Hitachi RAC-25WPB User manual

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

ROOM AIR CONDITIONER

INDOOR UNIT + OUTDOOR UNIT

SERVICE MANUAL

REFER TO THE FOUNDATION MANUAL

TECHNICAL INFORMATION

FOR SERVICE PERSONNEL ONLY

SPECIFICATIONS

CONTENTS

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

HOW TO USE ----------------------------------------------------------------------10

CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 43

MAIN PARTS COMPONENT --------------------------------------------------- 48

WIRING DIAGRAM ---------------------------------------------------------------- 50

CIRCUIT DIAGRAM --------------------------------------------------------------- 52

After installation

BLOCK DIAGRAM ----------------------------------------------------------------- 55

BASIC MODE ----------------------------------------------------------------------- 56

REFRIGERATING CYCLE DIAGRAM --------------------------------------- 67

DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 73

SERVICE CALL Q & A ---------------------------------------------------------- 98

TROUBLE SHOOTING -----------------------------------------------------------102

PARTS LIST AND DIAGRAM --------------------------------------------------1

HHAW

RAK-18PPB/RAC-18WPB

RAK-25PPB/RAC-25WPB

RAK-35PPB/RAC-35WPB

RAK-50PPB/RAC-50WPB

INDOOR UNITOUTDOOR UNIT

INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT

RAK-18P RAC-18W RAK-25P RAC-25W RAK-35P RAC-35W RAK-50P RAC-50W

(KW)

(B.T.U./h)

(KW)

(B.T.U./h)

W780 660(+60) 780 660(+60) 900 750(+65) 900 792(+91)

H280 530 280 530 295 548 295 600

D218 278(+35) 218 278(+35) 230 288(+27.5) 230 299(+47)

MODEL

POWER SOURCE

TOTAL INPUT (W

TOTAL AMPERES (A)

CAPACITY

COOLING

HEATING

TOTAL INPUT (W

TOTAL AMPERES (A)

CAPACITY

1,090 (250 1,460)

DIMENSIONS

(mm)

1,560 (500 2,100)

3.12-2.97

2.00 (0.90 2.50)

8,530 (3,070 10,580)

580 (250 970)

2.50 (0.90

27.57.5 27.57.5 3410 10

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 1 PHASE,50HZ,220-230V

550 ( 700 (250

)010 , 1 1,290)

4.56-4.36

3.40 (0.90 4.40)

11,600 (3,070 15,010)

4.87-4.66

1,100 (250 1,700)

5.51-5.27

14,330 (3,070 17,060)

3.75-3.59

2.50 (0.90 3.10)

8,530 (3,070 10,580)

7.30-6.98

3.50 (0.90 4.00) 5.00 (1.90 5.20)

11,940 (3,070 13,650) 17,060 (6,480 17,740)

20,470 (7,510 24,910)

7.93-7.59

1,660 (500 2,750)

4.20 (0.90 5.00) 6.00 (2.20 7.30)

250

Hitachi Household Appliances(Wuhu) Co., Ltd.

PB PB PB PB PB PB PB PB

RAC-18WPB

RAC-25WPB

RAK-18PPB

RAK-25PPB

RAC-50WPB

RAC-35WPB

1 PHASE,50HZ,220-230V

RAK-35PPB

RAK-50PPB

NO.0080E-3

PROCEDURE FOR DISASSEMBLY AND REASSEMBLY-------------70

RAR-5E2

RAR-5E1

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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-18WPB RAC-35 PB

–

YES

YES(IC)

YES

---------- 1050g 1250g

ASD084SFNA7JK1

RAK-18PPB

RAC-25WPB

RAK-25PPB

RAK-35PPB

RAK-50PPB

(MIN. 3m)

47W (DC120~380V)

30W (DC325 V)

950g

RAC- PB50W

5RS132ZBA21

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

YES

450NR, ERZVA431

450NR

YES

Figure showing the installation of lndoor and Outdoor unit

MODEL RAK-18PP /RAC-18WP

B B

RAK-25PP /RAC-25WPB B above

50mm

above 50mm

The indoor piping should be

insulated with the enclosed

insulation pipe. (If the insulator is

insufficient, please use commercial

products.)

•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)

Be sure to

completely

seal any gap

with putty.

2,300 mm or more

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.

Plug

Maximum pipe length 20m

Minimum pipe length 3m

give clear

as wide a

possible

200mm

above 200mm

above 100mm

300mm

above

above 50mm

above

Figure showing the installation of lndoor and Outdoor unit

MODEL RAK-35PP /RAC-35WP

B B

above

50mm

above 50mm

a300mm

b0.45m

must

nbend

The indoor piping should be

insulated with the enclosed

insulation pipe. (If the insulator is

insufficient, please use commercial

products.)

sThe refrigerating machine oil is

easily affected by moisture. Use

caution to prevent water from

entering the cycle.

sThe difference in height between

the indoor and outdoor unit

should be kept below 10m.

sThe 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

Be sure to

completely

seal any gap

with putty.

above 50 mm when

installed on the

ceiling of balcony

above 200mm

2,300 mm or more

Maximum pipe length 20m

Minimum pipe length m3

Plug

Figure showing the installation of lndoor and Outdoor unit

MODEL RAK-50PPB/RAC-50WPB

above

50mm

above 50mm

a 300mm

b 0.45m

must

n bend

The indoor piping should be

insulated with the enclosed

insulation pipe. (If the insulator is

insufficient, please use commercial

products.)

sThe refrigerating machine oil is

easily affected by moisture. Use

caution to prevent water from

entering the cycle.

sThe difference in height between

the indoor and outdoor unit

should be kept below 10m.

sThe 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

Be sure to

completely

seal any gap

with putty.

above 50 mm when

installed on the

ceiling of balcony

above 200mm

2,300 mm or more

Maximum pipe length 20m

Minimum pipe length m3

Plug

ENGLISH

– 1 –

Remote Controller Manual

Remote Controller manual Page 1~27

To obtain the best performance and ensure years of trouble free use, please read this instruction manual completely.

MODEL

RAR-5E2

– 2 –

PREPARATION BEFORE OPERATION

1. Slide the cover to take it off.

2. Install two dry batteries AAA.LR03 (alkaline).

The direction of the batteries should match the

marks in the case.

1. Choose a place from where the signals can reach the unit.

2. Fix the remote controller holder to a wall, a pillar or similar

location with the provided screws.

3. Place the remote controller in the remote controller holder.

Remote controller

Screws

Remote controller holder

ƵTo install the batteries

3. Replace the cover at its original position.

ƵTo fix the remote controller holder to the wall

NOTE

Notes on batteries

ƽWhen replacing the batteries, use batteries of the same

type, and replace both old batteries together.

ƽWhen the system is not used for a long time, take the

batteries out.

ƽThe batteries will last for approximately 1 year. However, if

the remote controller display begins to fade and degradation

of reception performance occurs within a year, replace both

batteries with new size AAA.LR03 (alkaline).

ƽThe attached batteries are provided for the initial use of

the system.

The usable period of the batteries may be short depending

on the manufactured date of the air conditioner.

Notes on the remote controller

ƽNever expose the remote controller to direct sunlight.

ƽDust on the signal transmitter or receiver will reduce the

sensitivity. Wipe off dust with soft cloth.

ƽSignal communication may be disabled if an electronic-

starter-type uorescent lamp (such as inverter-type lamps)

is in the room. Consult the shop if that is the case.

ƽIf the remote controller signals happen to operate another

appliance, move that appliance to somewhere else, or

consult the service shop.

ƽWhen the remote controller is not in use, please close the

slide cover to prevent failure.

This manual suits for next models

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