Hitachi RAC-18WPD User manual

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

ROOM AIR CONDITIONER

OUTDOOR UNIT

SERVICE MANUAL

REFER TO THE FOUNDATION MANUAL

TECHNICAL INFORMATION

SPECIFICATIONS

CONTENTS

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

CONSTRUCTION AND DIMENSIONAL DIAGRAM ---------------------- 9

MAIN PARTS COMPONENT --------------------------------------------------- 11

WIRING DIAGRAM ---------------------------------------------------------------- 13

After installation

BLOCK DIAGRAM ----------------------------------------------------------------- 16

REFRIGERATING CYCLE DIAGRAM --------------------------------------- 17

DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 20

SERVICE CALL Q & A ---------------------------------------------------------- 37

TROUBLE SHOOTING ------------------------------------------------------------41

OUTDOOR UNIT

RAC-4 2 WPD

RAC-1 8 WPD

PROCEDURE FOR DISASSEMBLY AND REASSEMBLY-------------19

PARTS LIST AND DIAGRAM --------------------------------------------------56

RAC-18WPD

RAC-25WPD

RAC-35WPD

RAC-42WPD

RAC-50WPD

NO.0109E

RAC-2 5WPD

RAC-35WPD RAC-50WPD

Johnson Controls-Hitachi Air Conditioning Wuhu Co., Ltd.

JCH-WH

OUTDOOR UNITOUTDOOR UNIT OUTDOOR UNIT

RAC-25W RAC-42W

(KW)

(B.T.U./h)

(KW)

(B.T.U./h)

W750(+65) 792(+85)

H548 600

D288(+27.5) 299(+47)

MODEL

POWER SOURCE

TOTAL INPUT (W

TOTAL AMPERES (A)

CAPACITY

COOLING

HEATING

TOTAL INPUT (W

TOTAL AMPERES (A)

CAPACITY

DIMENSIONS

(mm)

1,120 (300 1,700)

32.5

NET WEIGHT

TYPE DC INVERTER

1 PHASE,50H z ,220-230V

5.10-4.88

4.20 (1.70 5.00)

14,330 (5,800 17,060)

18,430 (5,800 20,470)

5.99-5.73

1,317 (500 2,100)

5.40 (1.70 6.00)

PDRAC-18W

750(+65)

548

288(+27.5)

419 (250 1,010)

32.5

1 PHASE,50H z ,220-230V

2.46-2.35

519 (250 970)

2.93-2.81

8,530 (3,070 10,920)

2.00 (0.90 2.5)

6,820 (3,070 8,530)

2.50 (0.90 3.20)

733 (250 1500)

3.87-3.71

11,600 (3,070 15,010)

8,530 (3,070 10,580)

3.40 (0.90 4.40)

PD RAC-35W

750(+65)

548

288(+27.5)

941 (250 1,460)

32.5

1 PHASE,50H z ,220-230V

4.81-4.60

1,000 (250 1,700)

5.11-4.89

14,330 (3,070 17,060)

3.50 (0.90 4.00)

11,940 (3,070 13,650)

4.20 (0.90 5.00)

PD PD

1 PHASE,50H z ,220-230V

549 (250 1,290)

3.08-2.95

2.50 (0.90 3.10)

OUTDOOR UNIT OUTDOOR UNIT

RAC-50W

792(+85)

600

299(+47)

1,471 (300 2,100)

6.69-6.40

5.00 (1.90 5.20)

17,060 (6,480 17,740)

20,470 (7,510 24,910)

7.09-6.78

1,558 (500 2,750)

6.00 (2.20 7.30)

1 PHASE,50H z ,220-230V

FOR SERVICE PERSONNEL ONLY

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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 IC40 1TH1 , 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 break er 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

YES(IC)

WITHOUT REFRIGERANT BECAUSE

COUPLING IS FLARE TYPE.

UNIT

PIPES

(MAX. 20m)

1050g

(MIN. 3m)

47W (DC120~380V)

15A, 2A, 3A, 3.15A 25A, 2A, 3A, 3.15A

YES

REFRIGERANT CHARGING

VOLUME

(Refrigerant R32)

870g

HF161F

T R10471,ERZVA9V431V

RAC-18/25/35WPD RAC-42/50WPD

GSD088SKQA6JK6

G TD130UKQ A8JT6

Figure showing the installation of Outdoor unit

MODEL

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)

above 100mm

above 300mm

above 50mm

give clearance

as wide as

possible

above

200mm

above 50 mm when

installed on the

ceiling of balcony

above 200mm

Maximum pipe length 20m

Minimum pipe length m3

RAC-1 8 WPD

RAC-2 5WPD

RAC-35WPD

Figure showing the installation of Outdoor unit

MODEL RAC-4 2 WPD

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)

above 100mm

above 00mm

above 50mm

give clearance

as wide as

possible

above

200mm

above 50 mm when

installed on the

ceiling of balcony

above 200mm

Maximum pipe length 20m

Minimum pipe length m3

RAC-50WPD

CONSTRUCTION AND DIMENSIONAL DIAGRAM

OUTDOOR UNIT

Handle

Air Suction grill

Air outlet

Handle

Rear side

Holes for anchor bolt

(2 – ø12 x 6 slots for ø8.0 bolt)

(for 2 – ø8.0 bolt)

Notch for anchor bolt

Fixing hole

Drain hole

than

More than

100

More than

200

than

300

Service space

than

200

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.ih

MODEL RAC-18/25/35WPD

Unit : mm

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.ih

MODEL RAC-4 2/50WPD

than

200

More than

300

600

345

299

202

163.5

589

792

877

190

147

(11)

Drain hole

This manual suits for next models

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