Hitachi RAC-25WPE User Manual

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

Hitachi RAC-25WPE Specifications

General

Type	Split Air Conditioner
Cooling Capacity	2.5 kW
Heating Capacity	3.2 kW
Refrigerant	R410A
Power Supply	220-240V, 50Hz
Indoor Unit Weight	9 kg
Noise Level (Outdoor)	50 dB(A)

Summary

SPECIFICATIONS

Outdoor Unit Specifications

Detailed technical specifications for outdoor units, including power and capacity.

Component Specifications

Specifications for key components like fan motor and compressor.

SAFETY AND HANDLING PROCEDURES

Safety During Repair Work

Essential safety guidelines for technicians performing maintenance and repairs.

Semiconductor Handling Standards

Best practices for handling semiconductors to prevent damage during service.

UNIT CONSTRUCTION AND DIAGRAMS

Construction and Dimensional Diagram

Visual representation of the outdoor unit's structure and dimensions.

Wiring Diagram

Electrical connection schematics for different outdoor unit models.

Block Diagram

Functional overview of the outdoor unit's control system and components.

Refrigerating Cycle Diagram

Schematic illustrating the cooling and heating refrigerant flow.

SERVICE AND MAINTENANCE

Disassembly and Reassembly Procedure

Step-by-step guide for taking apart and reassembling the outdoor unit.

Main Circuit Operation Description

Explanation of how the main electrical circuits function within the unit.

Troubleshooting

General guidance and instructions for diagnosing and resolving issues.

Power Circuit Safety Procedures

Critical procedures for safely handling the power circuit and discharging capacitors.

DIAGNOSTICS AND TESTING

Service Call Q&A

Common customer inquiries and their solutions for operation issues.

Self-Diagnosis Modes

Detailed explanation of self-diagnosis functions and error codes.

Refrigerating Cycle Checks

Procedures for diagnosing gas leaks and compressor defects.

Outdoor Unit Test Switch Operation

Procedure for independent unit testing.

PARTS LIST AND DIAGRAM

Outdoor Unit Parts List

Comprehensive list of part numbers and descriptions for outdoor units.