Hitachi RAC-VJ18PHAE - User Manual

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
OUTDOOR UNIT
SERVICE MANUAL
TECHNICAL INFORMATION
SPECIFICATIONS
OUTDOOR UNIT
RAC-VJ18PHAE
RAC-VJ25PHAE
RAC-VJ35PHAE
RAC-VJ42PHAE
RAC-VJ50PHAE
Johnson Controls-Hitachi Air Conditioning Wuhu Co., Ltd.
FOR SERVICE PERSONNEL ONLY
REFER TO THE FOUNDATION MANUAL
CONTENTS
SPECIFICATIONS ----------------------------------------------------------------- 6
CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 8
MAIN PARTS COMPONENT -------------------------------------------------- 10
WIRING DIAGRAM --------------------------------------------------------------- 12
BLOCK DIAGRAM ---------------------------------------------------------------- 15
REFRIGERATING CYCLE DIAGRAM --------------------------------------- 16
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY------------- 18
DESCRIPTION OF MAIN CIRCUIT OPERATION ------------------------ 20
SERVICE CALL Q & A ----------------------------------------------------------- 37
TROUBLE SHOOTING ----------------------------------------------------------- 39
PARTS LIST AND DIAGRAM -------------------------------------------------- 52
NO.0148E
JCH-WH
After installation
The performance tests are based on the EN14511、EN14825.
RAC-VJ18PHAE
RAC-VJ25PHAE
RAC-VJ35PHAE
RAC
-VJ42PHAE
RAC-VJ50PHAE
INDOOR UNIT OUTDOOR UNIT INDOOR UNIT INDOOR UNIT
RAK-VJ35PHAE RAC-VJ35PHAE RAK-VJ42PHAE RAK-VJ50PHAE
780
7500(+60)
780 780
280 548 280 280
227
288(+55)
227 227
8.6 31.6 8.8 8.8
DC INVERTER
6.50-7.09
6.00 (2.20 7.30)
20,470 (7,510 24,910)
792(+91)
600
299(+47)
OUTDOOR UNIT
RAC-VJ50PHAE
1 PHASE,50Hz, 220-240V
1,471 (500 2,100)
6.14-6.69
5.00 (1.90 5.20)
17,060 (6,480 17,740)
1,558 (500 2,750)
299(+47)
NET WEIGHT (Kg)
8.6 31.6 8.6 39.5
792(+91)
H
280 548 280 600
(B.T.U./h) 8,530 (3,070 10,920) 11,600 (3,070 15,010) 14,330 (3,070 17,060) 18,430 (5,800 20,470)
DIMENSIONS
(mm)
W
780
750(+60)
780
2.93-2.81 3.87-3.71 5.05-4.63 5.49-5.99
CAPACITY
(KW) 2.50 (0.90 3.20) 3.40 (0.90 4.40) 4.20 (0.90 5.00) 5.40 (1.70 6.00)
8,530 (3,070 10,580) 11,940 (3,070 13,650) 14,330 (5,800 17,060)
HEATING
TOTAL INPUT (W) 519 (250 970) 733 (250 1,250) 1,000 (250 1,700) 1,317 (500 2,300)
TOTAL AMPERES (A)
4.35-3.98 4.68-5.10
CAPACITY
(KW) 2.00 (0.90 2.50) 2.50 (0.90 3.10) 3.50 (0.90 4.00) 4.20 (1.70 5.00)
(B.T.U./h) 6,820 (3,070 8,530)
POWER SOURCE 1 PHASE,50Hz,220-240V 1 PHASE,50Hz,220-240V 1 PHASE,50Hz,220-240V 1 PHASE,50Hz, 220-240V
COOLING
TOTAL INPUT (W) 419 (250 1,010) 549 (250 1,290) 875 (250 1,460)
OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
MODEL RAK-VJ18PHAE RAC-VJ18PHAE RAK-VJ25PHAE RAC-VJ42PHAE
31.6 39.5
288(+55)D
227
288(+55)
227
548
750(+60)
1,120 (500 1,800)
TOTAL AMPERES (A) 2.46-2.35 3.08-2.95
RAC-VJ25PHAE
OUTDOOR UNIT
TYPE
INDOOR UNIT
- 1 -

Summary

Safety During Repair Work

Working Standards for Preventing Semiconductor Breakage

Important Cautions

Technical Specifications

Construction and Dimensional Diagram

Outdoor Unit Dimensions (VJ18-35 PHAE)

Dimensional diagrams and installation space requirements for outdoor units.

Outdoor Unit Dimensions (VJ42-50 PHAE)

Dimensional diagrams and installation space requirements for outdoor units.

Main Parts Component Overview

Fan Motor Specifications

Technical details and specifications for the fan motor.

Outdoor Unit Electric Components

Key electrical components and their resistance values for outdoor units.

Compressor Motor Details

Compressor Motor Specifications

Specifications, connection diagrams, and resistance values for compressor motors.

Wiring Diagram

Outdoor Unit Wiring Diagram

Electrical wiring schematic for the outdoor unit.

Block Diagram

Outdoor Unit Block Diagram

Functional block diagram of the outdoor unit's control system.

Refrigerating Cycle Diagram

Refrigerating Cycle (VJ18-35 PHAE)

Refrigerating cycle diagrams for cooling and heating modes.

Refrigerating Cycle (VJ42-50 PHAE)

Refrigerating cycle diagrams for cooling and heating modes.

Procedure for Disassembly and Reassembly

Outdoor Unit Disassembly Steps

Steps for disassembling and reassembling the outdoor unit's electrical parts.

Description of Main Circuit Operation

Power Circuit Operation

Explanation of the main power circuit operation and key components.

Low Voltage Power Circuit

Main Parts and Power Circuit P.W.B.

Power Circuit P.W.B. Specifications

Details on power circuit P.W.B. voltage specifications and failure modes.

Reversing Valve (4-way Valve) Control Circuit

Temperature Detection Circuit

Electric Expansion Valve Circuit

Outdoor DC Fan Motor Control Circuit

Main Circuit Operation Description (VJ42-50 PHAE)

Power Circuit Operation (VJ42-50 PHAE)

Explanation of the main power circuit operation and key components.

Low Voltage Power Circuit (VJ42-50 PHAE)

Main Parts and Power Circuit P.W.B. (VJ42-50 PHAE)

Power Circuit P.W.B. Specifications (VJ42-50 PHAE)

Details on power circuit P.W.B. voltage specifications and failure modes.

Reversing Valve Control Circuit (VJ42-50 PHAE)

Temperature Detection Circuit (VJ42-50 PHAE)

Electric Expansion Valve Circuit (VJ42-50 PHAE)

Outdoor DC Fan Motor Control Circuit (VJ42-50 PHAE)

Service Call Q&A

Cooling Operation Q&A

Troubleshooting common issues during cooling operation.

Dehumidification Q&A

Troubleshooting common issues during dehumidification operation.

Heating Operation Q&A

Troubleshooting common issues during heating operation.

Defrost & Automatic Operation Q&A

Information on defrost and automatic operation modes.

Common Operational Issues

Automatic Mode & Noise Troubleshooting

Explains fan speed changes, startup noise, and temperature control issues.

Startup and Mold Control Issues

Covers initial wind production and mold control troubleshooting.

Troubleshooting Guide

Inspection Instructions

General instructions and warnings for inspection and troubleshooting procedures.

Power Circuit Discharge Procedure

Connector Handling Instructions

Receptacle Handling Procedures

Proper methods for detaching and reattaching connectors and receptacles.

Board Connector Handling Precautions

Warning against handling connectors while the unit is energized.

Troubleshooting Support Features

Outdoor Unit Failure Display

Information on failure modes displayed on the outdoor unit via LD301.

Self-diagnosis Memory Function

Details on storing and retrieving failure modes in memory.

Self-Diagnosis Lighting Mode

LED Status and Wiring Diagrams

Explains LD301 LED status, wiring, and diagnosis methods.

Fan Motor Diagnosis Methods

Specific diagnosis methods for the outdoor fan motor.

Outdoor Unit Electrical Parts Check

Self-Diagnosis Error Code Flowchart

Refrigerating Cycle Troubleshooting

Outdoor Unit Test Switch Operation

Independent Outdoor Unit Operation

Parts List and Diagram

Parts List (VJ18-35 PHAE)

Illustrated parts list for specific outdoor unit models.

Parts List (VJ42-50 PHAE)

Illustrated parts list for specific outdoor unit models.

Hitachi RAC-VJ18PHAE Specifications

General

Capacity	1.5 Ton
Star Rating	3 Star
Refrigerant	R-32
Power Supply	230V, 50Hz, 1 Phase
Noise Level (Outdoor)	50 dB
Weight (Indoor Unit)	11 kg
Type	Split