Hitachi RAS-07BH1 User manual

(W)

(A)

(kW)

(BTU/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.0016E

SERVICE MANUAL

TECHNICAL INFORMATION

FOR SERVICE PERSONNEL ONLY

1φ, 220 V, 50 Hz

850 - 875 1,130

3.95 - 4.06 5.25

2.25 - 2.60 3.60

7,679 - 8,874 12,287

820 - 840 1300

3.81 - 3.90 6.03

2.50 - 2.90 4.20

8,533 - 9,898 14,335

785 775 815 820

250 500 298 520

175 300 194 280

930938

SPECIFICATIONS

CONTENTS

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

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

NAMES AND FUNCTIONS OF EACH PART------------------------------- 8

MAIN PARTS COMPONENT ---------------------------------------------------23

WIRING DIAGRAM-----------------------------------------------------------------25

BASIC MODE ------------------------------------------------------------------------33

AUTO SWING FUNCTION ------------------------------------------------------37

SERVICE CALL Q & A -----------------------------------------------------------38

REFRIGERATION CYCLE -------------------------------------------------------44

PARTS LIST AND DIAGRAM---------------------------------------------------46

RAS-07BH1/RAC-07BH1

RAS-09BH1/RAC-09BH1

RAS-14BH1/RAC-14BH1

REFER TO THE FOUNDATION MANUAL

COOLING UNIT CONDENSING UNIT

WALL TYPE

(mm)

(kg)

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

ROOM AIR CONDITIONER

COOLING UNIT + CONDENSING UNIT

COOLING UNIT CONDENSING UNIT

RAS-07BH1

RAS-09BH1 RAC-07BH1

RAC-09BH1 RAS-14BH1 RAC-14BH1

INDOOR UNIT

OUTDOOR UNIIT

RAS-09BH1

RAS-07BH1

RAS-14BH1

RAC-09BH1

RAC-07BH1

RAC-14BH1

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.

First, I must disconnect

the power cord plug

from the power outlet.

DANGER

−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 −

1. In quiet operation or stopping the 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 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

°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

−4 −

20 W

2.5 µF, 400 V

YES (INTERNAL)

SL232CV-C7LU

35 µF, 400 V

YES

MODEL

FAN MOTOR

FAN MOTOR CAPACITOR

FAN MOTOR PROTECTOR

COMPRESSOR

COMPRESSOR MOTOR CAPACITOR

OVERLOAD PROTECTOR

OVERHEAT PROTECTOR

FUSE (for MICRO COMPUTER)

POWER RELAY

POWER SWITCH

TEMPORARY SWITCH

SERVICE SWITCH

TRANSFORMER

VARISTOR

NOISE SUPPRESSOR

REMOTE CONTROL SWITCH (LIQUID CRYSTAL)

THERMOSTAT

FUSE CAPACITY

10 W

1 µF, 400 V

YES

3.15A

891WP-A-C

YES

470NR

YES

YES (IC)

SPECIFICATIONS

10 A TIME DELAY FUSE

---------- 600g

UNIT

PIPES

600g for piping set of 5m.

1,120g for piping set of 5m.

REFRIGERANT

CHARGING VOLUME

(Refrigerant 22)

WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE

TYPE.

8 W

1 µF, 400 V

YES

3.15A

891WP-A-C

YES

470NR

YES

YES (IC)

---------- 1,120g

RAS-07BH1 RAC-07BH1 RAS-14BH1 RAC-14BH1

20 W

2.5 µF, 400 V

YES (INTERNAL)

SG533QB1

30 µF, 400 V

YES

−5 −

15 A TIME DELAY FUSE

RAS-09BH1 RAC-09BH1

CONSTRUCTION AND DIMENSIONAL DIAGRAM

MODEL RAS-07BH1

RAS-09BH1

MODEL RAC-07BH1

RAC-09BH1

Top air suction grill

Front panel

Front cover

Cabinet

785

Air suction grill

248

Horizontal air deflector

Discharge grill

Vertical air deflector

400

Mounting plate

173

165

VIEWED FROM BACK

(Pipe lead-out)

120

192.5 70

(192.5)

Line code

Connecting cable Hole on the wall

for φ65mm pipe

Wide pipe(φ9.52)

Narrow pipe(φ6.35)

Drain hose

Drain cap connection part

Drain pan

When piping is drawn

horizontally , exchange

the drain hose for the

drain cap.

775

500

482

(18)

159.5

700 60 258

300

Air outlet

(19.5)

Handle

258

433

443

Air inlet

145

Handle

428

Air inlet

VIEWED FROM P

300

500

280

10 (10)

Drain hole

−6 −

Wireless remote controller

120

MODEL RAS-14BH1

MODEL RAC-14BH1

Wireless remote controller

120

VIEWED FROM P −7 −

Mounting plate 1

194

187

Air suction grill

Discharge grill

Vertical air deflector

815

298

Horizontal air deflector

VIEWED FROM BACK

(Pipe lead-out)

Line code

Connecting cable Hole on the wall

for φ65mm pipe Wide pipe(φ9.52)

Narrow pipe(φ6.35)

Drain hose

Drain cap connection part

When piping is drawn

horizontally , exchange

the drain hose for the

drain cap.

42.5

103

182.5 450 (182.5)

599

455

Air inlet

186 Handle

415

Air inlet

60 820

500

520

Air outlet

260

280

Handle

115

97 500

292

272

10 (10)

Drain hole

146

50 12

Front panel

Front cover

Cabinet

Top air suction grill

INDOOR UNIT

OUTDOOR UNIT

WIDTH (mm)

785

775

MODEL

RAS-07BH1/RAS-09BH1

RAC-14BH1

HEIGHT (mm)

250

500

DEPTH (mm)

175

300

MODEL NAME AND DIMENSIONS

NAMES AND FUNCTIONS OF EACH PART

AIR FILTER

To prevent dust from coming into the indoor unit.

(Refer page 16)

POWER PLUG (NOT PROVIDED)

INDOOR UNIT INDICATORS

Light indicator showing the operating condition.

(Refer page 5)

FRONT PANEL (AIR INLET)

HORIZONTAL DEFLECTOR VERTICAL

DEFLECTOR (AIR OUTLET)

(Refer page 12)

REMOTE CONTROL

Send out operation signal to the indoor unit. So as

to operate the whole unit.

(Refer page 6)

DRAIN PIPE

Condensed water drain to outside.

CONNECTING CORD

AIR INLET (BACK, LEFT SIDE)

AIR OUTLET

RAC-07BH1/RAC-09BH1

RAS-14BH1 815 298 194

820 520 280

−8 −

INDOOR UNIT INDICATORS

OPERATION INDICATOR

OPERATION LAMP

This lamp lights during operation.

This lamp lights in the following cases during heating.

While this is lit,heated air will not come out of the indoor unit.

OPERATION LAMP

This lamp lights during operation.

The OPERATION LAMP flashes in the following cases

during heating.

(1)During preheating

For about 2–3 minutes after starting up.

(2)During defrosting

Defrosting will be performed about once an hour

when frost forms on the heat exchanger of the

outdoor unit, for 5–10 minutes each time.

HOT KEEP LAMP

(1)During preheating

For about 2–3 minutes after starting up.

(2)During defrosting

Defrosting will be performed about once an hour

when frost forms on the heat exchanger of the

outdoor unit, for 5–10 minutes each time.

TIMER LAMP

This lamp lights when the timer is working.

SIGNAL RECEIVER

There will be abeep sound when this receiver receives

signal from remote controller.

TEMPORARY SWITCH

Use this switch to start and stop when the remote

controller does not work.

By setting 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.

HITACHI

RAS-09BH1

RAS-07BH1

RAS-14BH1

RAS-09BH1

RAS-07BH1

RAS-14BH1

−9 −

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