Hitachi 0159E Service Manual

SERVICE MANUAL

TECHNICAL INFORMATION

RAS-14CH3 RAS-14CH1

RAC-14CH3 RAC-14CH1

NO. 0159E

RAS-14CH3/ RAS-14CH1 RAC-14CH3/ RAC-14CH1

REFER TO THE FOUNDATION MANUAL

CONTENTS

SPECIFICATIONS ------------------------------------------------------------------- 4 SAFETY PRECAUTION ----------------------------------------------------------- 5 HOW TO USE ------------------------------------------------------------------------ 7 CONSTRUCTION AND DIMENSIONAL DIAGRAM ---------------------- 25 MAIN PARTS COMPONENT --------------------------------------------------- 26 WIRING DIAGRAM ----------------------------------------------------------------- 28 BASIC MODE ------------------------------------------------------------------------ 35 AUTO SWING FUNCTION ------------------------------------------------------- 39 REFRIGERATING CYCLE DIAGRAM ---------------------------------------- 28 SERVICE CALL Q & A ----------------------------------------------------------- 28 TROUBLE-SHOOTING ------------------------------------------------------------40 PARTS LIST AND DIAGRAM --------------------------------------------------- 42

SPECIFICATIONS

TYPE

MODEL POWER SOURCE

TOTAL INPUT

COOLING

HEATING

DIMENSIONS (mm)

NET WEIGHT (kg)

TOTAL AMPERES

CAPACITY

TOTAL INPUT TOTAL AMPERES

CAPACITY

(W)

(A)

(kW)

(B.T.U./h)

(W)

(A)

(kW)

(B.T.U./h)

H D

WALL TYPE

INDOOR UNIT OUTDOOR UNIT

RAS-14CH3, RAS-14CH1 RAC-14CH3, RAC-14CH1

1Ø, 220 – 230 V, 50 Hz

1290 – 1330

6.0 – 5.9

3.55 – 3.60

12110 – 12284

1370 – 1410

6.3 – 6.2

4.10 – 4.15

13990 – 14160 815 820 298 520

179❈(185) 280

839

❈ After installation

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

ROOM AIR CONDITIONER

INDOOR UNIT + OUTDOOR UNIT

JANUARY 2003

H.A.P.M.

SAFETY DURING REPAIR WORK

First, I must disconnect the power cord plug

from the power outlet.

DANGER

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 the user himself should absolutely be prohibited.

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

7. In installing the unit having been repaired, be careful to prevent the occurrence 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 1 MΩ 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 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 after 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 –

PREVENTION OF DAMAGE TO SEMICONDUCTORS

1. When carrying and handling semiconductors adopted in your Model during maintenanace and inspection thereof, much care should be taken to prevent the semiconductors from being damaged. Also, such care should be taken when handling any faulty Model which is to be returned to factory.

2. The semiconductors used in your Model are the following : (1) Micro computer

(2) Integrated circuits (IC) (3) Field-effect transistors (FET) (4) Printed circuit boards (PC boards) or the like on which the parts in (1) and (2) above are provided

3. Cautions in handling (1) Use a conductive container to carry or store the semiconductive parts. Even if they are faulty ones, also

handle them using such container.

(2) When parts as uncovered are handled (for counting, packing or for the like purpose), the hadler must use

his own body as conductor for earthing. For this purpose, put on an electrically conductive ring or bracelet at the wrist. Connect to the bracelet a conductor provided with a resistor of 1 M

and at the other end

with a clip for connection to the earth wire.

Conductive polyvinyl bag

▲

Conductive sponge

▲

Fig. 1 Conductive Container

(3) Be careful not to have your clothes be in contact with any part while you are holding it, even if the body

earthing is established.

(4) Be sure to place the parts on a grounded metallic plate. (5) Never fail to disconnect the power supply before starting repair of any PC board. Then, proceed to the repair

of the PC board on the grounded metallic plate.

Bracelet for body earthing (Elimik conductive band)

Fig. 2 Body Earthing

Clip for connection to each wire

– 2 –

(6) Soldering iron to be used should be a one with three wires (including an earth wire).

Metallic plate (of aluminium, stainless steel or other) or conductive rubber sheet

Work table

Bare copper wire (for body earthing)

Staple the wire

Fig. 3. Earthing of Work Table

Soldering iron

Resistor of 1 M

Earth wire

(1/2W)

Screw here using a rag plate

Fig. 4. Earthing of Soldering Iron

An ordinary soldering iron may also be used, but in such case, be sure to provide a perfect insulation (10MΩ or more to 100volts).

(7) While checking the circuits during maintenance, inspection or the other, strictly avoid any shortcircuiting of the

load circuit or other by the test probe of the measuring instrument.

Earth wire

– 3 –

SPECIFICATIONS

MODEL

FAN MOTOR

FAN MOTOR CAPACITOR

FAN MOTOR PROTECTOR

COMPRESSOR

COMPRESSOR MOTOR CAPACITOR

OVERLOAD PROTECTOR

PROTECTOR

FUSE (for MICRO COMPUTER)

POWER RELAY

POWER SWITCH

RAS-14CH3

10 W

1 µF, 450V

YES (INTERNAL)

3.0A

G4A-RY-200

YES

RAS-14CH1

10 W

1 µF, 450V

YES (INTERNAL)

3.0A

G4A-RY-200

YES

RAC-14CH3

20 W

2.5 µF, 450V

YES (INTERNAL)

SH933RC2-U

35 µF, 440V

YES

RAS-14CH1

20 W

2.5 µF, 450V

YES (INTERNAL)

SH933RC2-U

35 µF, 440V

YES

TEMPORARY SWITCH

SERVICE SWITCH

TRANSFORMER

VARISTOR

NOISE SUPPRESSOR

SOLID STATE RELAY FOR FAN (FAN SSR)

EXTERNAL FAN AND REVERSING VALVE RELAY

REMOTE CONTROL SWITCH (LIQUID CRYSTAL)

THERMOSTAT

FUSE CAPACITY

UNIT

450NR

S26MD02

YES (IC)

––––– ❈ 1,080g

YES

G4U

YES

450NR

S26MD02

G4U

YES

YES (IC)

15 A TIME DELAY FUSE

❈ 1,080g–––––

REFRIGERANT CHARGING VOLUME (Refrigerant 22)

❈ 1080g for piping set of 5 ~ 8m, additional 25g/m R22 is required for additional 8m onward, but cannot exceed

10m.

PIPES

WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE TYPE. P-103VK1 (3m), P-105VK1 (5m), P-108VK1 (8m), (P-103VK), (P-105VK)

– 4 –

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