Hitachi RAM-53QH5 User Manual

RAM-52QH5
RAM-53QH5
NO. 0428E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
OUTDOOR UNIT
AUGUST 2008 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 --------------------------------------- 71
DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 75
TROUBLE SHOOTING ---------------------------------------------------------- 106
DISASSEMBLY AND REASSEMBLY --------------------------------------- 113
PARTS LIST AND DIAGRAM ------------------------------------------------- 116
RAM-52QH5
RAM-53QH5
After installation
NOTE:
This manual describes only points that differ from RAF-25, 35,
50NH5, RAD-25, 35NH5, RAD-25, 35NH5 and RAM-80QH5
(TC No. 0771EF), RAI-25, 35NH5 (PM No. 0271E), RAI-50NH5
and RAC-50NH5 (PM No. 0274E), RAK-18, 25, 35NH5 (PM
No. 0269E), RAK-50NH5 and RAC-50NH5 (PM No. 0302E)
for items not described in this manual.
850
650
298
50
(W)
(A)
COOLING CAPACITY
DC INVERTER DUAL AND TRIPLE SYSTEM MULTI
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
SPECIFICATIONS
OUTDOOR UNIT
RAM-52QH5
HEATING CAPACITY
DIMENSIONS (mm)
NET WEIGHT
1ø, 220 - 240V, 50Hz
W
H
D
(kg)
(kW)
(B.T.U.)
REFER TO THE SPECIFICATIONS PAGE
RAM-53QH5

Hitachi RAM-53QH5 Specifications

General

Brand	Hitachi
Model	RAM-53QH5
Category	Air Conditioner
Language	English

Summary

Safety During Repair Work

Safety Precautions

Essential safety guidelines for personnel performing repairs.

Working Standards for Semiconductor Handling

Semiconductor Handling Guidelines

Standards for safely handling semiconductor components to prevent damage.

Specifications

Outdoor Unit Specifications

Technical specifications for the outdoor unit models.

Installation

Pipe Length and Height Difference

Details on maximum pipe length and height differences for installation.

Construction and Dimensional Diagram

RAM-52QH5 Dimensions

Diagrams showing the physical dimensions of the RAM-52QH5 outdoor unit.

Main Parts Component

Fan Motor Specifications

Technical details and specifications for the fan motor.

Capacity Diagrams

Cooling Capacity vs. Ambient Temperature

Chart showing cooling capacity based on ambient temperature for RAM-52QH5.

Wiring Diagram

RAM-52QH5 Wiring Diagram

Electrical wiring diagram for the RAM-52QH5 outdoor unit.

Block Diagram

RAM-52QH5 Block Diagram

Functional block diagram illustrating the system's components and interactions.

Basic Mode

Operation Mode Descriptions

Explanation of different operating modes like Fan, Cooling, Heating, and Auto.

Defrost Operation

Defrost Operation Details

Explanation of the defrost system, conditions, and release criteria.

Description of Main Circuit Operation

Power Circuit Operation

Explanation of the power circuit's function in rectifying and boosting voltage.

Troubleshooting and Inspection

Inspecting Outdoor Electrical Parts

Table and guide for inspecting outdoor electrical parts using LED indicators.

Disassembly and Reassembly

Electric Parts Disassembly

Step-by-step guide for disassembling electric parts of the outdoor unit.

Parts List and Diagram

Parts List and Diagram (RAM-52QH5)

Comprehensive list and visual diagram of parts for the RAM-52QH5 model.