSER)

CAPILLARY

TUBE

U N I T A

CAPILLARY

TUBE

MUFFLER

CONDENSER

4-WAY

VALVE

S C

E D

THERMISTOR-B (CONDENSER)

CAPILLARY

TUBE

U N I T B

CAPILLARY

TUBE

STRAINER

THERMISTOR-B (DISCHARGE-PIPE)

COMPRESSOR-B

MUFFLER

2-WAY

3-WAY

VALVE

3-WAY

VALVE

OUTDOOR UNIT

REFRIGERANT PIPE

INDOOR UNIT A

9.52mm(3/8")

THERMISTOR

EVAPOLATOR

REFRIGERANT PIPE

6.35mm(1/4")

( PIPE TEMP. )

THERMISTOR

( ROOM TEMP. )

REFRIGERANT PIPE

6.35mm(1/4")

THERMISTOR

( PIPE TEMP. )

EVAPOLATOR

THERMISTOR

( ROOM TEMP. )

REFRIGERANT PIPE

9.52mm(3/8")

INDOOR UNIT B

62006.02.17

CIRCUIT DIAGRAM

Models : ASH12UMBD, ASH7UMBD / AOH20USBV2

INDOOR UNIT

Wall Mounted type

(ASH12UMBD)

Wall Mounted type

(ASH7UMBD)

CN201

6 5 4 3 2

BOARD DISPLAY

1

RED

WHITE

F M

YELLOW

BLACK

PURPLE

RED

GRAY

THERMAL FUSE

THERMAL

WHITE WHITE WHITE WHITE WHITE RED

BLACK

WHITE

GREEN

PURPLE

THERMAL FUSE

GRAY

103

FAN MOTOR

RED

BLACK BLACK

GRAY GRAY

THERMISTOR ( ROOM TEMP. )

TEST

1 2 3 4 5

CN1

1

CN3CN2

2

1 2

6

5

4

CN4CN8

3

2

1

1 2 3

5 4 3 2 1

3 2 1

TRANSFORMER

1

CONTROL BOARD

2 3

CN6

1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

WHITE

CN105

CN101CN102CN104CN103

W106

W105

POWER SUPPLY BOARD

W104

W103W102

WHITE

1 2 3

(N)

WHITE

BLUE

1 2 3 4 5 6 7 8

5 4 3 2 1

W101

3 2 1

212

BLACK

1

H.A. OUT

CN10CN7

2

1

H.A. IN

3

5

4

3

CN5

2

1

WHITE

FAN MOTOR CAPACITOR

ORANGE

RED

THERMISTOR ( PIPE TEMP. )

BLUE PINK YELLOW ORANGE RED

STEPPING MOTOR

WHITE

ORANGE

BLACK BLACK

GRAY GRAY

CN201

WHITE

6

WHITE

5

M

UNIT BUNIT A

WHITE

4

WHITE

3

WHITE

2

RED

BOARD DISPLAY

1

RED

WHITE

BLACK

F M

WHITE

YELLOW

BLACK

GREEN

PURPLE

THERMAL FUSE

RED

GRAY

THERMAL FUSE

103

THERMAL

4

3

2

1

1 2 3

1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

FAN MOTOR

5 4 3 2 1

3 2 1

TRANSFORMER

RED

1

THERMISTOR ( ROOM TEMP. )

TEST

1 2 3 4 5

CN1

1

CN3CN2

2

1 2

CN4CN8

1

CONTROL BOARD

2 3

CN6

WHITE

CN105

CN101CN102CN104CN103

W106

W105

POWER SUPPLY BOARD

W104

W103W102

WHITE

1 2 3

(N)

WHITE

BLUE

5 4 3 2 1

W101

3 2 1

212

BLACK

1

CN10CN7

2

1 3

5

4

3

CN5

2

1

WHITE

FAN MOTOR CAPACITOR

H.A. OUT

H.A. IN

ORANGE

RED

THERMISTOR ( PIPE TEMP. )

BLUE PINK YELLOW ORANGE RED

STEPPING MOTOR

WHITE

ORANGE

M

OUTDOOR UNIT

COMP. CAPACITOR A

WHITE

RED

COMP. CAPACITOR B

S

WHITE

R

COMP.A

C

BLACK

RELAY

OVERLOAD

PROTECTOR

A

BLACK

WHITE

BLACK

WHITE

RED

WHITE

BLACK

1 32(N) 1 32(N) NL

UNIT A

UNIT B POWER

BLUE

PINK

R

OVERLOAD

PROTECTOR

BLACK

FAN CAPACITOR

RED

S

C

BLACK

RELAY B

YELLOW

BLACK

BLACK WHITE

TERMINAL

YELLOW

COMP.B

W 4

W 3

W 2

W 1

1 2

BLACK BLACK

CN1

CN2

WHITE WHITE

CN9

E 1

1 2 3 4

1

CN4 CN3

2

1

CN5

2

4 3 2 1

1

GREEN

2 3

YELLOW

4 5

BROWN

6 7

PINK

8 9

BLACK

10

GREEN

BLACK WHITE RED BLUE

BLACK BLACK

4WV

BLACK BLACK

4WV

PRINTED CIRCUIT BOARD

CN10

FUSE F1 T6 . 3A250V

FAN MOTOR

FM

SOLENOID COIL A

SOLENOID COIL B

THERMISTOR A (DIS.TEMP.)

THERMISTOR B (DIS.TEMP.)

THERMISTOR A (COND.TEMP.)

THERMISTOR B (COND.TEMP.)

THERMISTOR (OUT.TEMP.)

2006.03.01

7

Models : AUH12UMAB, ASH7UMBD / AOH20USBV2

Cassette type

(AUH12UMAB)

GREEN

WHITE

1

CN 4

2

WHITE

BLACK

2

BLACK

CN 6

1

1 2 3 4 5 6

PURPLE

BLUE

1 2 5 3 6 4

WHITE

RED

FM

FAN MOTOR

GREEN/YELLOW

TERMINAL

2 1

BLACK

EARTH

FAN MOTOR CAPACITOR

YELLOW

DRAIN PUMP MOTOR

RED

WHITE

3

(N)

M

BLACK

12

EARTH

Use T3.15A - 250V Fuse on F101

GRAY

8

PURPLE

7

BLUE

6

WHITE

5

YELLOW

4

ORANGE

3

RED

2

BROWN

DISPLAY BOARD

1

CN 201

FLOAT SWITCH

BLACK

3

BLACK

1

BLACK

THERMISTOR (ROOM TEMP.)

THERMISTOR (PIPE TEMP.)

GRAY

FILTER BOARD

8 7 6 5 4 3 2 1

3 1

2 1

5 34 2 1

WHITE

5 34 2 1

STEPPING MOTOR

N

L

WHITE

BLACK

2 3

1

CN 1

CN 13CN 15

CONTROL BOARD

CN 8CN 7

CN 10 CN 5

YELLOW

ORANGE

RED

BROWN

M

EARTH

UNIT A

UNIT B

Wall Mounted type

(ASH7UMBD)

BLACK BLACK

THERMISTOR ( ROOM TEMP. )

TEST

1 2 3 4 5

CN1

1

CN3CN2

2

1 2

6 5 4

CN4CN8

3 2 1

1

CONTROL BOARD

2 3

CN6

1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

WHITE

BLUE

1 2 3 4 5 6 7 8

CN105

5 4 3

CN101CN102CN104CN103

2 1

W101

W106

3 2 1

W105

POWER SUPPLY BOARD

212

W104

212

W103W102

BLACK

WHITE

1 2 3

(N)

CN201

6 5 4 3 2

BOARD DISPLAY

1

RED

WHITE

F M

YELLOW

BLACK

PURPLE

RED

GRAY

THERMAL FUSE

THERMAL

WHITE WHITE WHITE WHITE WHITE RED

BLACK

WHITE

GREEN

PURPLE

THERMAL FUSE

GRAY

103

FAN MOTOR

RED

GRAY GRAY

6 5 4 3 2 1

1 2 3

5 4 3 2 1

3 2 1

TRANSFORMER

1

CN10CN7

2

1 3

5 4 3

CN5

2 1

WHITE

THERMISTOR ( PIPE TEMP. )

H.A. OUT

H.A. IN

BLUE

5

PINK

4

YELLOW

3

ORANGE

2

RED

1

STEPPING MOTOR

WHITE

FAN MOTOR CAPACITOR

ORANGE

RED

OUTDOOR UNITINDOOR UNIT

FAN MOTOR

FM

SOLENOID COIL A

SOLENOID COIL B

THERMISTOR A (DIS.TEMP.)

THERMISTOR B (DIS.TEMP.)

THERMISTOR A (COND.TEMP.)

THERMISTOR B (COND.TEMP.)

THERMISTOR (OUT.TEMP.)

FAN COMP. CAPACITOR A

WHITE

RED

COMP. CAPACITOR B

S

WHITE

M

R

COMP.A

BLUE

C

BLACK

RELAY

OVERLOAD

PROTECTOR

A

BLACK

OVERLOAD

BLACK

RED

S

R

BLACK

PROTECTOR

YELLOW

CAPACITOR

YELLOW

COMP.B

C

RELAY B

1

CN2

2

WHITE WHITE

BLACK BLACK

CN4 CN3

CN5

1 2 3 4

1 2

BLACK BLACK

4 3 2 1

BLACK WHITE RED BLUE

4WV

PRINTED CIRCUIT BOARD

CN10

FUSE F1 T6 . 3A250V

WHITE

W 4

BLACK

WHITE

BLACK

PINK

RED

BLACK WHITE

1 2

W 3

W 2

W 1

1

GREEN

2 3

YELLOW

4 5

CN9

BROWN

6 7

PINK

8 9

BLACK

10

CN1

E 1

1 32(N) 1 32(N) NL

UNIT A

UNIT B POWER

TERMINAL

GREEN

2006.03.01

8