Hitachi RAC-18WPC Bedienungsanleitung

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

ROOM AIR CONDITIONER

OUTDOOR UNIT

SERVICE MANUAL

REFER TO THE FOUNDATION MANUAL

TECHNICAL INFORMATION

FOR SERVICE PERSONNEL ONLY

SPECIFICATIONS

CONTENTS

SPECIFICATIONS ------------------------------------------------------------------- 6

CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 8

MAIN PARTS COMPONENT --------------------------------------------------- 9

WIRING DIAGRAM ---------------------------------------------------------------- 11

After installation

BLOCK DIAGRAM ----------------------------------------------------------------- 13

REFRIGERATING CYCLE DIAGRAM --------------------------------------- 14

DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 16

SERVICE CALL Q & A ---------------------------------------------------------- 24

TROUBLE SHOOTING ----------------------------------------------------------- 28

PARTS LIST AND DIAGRAM --------------------------------------------------

HHAW

RAC-18WPC

RAC-25WPC

OUTDOOR UNIT

OUTDOOR UNIT OUTDOOR UNIT

RAC-18W RAC-25W

(KW)

(B.T.U./h)

(KW)

(B.T.U./h)

W660(+60) 660(+60)

H530 530

D278(+35) 278(+35)

MODEL

POWER SOURCE

TOTAL INPUT (W

TOTAL AMPERES (A)

CAPACITY

COOLING

HEATING

TOTAL INPUT (W

TOTAL AMPERES (A)

CAPACITY

DIMENSIONS

(mm)

3.12-2.97

2.00 (0.90 2.50)

8,530 (3,070 10,580)

580 (250 970)

2.50 (0.90

27.5 27.5

3.20)

3.49-3.34

11,600 (3,070 15,010)

880 (250 1,250)

NET WEIGHT (Kg)

TYPE DC INVERTER

1 PHASE,50Hz,220-230V 1 PHASE,50Hz,220-230V

550 ( 700 (250

)1,290)

4.56-4.36

3.40 (0.90 4.40)

11,600 (3,070 15,010)

3.75-3.59

2.50 (0.90 3.10)

8,530 (3,070 10,580)

250

PC PC

RAC-18WPC

RAC-25WPC

PROCEDURE FOR DISASSEMBLY AND REASSEMBLY-------------15

0100E

1010

Johnson Controls

Hitachi Air Conditioning Wuhu

Co., Ltd.

 

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

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

 



 

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







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 

















DANGER

WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS

1. Scope

The standards provide for items to be generally observed in carrying and handling semiconductors in

relative manufactures during maintenance and handling thereof. (They apply the same to handling of

abnormal goods such as rejected goods being returned.)

2. Object parts

(1) Microcomputer

(2) Integrated circuits (I.C.)

(3) Field effective transistor (F.E.T.)

(4) P.C. boards or the like to which the parts mentioned in (1) and (2) of this paragraph are equipped.

3. Items to be observed in handling

(1) Use a conductive container for carrying and storing of parts. (Even rejected goods should be handled in

the same way.)

(2) When any part is handled uncovered (in counting, packing and the like), the handling person must

always use himself as a body earth. (Make yourself a body earth by passing one M ohm earth

resistance through a ring or bracelet.)

(3) Be careful not to touch the parts with your clothing when you hold a part even if a body earth is

being taken.

(4) Be sure to place a part on a metal plate with grounding.

(5) Be careful not to fail to turn off power when you repair the printed circuit board. At the same time,

try to repair the printed circuit board on a grounded metal plate.

HITACH I IC401TH 1 ,188UV

Fig. 1 Conductive container

A conductive polyvinyl bag

Conductive sponge

Fig. 2 Body earth

Body earth (Elimik conductive band)

Clip for connection with

a grounding wire

1MΩ

(6) Use a three wire type soldering iron including a grounding wire.

Fig.4 Grounding a solder iron

Use a high insulation mode (100V, 10MΩor higher) when ordinary iron is to be used.

(7) In checking circuits for maintenance, inspection, or some others, be careful not to have the test probes

of the measuring instrument short circuit a load circuit or the like.

Bare copper wire (for body earth)

Metal plate (of Al. stainless steel, etc.)

Working table

Resistor 1MΩ(1/2W)

Earth wire

Staple

Fig.3 Grounding of the working table

soldering iron

Grounding wire

Screw stop at the screwed

part using a rag plate

In quiet or stop operation, slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally,

but this noise is not abnormal for the operation.

2. When it thunders near by, it is recommend to stop the operation and turn off the circuit breaker for safety.

3. In the event of power failure,the room air conditioner will restare automatically in the previously

mode once the power is restored. In the event of power failure during TIMER operation, the room air comditioner

will not start automatically. Re-press ON/OFF button after 3 minutes from when the unit off or power recovery.

4. If the room air conditioner is stopped by adjusting thermostat, or missoperation, and re-start in a moment,

there is occasion that the cooling and heating operation does not start for 3 minutes, it is not abnormal and

this is the result of the operation of IC delay circuit. This IC delay circuit ensures that there is no danger of

blowing fuse or damaging parts even if operation is restarted accidentally.

5. This room air conditioner should not be used at the cooling operation when the outside temperature is

below -10°C (14°F).

6. This room air conditioner (the reverse cycle) should not be used when the outside temperature is below

–15°C (5°F).

If the reverse cycle is used under this condition, the outside heat exchanger is frosted and efficiency falls.

7. When the outside heat exchanger is frosted, the frost is melted by operating the hot gas system, it is not

trouble that at this time fan stops and the vapour may rise from the outside heat exchanger.

CAUTION

selected

SPECIFICATIONS

MODEL

FAN MOTOR

FAN MOTOR CAPACITOR

FAN MOTOR PROTECTOR

COMPRESSOR

COMPRESSOR MOTOR CAPACITOR

OVERLOAD PROTECTOR

OVERHEAT PROTECTOR

FUSE (for MICROPROCESSOR)

POWER RELAY

POWER SWITCH

TEMPORARY SWITCH

SERVICE SWITCH

TRANSFORMER

VARISTOR

NOISE SUPPRESSOR

THERMOSTAT

REMOTE CONTROL SWITCH (LIQUID

CRYSTAL)

YES(INTERNAL)

YES

G4A-1A

YES

YES(IC)

WITHOUT REFRIGERANT BECAUSE

COUPLING IS FLARE TYPE.

UNIT

PIPES

(MAX. 20m)

REFRIGERANT CHARGING

VOLUME

(Refrigerant 410A)

RAC-18WPC

ASD084SFNA7JK1

RAC-25WPC

(MIN. 3m)

47W (DC120~380V)

950g

15A, 2A, 3A, 3.15A

YES

450NR, ERZVA431

Figure showing the installation of lndoor and Outdoor unit

MODEL RAC-18WPC

RAC-25WPC

The refrigerating machine oil is

easily affected by moisture. Use

caution to prevent water from

entering the cycle.

The difference in height between

the indoor and outdoor unit

should be kept below 10m.

The connecting pipe, no matter

big or small, should all be

insulated with insulation pipe and

then wrapped with vinyl tape.

(The insulator will deteriorate if

it is not wrapped with tape).

The connection of insulated drain

hose.

Inner diameter 16mm

Please use insulated drain hose for

the indoor piping (commercial

product)

The clearances of the

unit from top, left, right

and front are specified

in figure below. At least

three of the above sides

must be open air.

Maximum pipe length 20m

Minimum pipe length 3m

give clear

as wide a

possible

200mm

above 200mm

above 100mm

300mm

above

above 50mm

above

CONSTRUCTION AND DIMENSIONAL DIAGRAM

OUTDOOR UNIT

NOTE:

1.For outdoor unit installation , allow at least 2 sides of space around the unit ensure ventilation flue.

2.The connecting pipe , should all the insulated with insulation pipe.

3.Piping length is within 20m.

4.Height d fferent of the piping between the indoor unit and outdoor unit s ould be within 10m.hi

MODEL RAC-18WPC,RAC-25WPC

than

200

Air outlet

530

720

660

500 81

2783560660

More than

Drain hole

300

34 50

317

MAIN PARTS COMPONENT

FAN MOTOR

MAIN ELECTRIC COMPONENTS FOR OUTDOOR UNIT

Fan Motor Specifications

SLEDOMELBACILPPAGNITAREMAN

BLU : BLUE YEL : YELLOW BRN : BROWN WHT : WHITE

GRY : GRAY ORN : ORANGE GRN : GREEN RED : RED

BLK : BLACK PNK : PINK VIO : VIOLET

RAC-18/25WPC

THERMOSTAT (Room temperature Thermistor)

CONNECTION

MODEL

ECRUOSREWOP

TUPTUO

V083-021:CD

W74

WHT(V)

BLK(W)

RED(U)

RAC-18/25WP

REACTOR 15 (mH) 250 m MAX (20 ˚C) C

WHITE

COMPRESSOR

YELLOW

MODEL

COMPRESSOR TYPE

POWER SOURCE

COMPRESSOR MOTOR

Compressor Motor Specifications

CAUTION

When the refrigerating cycle has been operated for a long time with the capillary tubes clogged or crushed

or with too little refrigerant, check the color of the refrigerating machine oil inside the compressor. If the

color has been changed conspicuously, replace the compressor.

(U)

(V)

(W)

WHITE

YELLOW RED

RAC-

ASD084SFNA7JK1

18/25WPC

(U)

(V)

2M= 0.74

2M= 0.88

100 - 240 V

RAC-18/25WPC

RED

(W)

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