Hitachi RAS-10G5 Manual de usuario

NO. 0487E

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

ROOM AIR CONDITIONER

INDOOR UNIT + OUTDOOR UNIT

MARCH 2011

Refrigeration & Air-Conditioning Division

SERVICE MANUAL

REFER TO THE FOUNDATION MANUAL

TECHNICAL INFORMATION

FOR SERVICE PERSONNEL ONLY

(W)

(A)

(kW)

(B.T.U./h)

(kg)

(WALL TYPE)

TYPE

MODEL

POWER SOURCE

TOTAL INPUT

TOTAL AMPERES

CAPACITY

DIMENSIONS

(mm)

NET WEIGHT

SPECIFICATIONS

CONTENTS

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

HOW TO USE ---------------------------------------------------------- 8

CONSTRUCTION AND DIMENSIONAL DIAGRAM---------29

MAIN PARTS COMPONENT --------------------------------------31

WIRING DIAGRAM---------------------------------------------------34

CIRCUIT DIAGRAM--------------------------------------------------37

PRINTED WIRING BOARD LOCATION DIAGRAM --------39

BLOCK DIAGRAM----------------------------------------------------41

BASIC MODE ----------------------------------------------------------43

REFRIGERATING CYCLE DIAGRAM---------------------------46

DESCRIPTION OF MAIN CIRCUIT OPERATION-----------47

AUTO SWING FUNCTION-----------------------------------------55

SERVICE CALL Q & A----------------------------------------------56

PARTS LIST AND DIAGRAM--------------------------------------60

RAS-10G5 / RAC-10G5

RAS-14G5 / RAC-14G5

COOLING

INDOOR UNIT

RAS-10G5

780

280

220

RAS-10G5

RAS-14G5

OUTDOOR UNIT

RAC-10G5

INDOOR UNIT

RAS-14G5

OUTDOOR UNIT

RAC-14G5

700

468

258

700

468

258

780

280

220

1 PHASE, 50 Hz, 220-230V

870-900

4.00-3.95

2.90-2.90

9890-9890

1 PHASE, 50 Hz, 220-230V

1210-1230

5.70-5.50

3.02-3.01

12,460-12,630

RAC-10G5

RAC-14G5

! 1 !

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. Modi cation 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,  oor 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 in ammable 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.

! 2 !

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 1M 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

! 3 !

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

Bare copper wire (for body earth)

Working

table

Resistor of 1M (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

! 4 !

!CAUTION

1. In quiet or stop operation, slight  owing 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 recommended to stop the operation and to disconnect the power cord plug

from the power outlet for safety.

3. In the event of power failure, the airconditioner will restart automatically in the previously selected mode

once the power is restored. In the event of power failure during TIMER operation, the timer will be reset

and the unit will begin or stop operating under a new timer setting.

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 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 21°C (70°F).

6. When the operation button is set to ^cool_ from other mode, the compressor will stop for about 3 minutes

as IC delay circuit protection.

! 5 !

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

FUSE CAPACITY (TIME DELAY FUSE)

THERMOSTAT

REMOTE CONTROL SWITCH (LIQUID CRYSTAL)

RAS-10G5

RAS-14G5

20 W

3.15A

G4A

YES

YES (SWITCHING

POWER SUPPLY)

450NR

---------

YES(IC)

YES

---------

30 W

2.5µF, 450VAC

YES

35µF, 450 VAC 45µF, 450 VAC

YES (EXTERNAL)

10 A 15 A

680gUNIT

MAX. PIPES

REFRIGERANT CHARGING

VOLUME

(Refrigerant R410A)

RAC-10G5 RAC-14G5

ASG108CV UG4B124JX

630g

15m

! 6 !

MODEL RAS-10G5 / RAC-10G5

Figure showing the installation of Indoor and Outdoor unit

In case the pipe length is more than 8m, add refrigerant R410A at 15 gram per every meter exceeds. However, pipe

length shall not exceed 15m.

CAUTION

● The difference in height

between the indoor and

outdoor unit should be kept

max 5m.

● 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.

Please use insulated drain

hose for the indoor piping

(commercial product).

The indoor piping should be

insulated with the enclosed

insulation pipe. (If the insulator

is insufficient, please use

commercial products).

Be sure to

completely

seal any gap.

! 7 !

MODEL RAS-14G5 / RAC-14G5

Figure showing the installation of Indoor and Outdoor unit

In case the pipe length is more than 8m, add refrigerant R410A at 10 gram per every meter exceeds. However, pipe

length shall not exceed 15m.

CAUTION

● The difference in height

between the indoor and

outdoor unit should be kept

max 5m.

● 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.

Please use insulated drain

hose for the indoor piping

(commercial product).

The indoor piping should be

insulated with the enclosed

insulation pipe. (If the insulator

is insufficient, please use

commercial products).

Be sure to

completely

seal any gap.

– 8 –

INDOOR UNIT

NAMES AND FUNCTIONS OF EACH PART

PRE-FILTER

To prevent dust from coming into the indoor unit.

(Refer Instruction manual)

FRONT PANEL

INDOOR UNIT INDICATORS

Light indicator showing the operating condition.

(Refer page 9)

HORIZONTAL DEFLECTOR ●VERTICAL

DEFLECTOR (AIR OUTLET)

REMOTE CONTROLLER

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

operate the whole unit.

(Refer Instruction manual)

OUTDOOR UNIT

WIDTH (mm)MODEL

RAS-10G5 / RAS-14G5

RAC-10G5 / RAC-14G5

HEIGHT (mm) DEPTH (mm)

MODEL NAME AND DIMENSIONS

780

700

280

468

220

258

DRAIN PIPE

Condensed water drain to outside.

CONNECTING CORD

AIR INLET (BACK, LEFT SIDE)

AIR OUTLET

– 9 –

INDOOR UNIT INDICATORS

OPERATION INDICATOR

FILTER LAMP

When the device is operated for a total of about 200

hours, the FILTER lamp lights to indicate that it is

time to clean the ﬁlter. The lamp goes out when the

“ (AUTO SWING)” button is pressed while the

device is on “STANDBY MODE”.

OPERATION LAMP

This lamp lights during operation.

TIMER LAMP

This lamp lights when the timer is working.

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.

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