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Hitachi RAC-50WPE User Manual

Hitachi RAC-50WPE
60 pages
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SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
OUTDOOR UNIT
SERVICE MANUAL
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
SPECIFICATIONS
CONTENTS
SPECIFICATIONS ------------------------------------------------------------------- 6
CONSTRUCTION AND DIMENSIONAL DIAGRAM ---------------------- 9
MAIN PARTS COMPONENT --------------------------------------------------- 11
WIRING DIAGRAM ---------------------------------------------------------------- 13
After installation
BLOCK DIAGRAM ----------------------------------------------------------------- 16
REFRIGERATING CYCLE DIAGRAM --------------------------------------- 17
DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 20
SERVICE CALL Q & A ---------------------------------------------------------- 37
TROUBLE SHOOTING ------------------------------------------------------------41
OUTDOOR UNIT
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY-------------19
PARTS LIST AND DIAGRAM
--------------------------------------------------56
NO.0120E
RAC-18WPE
RAC-42WPE
Johnson Controls-Hitachi Air Conditioning Wuhu Co., Ltd.
JCH-WH
OUTDOOR UNITOUTDOOR UNIT OUTDOOR UNIT
RAC-25W
RAC-42W
(KW)
(B.T.U./h)
(KW)
(B.T.U./h)
W
750(+65)
792(+85)
H
548
600
D
288(+27.5)
299(+47)
MODEL
POWER SOURCE
TOTAL INPUT (W
TOTAL AMPERES (A)
CAPACITY
COOLING
HEATING
TOTAL INPUT (W
TOTAL AMPERES (A)
CAPACITY
DIMENSIONS
(mm)
1,120 (300 1,700)
32.5
NET WEIGHT
TYPE
DC INVERTER
1 PHASE,50H z ,220-230V
5.10-4.88
4.20 (1.70 5.00)
14,330 (5,800 17,060)
18,430 (5,800 20,470)
5.99-5.73
1,317 (500 2,100)
5.40 (1.70 6.00)
PE
RAC-18W
750(+65)
548
288(+27.5)
419 (250 1,010)
32.5
1 PHASE,50H z ,220-230V
2.46-2.35
519 (250 970)
2.93-2.81
8,530 (3,070 10,920)
2.00 (0.90 2.5)
6,820 (3,070 8,530)
2.50 (0.90
3.20)
733 (250 1500)
3.87-3.71
11,600 (3,070 15,010)
8,530 (3,070 10,580)
3.40 (0.90
4.40)
PE
RAC-35W
750(+65)
548
288(+27.5)
941 (250
1,460)
32.5
1 PHASE,50H z ,220-230V
4.81-4.60
1,000 (250 1,700)
5.11-4.89
14,330 (3,070 17,060)
3.50 (0.90 4.00)
11,940 (3,070 13,650)
4.20 (0.90
5.00)
PE
PE
1 PHASE,50H z ,220-230V
549 (250 1,290)
3.08-2.95
2.50 (0.90
3.10)
39
OUTDOOR UNIT OUTDOOR UNIT
RAC-50W
792(+85)
600
299(+47)
1,471 (300
2,100)
6.69-6.40
5.00 (1.90 5.20)
17,060 (6,480 17,740)
20,470 (7,510 24,910)
7.09-6.78
1,558 (500 2,750)
6.00 (2.20 7.30)
PE
1 PHASE,50H z ,220-230V
39
FOR SERVICE PERSONNEL ONLY
RAC-25WPE
RAC-35WPE
RAC-50WPE
RA
C-18WPE
RAC-25WPE
RAC-35WPE
RAC-42WPE
RAC-50WPE
1

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Hitachi RAC-50WPE Specifications

General IconGeneral
TypeSplit System
Cooling Capacity5.0 kW
Heating Capacity6.0 kW
RefrigerantR410A
Power Supply220-240V, 50Hz
Energy Efficiency Ratio (EER)3.21
Coefficient of Performance (COP)3.61

Summary

Safety During Repair Work

Working Standards for Preventing Semiconductor Breakage

Semiconductor Handling Precautions

Provides guidelines for safely handling and storing semiconductor components.

Unit Specifications

Wiring Diagrams

Block Diagram Overview

Refrigerating Cycle Diagrams

Cooling Cycle Operation

Illustrates the refrigerant flow path during cooling mode operation.

Heating Cycle Operation

Illustrates the refrigerant flow path during heating mode operation.

Main Circuit Operation Description

Power Circuit Operation

Explanation of the main power circuit's functionality and components.

Low Voltage Power Supply

Details on the low voltage power circuit and its output voltages.

Control Circuitry

Reversing Valve (4-Way Valve) Control

Circuit operation and testing for the 4-way reversing valve.

Temperature Detection Circuitry

Explanation of thermistor circuits for temperature sensing.

Electric Expansion Valve Circuitry

Circuit operation and control of the electric expansion valve.

Outdoor DC Fan Motor Control

Circuit operation for the outdoor DC fan motor.

Power Circuit Details

Service Call Q&A

Troubleshooting Guide

Power Circuit Safety Procedures

Troubleshooting Diagnostics

Self-Diagnosis Indicator Modes

Outdoor Unit Electrical & Cycle Troubleshooting

Refrigerating Cycle Checks

Troubleshooting Procedure: Gas Leaks & Compressor

Procedure to diagnose gas leaks and compressor defects.

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