Hitachi RAM-55QH4 User Manual

RAM-55QH4
RAM-65QH4
NO. 0217E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
OUTDOOR UNIT
JUNE 2004 Refrigeration & Air-Conditioning Division
SERVICE MANUAL
PM
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
CONTENTS
SPECIFICATIONS ------------------------------------------------------------------- 5
INSTALLATION ---------------------------------------------------------------------- 14
CONSTRUCTION AND DIMENSIONAL DIAGRAM ---------------------- 21
MAIN PARTS COMPONENT --------------------------------------------------- 23
CAPACITY DIAGRAM ------------------------------------------------------------- 25
WIRING DIAGRAM ----------------------------------------------------------------- 33
CIRCUIT DIAGRAM ---------------------------------------------------------------- 37
BLOCK DIAGRAM ------------------------------------------------------------------43
BASIC MODE ------------------------------------------------------------------------ 45
REFRIGERATING CYCLE DIAGRAM ---------------------------------------- 73
DESCRIPTION OF MAIN CIRCUIT OPERATION ------------------------ 77
TROUBLE SHOOTING ---------------------------------------------------------- 108
DISASSEMBLY AND REASSEMBLY --------------------------------------- 115
PARTS LIST AND DIAGRAM ------------------------------------------------- 118
RAM-55QH4
RAM-65QH4
After installation
NOTE:
This manual describes only points that differ from RAF-25,
50NH4, RAD-25, 40QH4 and RAM-70, 80QH4 (TC No.
0757EF), RAK-25, 35, 50NH4 (TC No. 0761EF), RAD-25,
40NH4, RAI-25, 40NH4 (TC No. 0763EF) for items not
described in this manual.
850
650
298
50
(W)
(A)
COOLING CAPACITY
DC INVERTER DUAL SYSTEM MULTI
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
SPECIFICATIONS
OUTDOOR UNIT
RAM-55QH4
RAM-65QH4
HEATING CAPACITY
DIMENSIONS (mm)
NET WEIGHT
1ø, 220 - 240V, 50Hz
W
H
D
(kg)
(kW)
(B.T.U.)
REFER TO THE SPECIFICATIONS PAGE

Hitachi RAM-55QH4 Specifications

General

Brand	Hitachi
Model	RAM-55QH4
Category	Air Conditioner
Language	English

Summary

Safety and General Precautions

SAFETY DURING REPAIR WORK

Essential safety guidelines for service personnel to follow during repairs.

SEMICONDUCTOR HANDLING STANDARDS

Procedures for safe handling of sensitive electronic components to prevent damage.

OPERATIONAL CAUTIONS AND NOTES

Important warnings and notes regarding unit operation and user safety.

Specifications and Performance Data

OUTDOOR UNIT SPECIFICATIONS

Detailed technical specifications for the outdoor unit models.

CAPACITY AND PERFORMANCE CHARTS

Cooling/heating capacity, sound pressure level, and piping length effects data.

INSTALLATION AND COMBINATION GUIDELINES

Guidelines for pipe length, height differences, and indoor unit combinations.

System Construction and Diagrams

CONSTRUCTION AND DIMENSIONAL DIAGRAMS

Physical dimensions, construction details, and service space requirements of the outdoor unit.

MAIN PARTS COMPONENTS AND SPECIFICATIONS

Details on fan motor, compressor, and other key internal components and their specs.

ELECTRICAL AND REFRIGERATION SCHEMATICS

Wiring, circuit, block, and refrigerating cycle diagrams for system understanding.

Operation, Troubleshooting, and Parts

BASIC AND SPECIAL OPERATING MODES

Explanation of standard modes (cooling, heating, defrost) and special operations.

TROUBLESHOOTING AND DIAGNOSTIC GUIDES

Fault finding methods, LED status interpretation, and repair procedures.

DISASSEMBLY AND PARTS LISTING

Instructions for unit disassembly and a comprehensive list of all parts with diagrams.