Hitachi RAC-18WPC User Manual

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
OUTDOOR UNIT
SERVICE MANUAL
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
SPECIFICATIONS
CONTENTS
SPECIFICATIONS ------------------------------------------------------------------- 6
CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 8
MAIN PARTS COMPONENT --------------------------------------------------- 9
WIRING DIAGRAM ---------------------------------------------------------------- 11
After installation
BLOCK DIAGRAM ----------------------------------------------------------------- 13
REFRIGERATING CYCLE DIAGRAM --------------------------------------- 14
DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 16
SERVICE CALL Q & A ---------------------------------------------------------- 24
TROUBLE SHOOTING ----------------------------------------------------------- 28
PARTS LIST AND DIAGRAM --------------------------------------------------
HHAW
RAC-18WPC
RAC-25WPC
OUTDOOR UNIT
OUTDOOR UNIT
OUTDOOR UNIT
RAC-18W
RAC-25W
(KW)
(B.T.U./h)
(KW)
(B.T.U./h)
W
660(+60)
660(+60)
H
530
530
D
278(+35)
278(+35)
MODEL
POWER SOURCE
TOTAL INPUT (W
TOTAL AMPERES (A)
CAPACITY
COOLING
HEATING
TOTAL INPUT (W
TOTAL AMPERES (A)
CAPACITY
DIMENSIONS
(mm)
3.12-2.97
2.00 (0.90
2.50)
8,530 (3,070
10,580)
580 (250
970)
2.50 (0.90
27.5 27.5
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
550 (
700 (250
)
1,290)
4.56-4.36
3.40 (0.90
4.40)
11,600 (3,070
15,010)
3.75-3.59
2.50 (0.90
3.10)
8,530 (3,070
10,580)
25
0
PC
PC
RAC-18WPC
RAC-25WPC
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY-------------15
0100E
41
1010
Johnson Controls - Hitachi Air Conditioning Wuhu Co., Ltd.

Hitachi RAC-18WPC Specifications

General

Brand	Hitachi
Model	RAC-18WPC
Category	Air Conditioner
Language	English

Summary

Safety During Repair Work

Working Standards for Preventing Breakage of Semiconductors

Specifications

Construction and Dimensional Diagram

Main Parts Component

Wiring Diagram

Block Diagram

Refrigerating Cycle Diagram

Procedure for Disassembly and Reassembly

Description of Main Circuit Operation

Main Circuit Operation Details

Covers power circuits, valve, thermistor, and fan motor controls.

Service Call Q&A

Operation Mode and General Q&A

Addresses questions on cooling, heating, defrost, automatic modes, and remote control.

Trouble Shooting

Power Circuit Troubleshooting Procedures

Safe discharge and power shut-off methods for the power circuit.

Self-Diagnosis and Electrical Part Checks

Explains self-diagnosis, LED codes, and electrical part diagnostic flowcharts.

Refrigerating Cycle and Operational Checks

Procedures for checking refrigerating cycle, gas leakage, and independent operation.

Parts List and Diagram

Outdoor Unit Parts Diagram

Visual representation of the outdoor unit components with numerical labels.

Outdoor Unit Parts List

Detailed list of outdoor unit parts with part numbers and names.