Hitachi RAS-07CH1 User manual

(W)

(A)

(kW)

(B.T.U./h)

(W)

(A)

(KW)

(BTU/H)

TOTAL INPUT

TOTAL AMPERES

CAPACITY

TOTAL INPUT

TOTAL AMPERES

CAPACITY

TYPE

MODEL

POWER SOURCE

COOLING

HEATING

DIMENSIONS

NET WEIGHT

NO. 0079E

SERVICE MANUAL

TECHNICAL INFORMATION

FOR SERVICE PERSONNEL ONLY

1 Ø, 220 – 240 V, 50 Hz

680 – 730 870 – 925

3.2 – 3.1 4.1 – 4.1

2.05 – 2.05 2.50 – 2.50

7,000 – 7,000 8,500 – 8,500

630 – 685 860 – 920

3.0 – 2.9 4.0 – 4.0

2.30 – 2.30 2.94 – 3.00

7,850 – 7,850 10,000 – 10,200

785 700 785 700

265 570 265 570

168 210 168 210

726726

SPECIFICATIONS

CONTENTS

SPECIFICATIONS ------------------------------------------------------------------- 5

CONSTRUCTION AND DIMENSIONAL DIAGRAM ----------------------- 6

NAMES AND FUNCTIONS OF EACH PART ------------------------------- 7

MAIN PARTS COMPONENT --------------------------------------------------- 20

WIRING DIAGRAM ----------------------------------------------------------------- 22

WIRING DIAGRAM OF THE PRINTED WIRING BOARD ------------- 24

BASIC MODE ------------------------------------------------------------------------ 31

DESCRIPTION OF MAIN CIRCUIT OPERATION ------------------------ 35

AUTO SWING FUNCTION ------------------------------------------------------ 40

SERVICE CALL Q & A ----------------------------------------------------------- 41

DIAGNOSIS CHART FOR BREAK-DOWN --------------------------------- 46

REFRIGERATION CYCLE ------------------------------------------------------- 56

PARTS LIST AND DIAGRAM --------------------------------------------------- 57

RAS-07CH1

RAS-09CH1

RAC-07CHV1

RAC-09CHV1

RAS-07CH1/RAC-07CHV1

RAS-09CH1/RAC-09CHV1

REFER TO THE FOUNDATION MANUAL

COOLING UNIT

RAS-07CH1

CONDENSING UNIT

RAC-07CHV1

WALL TYPE

(mm)

(kg)

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

ROOM AIR CONDITIONER

COOLING UNIT + CONDENSING UNIT

NOVEMBER 1997

H.A.P.M.

COOLING UNIT

RAS-09CH1

CONDENSING UNIT

RAC-09CHV1

SAFETY DURING REPAIR WORK

1. In order to disassemble and repair

the unit in question, be sure to

disconnect the power cord plug

from the power outlet before starting

the work.

2. If it is necessary to replace any parts, they should be replaced with respective genuine parts for the unit, and

the replacement must be effected in correct manner according to the instructions in the Service Manual of

the unit.

If the contacts of electrical parts

are defective, replace the

electrical parts without trying to

repair them.

3. After completion of repairs, the initial state

should be restored.

4. Lead wires should be connected and laid as

in the initial state.

5. Modification of the unit by user himself should

absolutely be prohibited.

6. Tools and measuring instruments for use in repairs or inspection should be accurately calibrated in advance.

7. In installing the unit having been repaired, be careful to prevent the occurence of any accident such as

electrical shock, leak of current, or bodily injury due to the drop of any part.

8. To check the insulation of the unit, measure the insulation resistance between the power cord plug and

grounding terminal of the unit. The insulation resistance should be 1M or more as measured by a 500V

DC megger.

9. The initial location of installation such as window, floor or the other should be checked for being and safe

enough to support the repaired unit again.

If it is found not so strong and safe, the unit should be installed at the initial location reinforced or at a new

location.

10. Any inflammable thing should never

be placed about the location of

installation.

11. Check the grounding to see whether

it is proper or not, and if it is found

improper, connect the grounding

terminal to the earth.

– 1 –

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

manufacturers during maintenance and handling thereof. (They apply the same to handling of abnormal goods

such as rejected goods being returned).

2. Object parts

(1) Micro computer

(2) Integrated circuits (IC)

(3) Field-effect transistors (FET)

(4) P.C. boards or the like on 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).

Fig. 1. Conductive Container

(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.

Fig. 2. Body Earth

Body earth

(Elimik conductive band)

Clip for connection with a

grounding wire

A conductive polyvinyl bag IC

Conductive sponge

– 2 –

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

Bare copper wire (for body earth)

Working

table

Resistor of 1 M (1/2W)

Earth wire

Fig. 3. Grounding of the working table

Screw stop at the screwed

part using a rag plate

Soldering iron

Grounding

wire

Fig. 4. Grounding a soldering iron

Use a high insulation mode (100V, 10M or 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 shortcircuit a load circuit or the like.

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

Staple

– 3 –

– 4 –

1. In quiet operation or stopping the running, 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 to disconnect the power cord plug from

the power outlet for safety.

3. If the room air conditioner is stopped by setting the temperature or mis-operation, and then re-started in a

moment, cooling 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.

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

20°C.

5. When the operation knob is set to “COOL” from another position, IC delay circuit functions and stops the

compressor for the first 3 minutes, which is not an abnormal phenomenon.

CAUTION

RAC-09CHV1

20 W

1.5 µF, 400 V

YES (INTERNAL)

G533QB9Z

30 µF, 400 V

YES

3.15A

G4A

YES

450NR

MODEL

FAN MOTOR

FAN MOTOR CAPACITOR

FAN MOTOR PROTECTOR

COMPRESSOR

COMPRESSOR MOTOR CAPACITOR

OVERLOAD PROTECTOR

OVERHEAT PROTECTOR

FUSE (for MICRO COMPUTER)

POWER RELAY, STICK RELAY

POWER SWITCH

TEMPORARY SWITCH

SERVICE SWITCH

TRANSFORMER

VARISTOR

NOISE SUPPRESSOR

REMOTE CONTROL SWITCH (LIQUID CRYSTAL)

THERMOSTAT

FUSE CAPACITY

RAS-09CH1

20 W

YES

YES (IC)

SPECIFICATIONS

10 A TIME DELAY FUSE

---------- ❈ 630g

UNIT

PIPES

❈630g for piping set of 5~8m.

❈670g for piping set of 5~8m.

REFRIGERANT

CHARGING VOLUME

(Refrigerant 22)

WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE

TYPE.

P - 105 VK1 (5m), P - 108 VK1 (8m)

– 5 –

RAC-07CHV1

20 W

1.5 µF, 400 V

YES (INTERNAL)

G333DB2Z

30 µF, 400 V

YES

3.15A

G4A

YES

450NR

RAS-07CH1

20 W

YES

YES (IC)

---------- ❈ 670g

CONSTRUCTION AND DIMENSIONAL DIAGRAM

MODEL RAS-07CH1, RAS-09CH1

MODEL RAC-07CHV1, RAC-09CHV1

88.5

Hole on the wall

for ø65mm pipe

Connecting cable

Line cord

Mounting

plate

Air suction grill

6.5

Discharge grill

785

Vertical air deflector

785

Top Air suction grill

Horizontal air deflector

6.5

Front cover

168 10

Cabinet

Wireless remote controller

120

265

About 340

About 430

About

400

VIEWED FROM BACK

(PIPE LEAD-OUT)

167.5 450 (167.5)

92 58 58

Drain outlet

Drain hose Drain pan

Narrow pipe (ø6.35)

Wide pipe (ø9.52)

55.5

Drain cap connection part

When piping is drawn

horizontally, exchange

the drain hose for the

drain cap.

Air outlet

Handle

Air inlet

(18)

490

Handle

Viewed from P

157

245

225

500

570

428

700

243

53 236

210 10 482

517

135

HITACHI

–6 –

MODEL

RAS-07CH1, RAS-09CH1

RAC-07CHV1, RAC-09CHV1

CONDENSING UNIT

WIDTH (mm)

785

700

HEIGHT (mm)

265

570

DEPTH (mm)

168

210

MODEL NAME AND DIMENSIONS

NAMES AND FUNCTIONS OF EACH PART

AIR FILTER

To prevent dust from coming into the indoor unit.

(Refer page 17)

POWER PLUG (NOT PROVIDED)

SUCTION GRILL (AIR INLET).

COOLING UNIT INDICATORS

Light indicator showing the operating condition.

(Refer page 8)

HORIZONTAL DEFLECTOR ●VERTICAL

DEFLECTOR (AIR OUTLET)

(Refer page 14)

REMOTE CONTROL

Send out operation signal to the indoor unit. So as to

operate the whole unit.

(Refer page 9)

DRAIN PIPE

Condensed water drain to outside.

CONNECTING CORD

AIR INLET (BACK, LEFT SIDE)

AIR OUTLET

Blow out warm air.

EARTH WIRE SCREW

RAS-07CH1, RAS-09CH1

RAC-07CHV1, RAC-09CHV1

COOLING UNIT

–7 –

RAS-

Temporary Switch

Non-conductor Stick

Press

about 7mm

COOLING UNIT INDICATORS

TEMPORARY SWITCH

Use this switch to start and stop when the remote

controller does not work. [Use non-conductor stick

(example toothpick)]

●By pressing the temporary switch, the operation is

done in previously set operation mode.

●When the operation is done using the temporary switch

after the power source is turned off and turn on again,

the operation is done in automatic mode.

POWER SWITCH

OPERATION INDICATOR

OPERATION LAMP

This lamp lights during operation.

TIMER LAMP

This lamp lights when the timer is working.

SIGNAL RECEIVER

There will be a beep sound when this receiver receive

signal from remote controller.

–8 –

NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT

■This controls the operation function and timer setting of the room air conditioner. The range of

control is about 4 meters. If indoor lighting is controlled electronically, the range of control may be

shorter.

Precautions for Use

●Do not put the remote controller in direct

sunlight and high temperature.

●Do not drop it on the floor, and protect

it from water.

●If you press the FUNCTION selector

button during operation, the air

conditioner may stop for about 3 minutes

for protection before you can start it

again. (unless you turn off and on again

the power source)

You can use the remote controller by fixing it on the

wall with the accessory parts.

●Before fixing it,

make sure the

unit can be

controlled by the

remote control

unit at the fixing

position.

REMOTE

CONTROLLER

HOLDER

CANCEL Button

Cancel timer reservation.

Signal Transmission

ON/OFF Button

Press this button to start operation.

Press it again to stop operation.

FUNCTION Button

Select the operation mode.

(Page 12)

DEHUMIDIFY Button

Dehumidify mode direct selection.

(Page 11)

Reserve Button

Timer setting reservation.

OFF TIMER Button

Select the turn OFF time.

ON TIMER Button

Select the turn ON time.

Transmission Sign

The transmission sign blinks

when a signal has been send.

TEMPERATURE Button

Room temperuture setting.

Value will change more quickly

when keep pressing.

(Page 12)

FAN SPEED Button

Select the fan speed for

cooling and circulation mode.

(Page 12)

AUTO SWING Button

Control the angle of the

horizontal air deflector.

( Page 14)

–9 –

This manual suits for next models

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