Hitachi RAC-18WED User Manual

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT + OUTDOOR UNIT
SERVICE MANUAL
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
SPECIFICATIONS
CONTENTS
SPECIFICATIONS ------------------------------------------------------------------- 6
HOW TO USE ----------------------------------------------------------------------- 9
CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 18
MAIN PARTS COMPONENT --------------------------------------------------- 21
WIRING DIAGRAM ---------------------------------------------------------------- 23
CIRCUIT DIAGRAM --------------------------------------------------------------- 25
After installation
BLOCK DIAGRAM ----------------------------------------------------------------- 30
BASIC MODE ----------------------------------------------------------------------- 31
REFRIGERATING CYCLE DIAGRAM --------------------------------------- 41
DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 47
SERVICE CALL Q & A ---------------------------------------------------------- 74
TROUBLE SHOOTING ----------------------------------------------------------- 77
PARTS LIST AND DIAGRAM --------------------------------------------------10
JCH-WH
INDOOR UNITOUTDOOR UNIT
INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
RAK-18PED RAC-18WED
RAK-25PED
RAK-25PEDC
RAC-25WED RAC-35WED
RAK-35PED
RAK-35PEDC
RAK-50PED
RAK-50PEDC
RAC-50WED
(KW)
(B.T.U./h)
(KW)
(B.T.U./h)
W 780 660(+60) 780 660(+60) 780 660(+60) 780 792(+91)
H 280 530 280 530 280 530 280 600
D 215 278(+55) 215 278(+55) 215 278(+55) 215 299(+47)
MODEL
POWER SOURCE
TOTAL INPUT (W
TOTAL AMPERES (A)
CAPACITY
COOLING
HEATING
TOTAL INPUT (W
TOTAL AMPERES (A)
CAPACITY
1,090 (250
1,460)
DIMENSIONS
(mm)
1,560 (500 2,100)
3.19-3.05
2.00 (0.90 2.50)
6,820 (3,070 8,530)
620 (250
970)
2.50 (0.90 3.20)
3.62-3.46
7.5 23 7.5 23 7.5 24.5 39.5
8,530 (3,070 10,920)
880 (250
1,250)
NET WEIGHT (Kg)
TYPE
DC INVERTER
V032-022, zH05,ESAHP 1 V032-022, zH05,ESAHP 1 V032-022, zH05,ESAHP 1 V032-022 , zH05,ESAHP 1
580 ( 700 (250 1,290)1,010)
4.56-4.36
3.40 (0.90 4.40)
11,600 (3,070
15,010)
5.41-5.18
1,100 (250 1,700)
5.56-5.31
14,330 (3,070 17,060)
3.84-3.67
2.50 (0.90 3.10)
8,530 (3,070
10,580)
7.16-6.85
3.50 (0.90 4.00) 5.00 (1.90 5.20)
11,940 (3,070
13,650) 17,060 (6,480 17,740)
20,470 (7,510
24,910)
7.62-7.29
1,660 (500
2,750)
4.20 (0.90 5.00) 6.00 (2.20 7.30)
25
0
Johnson Controls-Hitachi Air Conditioning Wuhu Co., Ltd.
NO. 0105E
8
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY------------- 44
L.H
RAK-18PED/RAC-18WED
RAK-35PED/RAC-35WED
RAK-50PED/RAC-50WED
RAK-25PED/RAC-25WED
RAK-35PEDC/RAC-35WED
RAK-50PEDC/RAC-50WED
RAK-25PEDC/RAC-25WED
RAK-18PED
RAK-25PED
RAK-35PED
RAK-50PED
RAK-25PEDC
RAK-35PEDC
RAK-50PEDC
RAC-18WED
RAC-25WED
RAC-35WED
RAC-50WED
9
1

Hitachi RAC-18WED Specifications

General

Power Supply	220-240V, 50Hz
Refrigerant	R410A
Weight (Indoor Unit)	12 kg
Type	Split Air Conditioner
Cooling Capacity	18000 BTU

Summary

Technical Information and Specifications

Safety During Repair Work

Semiconductor Handling Standards

Handling Precautions for Semiconductors

Guidelines for safely carrying and storing semiconductor components and PC boards.

Detailed Specifications

Manual Operation Modes

Operation Mode Selection

How to select between Heating, Cooling, and Dehumidifying modes.

Room Temperature and Fan Speed Settings

Adjusting room temperature and fan speed for optimal comfort.

Advanced Operation Modes

ECO Operation and Airflow Adjustment

Using ECO mode and adjusting airflow direction.

Operational and Installation Precautions

Precautions During Operation and Installation

Important safety measures for operation and unit installation.

Unit Maintenance

Cleaning Procedures

Steps for cleaning the front panel and air filter.

Service and Warranty Information

Inspection and Warranty Details

Regular inspection guidelines and after-sales service information.

Indoor Unit Construction and Dimensions

Outdoor Unit Construction and Dimensions

Main Component Parts and Specifications

Component Specifications

Specifications for key components like thermostat, fan motor, and compressor.

Wiring and Circuit Diagrams

Wiring Diagrams

Diagrams showing electrical connections for various unit parts.

Circuit Diagrams

Electrical circuit diagrams for indoor and outdoor units.

System Block Diagram

Basic Operation Modes

Operation Mode Details

Cooling Operations

Details on basic, powerful, and defrost cooling operations.

Dehumidifying and Heating Operations

Details on dehumidifying and basic/advanced heating operations.

Reversing Valve Defrosting

Refrigerating Cycle Diagrams

Disassembly and Reassembly Procedures

Indoor Unit Disassembly

Steps for removing indoor unit panels, PCBs, and motors.

Outdoor Unit Electrical Parts Removal

Steps to remove outdoor unit electrical components.

Circuit Operation Descriptions

Power and Control Circuit Operation

Description of power circuits, reset, and fan motor control.

Signal and Sensor Circuit Operation

Operation of signal reception, temperature sensors, and communication circuits.

Dip-switch and Other Circuit Settings

Dip-switch functions and other circuit settings.

Troubleshooting: General and Remote Control

Service Call Q&A

Troubleshooting common operational issues via Q&A.

Remote Control and Signal Interference

Resolving remote control issues and signal jamming.

Troubleshooting: Inspection and Safety Procedures

Troubleshooting Inspection and Safety

Inspection instructions and power circuit discharge safety.

Connector Handling Instructions

Proper methods for handling electrical connectors.

Self-Diagnosis and Error Codes

Self-Diagnosis Display and Memory

Interpreting self-diagnosis displays and using the memory function.

Lighting Mode and Blinking Code Troubleshooting

Understanding self-diagnosis lighting modes and blinking codes.

Specific Troubleshooting Scenarios

Forced Cooling Operation

How to perform forced cooling operation for testing.

Troubleshooting: Power and Compressor Issues

Diagnosing power failures and compressor non-operation.

Troubleshooting: Fan Motor and Signal Issues

Resolving fan motor and remote control signal problems.

Refrigerating Cycle Checking

Outdoor Unit Test Switch Operation

Independent Outdoor Unit Operation

Parts List and Diagrams