Hitachi RAC-60DH7 User Manual

NO. 0411E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT + OUTDOOR UNIT
APRIL 2008 Refrigeration & Air-Conditioning Division
SERVICE MANUAL
PM
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
SPECIFICATIONS
RAD-50DH7A
RAD-60DH7A
RAD-70DH7A
CONTENTS
SPECIFICATIONS ----------------------------------------------------- 4
HOW TO USE ---------------------------------------------------------- 6
CONSTRUCTION AND DIMENSIONAL DIAGRAM ------- 23
MAIN PARTS COMPONENT ------------------------------------- 26
WIRING DIAGRAM -------------------------------------------------- 28
CIRCUIT DIAGRAM ------------------------------------------------- 29
BLOCK DIAGRAM --------------------------------------------------- 35
BASIC MODE --------------------------------------------------------- 39
REFRIGERATING CYCLE DIAGRAM ------------------------- 52
DESCRIPTION OF MAIN CIRCUIT OPERATION --------- 54
SERVICE CALL Q & A -------------------------------------------- 80
TROUBLE SHOOTING --------------------------------------------- 83
PARTS LIST AND DIAGRAM ----------------------------------- 103
RAD-50DH7A/RAC-50DH7
RAD-60DH7A/RAC-60DH7
RAD-70DH7A/RAC-70DH7
After installation
RAC-50DH7
RAC-60DH7
RAC-70DH7
(W)
(A)
(kW)
(B.T.U./h)
(W)
(A)
(kW)
(B.T.U./h)
W
H
D
(kg)
(DUCTING TYPE)
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
CAPACITY
TOTAL INPUT
TOTAL AMPERES
CAPACITY
DIMENSIONS
(mm)
NET WEIGHT
COOLING
HEATING
OUTDOOR UNIT
RAC-50DH7
INDOOR UNIT
RAD-50DH7A
900
270
720
35
1 Ø, 50 Hz, 220-240V
1,400 (200 ~ 2,100)
6.40 ~ 5.90
5.00 (0.90 ~ 6.00)
17,070 (3,073 ~ 20,490)
1,590 (200 ~ 2,200)
7.30 ~ 6.70
6.00 (0.90 ~ 7.00)
20,490 (3,073 ~ 23,901)
850
800
298
55
900
270
720
35
1 Ø, 50 Hz, 220-240V
1,870 (200 ~ 2,500)
8.55 ~ 7.90
6.00 (0.90 ~ 7.00)
20,490 (3,073 ~ 23,901)
2,130 (200 ~ 2,600)
9.75 ~ 9.00
7.30 (0.90 ~ 8.00)
24,920 (3,073 ~ 27,315)
850
800
298
55
OUTDOOR UNIT
RAC-60DH7
INDOOR UNIT
RAD-60DH7A
OUTDOOR UNIT
RAC-70DH7
INDOOR UNIT
RAD-70DH7A
900
270
720
35
1 Ø, 50 Hz, 220-240V
2,530 (200 ~ 2,920)
11.60 ~ 10.70
7.10 (0.90 ~ 8.00)
24,240 (3,073 ~ 27,310)
2,340 (200 ~ 3,100)
10.70 ~ 9.80
8.00 (0.90 ~ 9.00)
27,310 (3,073 ~ 30,730)
850
800
298
55

Hitachi RAC-60DH7 Specifications

General

Brand	Hitachi
Model	RAC-60DH7
Category	Air Conditioner
Language	English

Summary

Semiconductor Handling Standards

Items to Observe in Semiconductor Handling

Details essential precautions for handling sensitive electronic parts safely.

Air Conditioner Safety Precautions

Precautions During Installation

Safety guidelines to follow during the installation process of the unit.

Precautions During Shifting or Maintenance

Precautions During Operation

Essential safety rules to observe while the air conditioner is in use.

Air Conditioner Operational Functions

Auto Restart Control

Automatic Operation Mode

Timer Reservation Functions

Sleep Timer Functions

Construction and Dimensional Diagrams

Electrical Diagrams

Wiring Diagram

Illustrates the electrical connections between components and units.

Circuit Diagram for Wired Remote Control

System Block Diagram

Detailed Mode Operations

Refrigerating Cycle Diagram

Main Circuit Operation Descriptions

Reset Circuit

Buzzer Circuit

Initial Setting and Thermistor Circuits

Switch and Sensor Circuits

Fan Motor and Control Circuits

Remote Receiver and Static-Pressure Switch Circuits

Power Circuit and Related Systems

Power Circuitry Overview

Describes the main power circuit, including active module and diode stacks.

Indoor/Outdoor Interface Circuit

Power Module Circuitry

Details the system power module's operation and control of the compressor motor.

Power Supply Circuitry

Describes the switching power supplies for control circuits and the unit.

Rotor Position and Peripheral Circuits

Temperature Detection and Control Circuits

Electric Expansion Valve and Power Factor Control

Service Call Q&A and Troubleshooting

Service Call Q&A by Mode

Addresses common issues and questions categorized by operating mode (Cooling, Dehumidifying, Heating).

Service Call Q&A for Other Functions

Covers questions related to auto functions, timers, and general operation.

Trouble Shooting Precautions

Essential safety precautions to follow before performing troubleshooting checks.

Discharge Procedure and Power Shut Off Method for Power Circuit

Safe methods for discharging capacitors and shutting off power to the circuit.

System Diagnostics and Troubleshooting

Troubleshooting Timer Lamp Blinks

Guides for diagnosing issues based on timer lamp flashing patterns.

Self-Diagnosis Lighting Mode Interpretation

Explains the meaning of self-diagnosis indicator lights (LD301, LD302, LD303, LD304).

Checking Indoor Unit Electrical Parts

Step-by-step guide for diagnosing issues with the indoor unit's electrical components.

Checking Outdoor Unit Operation and Parts

Diagnostic steps for outdoor unit operation, interface, and electrical parts.

Checking the Remote Controller

Procedures for testing and verifying the functionality of the remote controller.

Checking the Outdoor Unit Electrical Parts

Troubleshooting outdoor unit electrical parts, including power circuit and self-diagnosis.

System Diagnostics and Operation Guides

Checking the Refrigerating Cycle

Procedure for diagnosing issues like gas leaks and compressor defects.

System Power Module Diagnosis

Methods for diagnosing the system power module using a tester.

Operating the Outdoor Unit with Service Switch

Operating the Outdoor Unit Independently

Parts Lists and Diagrams

Indoor Unit Parts List and Diagram

Outdoor Unit Parts List and Diagram