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Hitachi RAC-35WEC User Manual

Hitachi RAC-35WEC
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SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT + OUTDOOR UNIT
SERVICE MANUAL
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
SPECIFICATIONS
CONTENTS
SPECIFICATIONS ------------------------------------------------------------------- 6
HOW TO USE ----------------------------------------------------------------------- 9
CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 18
MAIN PARTS COMPONENT --------------------------------------------------- 21
WIRING DIAGRAM ---------------------------------------------------------------- 23
CIRCUIT DIAGRAM --------------------------------------------------------------- 25
After installation
BLOCK DIAGRAM ----------------------------------------------------------------- 28
BASIC MODE ----------------------------------------------------------------------- 29
REFRIGERATING CYCLE DIAGRAM --------------------------------------- 39
DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 45
SERVICE CALL Q & A ---------------------------------------------------------- 70
TROUBLE SHOOTING ----------------------------------------------------------- 73
PARTS LIST AND DIAGRAM --------------------------------------------------105
HHAW
INDOOR UNITOUTDOOR UNIT
INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
RAK-18PEC RAC-18WEC
RAK-25PEC
RAK-25PECC
RAC-25WEC RAC-35WEC
RAC-10WECI RAC-14WECI
RAK-10PECI
RAK-35PEC
RAK-35PECC
RAK-14PECI
RAK-50PEC
RAK-50PECC
RAK-20PECI
RAC-50WEC
RAC-20WECI
(KW)
(B.T.U./h)
(KW)
(B.T.U./h)
W 780 660(+60) 780 660(+60) 780 660(+60) 780 792(+91)
H 280 530 280 530 280 530 280 600
D 218 278(+55) 218 278(+55) 218 278(+55) 218 299(+47)
MODEL
POWER SOURCE
TOTAL INPUT (W
TOTAL AMPERES (A)
CAPACITY
COOLING
HEATING
TOTAL INPUT (W
TOTAL AMPERES (A)
CAPACITY
1,090 (250
1,460)
DIMENSIONS
(mm)
1,560 (500 2,100)
3.19-3.05
2.00 (0.90
2.50)
6,820 (3,070
8,530)
620 (250
970)
2.50 (0.90
3.20)
3.62-3.46
7.5 24.5 7.5 24.5 7.5 27.5 40
8,530 (3,070
10,920)
880 (250
1,250)
NET WEIGHT (Kg)
TYPE
DC INVERTER
1 PHASE,50Hz ,220-230V 1 PHASE,50Hz ,220-230V 1 PHASE,50Hz ,220-230V 1 PHASE,50Hz , 220-230V
580 (
700 (250 1,290)1,010)
4.56-4.36
3.40 (0.90
4.40)
11,600 (3,070
15,010)
5.41-5.18
1,100 (250
1,700)
5.36-5.13
14,330 (3,070
17,060)
3.84-3.67
2.50 (0.90
3.10)
8,530 (3,070
10,580)
7.29-6.85
3.50 (0.90
4.00) 5.00 (1.90 5.20)
11,940 (3,070
13,650) 17,060 (6,480 17,740)
20,470 (7,510
24,910)
7.56-7.23
1,660 (500
2,750)
4.20 (0.90
5.00) 6.00 (2.20 7.30)
25
0
Hitachi Household Appliances(Wuhu) Co., Ltd.
NO. 0093E
8
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY------------- 42
L.H
RAK-18PEC/RAC-18WEC
RAK-35PEC/RAC-35WEC
RAK-50PEC/RAC-50WEC
RAK-25PEC/RAC-25WEC
RAK-35PECC/RAC-35WEC
RAK-50PECC/RAC-50WEC
RAK-25PECC/RAC-25WEC
RAK-14PECI/RAC-14WECI
RAK-20PECI/RAC-20WECI
RAK-10PECI/RAC-10WECI
RAK-18PEC
RAK-25PEC
RAK-35PEC
RAK-50PEC
RAK-25PECC
RAK-35PECC
RAK-50PECC
RAK-10PECI
RAK-14PECI
RAK-20PECI
RAC-18WEC
RAC-25WEC
RAC-35WEC
RAC-10WECI
RAC-14WECI
RAC-50WEC
RAC-20WECI

Table of Contents

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Hitachi RAC-35WEC Specifications

General IconGeneral
Cooling Capacity3.5 kW
Heating Capacity4.0 kW
RefrigerantR410A
Power Supply220-240V, 50Hz
Weight (Indoor Unit)10 kg
Weight (Outdoor Unit)32 kg
TypeSplit

Summary

Working Standards for Preventing Breakage of Semiconductors

Semiconductor Handling Practices

Details essential practices for handling semiconductors safely.

Remote Controller Functions

Remote Controller Operation Mode Selection

Select the operating mode (Heating, Dehumidifying, Cooling).

Remote Controller Time and Temperature Adjustment

Adjust time and temperature settings with the remote controller.

Remote Controller Fan Speed Adjustment

Controls fan speed using the remote controller.

Safety Precautions

Operation Safety Precautions

Safety measures to follow during normal operation of the unit.

Shipping and Maintenance Safety Precautions

Safety guidelines for handling the unit during shipping or maintenance.

Maintenance Procedures

Air Filter Maintenance

Instructions for cleaning and maintaining the air filter.

Construction and Dimensional Diagrams

Indoor Unit Construction and Dimensions

Diagrams showing the construction and dimensions of the indoor unit.

Outdoor Unit Construction and Dimensions

Diagrams showing the construction and dimensions of the outdoor unit.

Disassembly and Reassembly Procedures

Indoor Unit Front Panel Disassembly

Steps for disassembling and reassembling the front panel.

Indoor Unit Front Cover Removal

Steps for removing and reattaching the front cover.

Indoor Unit P.W.B. Handling

Procedures for handling the control and indicating P.W.B.

Outdoor Unit Disassembly

Outdoor Unit Electrical Parts Removal

Steps for disassembling electrical parts of the outdoor unit.

Main Circuit Operation Description

Control Power Circuit Operation

Explanation of the control power circuit's operation.

Service Call Q&A

Troubleshooting Guide

Power Circuit Discharge and Safety

Indoor Unit Electrical Parts Structure

Troubleshooting Support: Self-Diagnosis

Troubleshooting Support: Self-Diagnosis Display Function

Self-Diagnosis Lighting Mode

Forced Cooling Operation

Diagnosis and Troubleshooting

Troubleshooting: No Power On

Troubleshooting steps when the unit fails to power on.

Troubleshooting: No Remote Control Signal

Troubleshooting steps for remote control signal reception issues.

Troubleshooting: Compressor Not Running

Troubleshooting steps when the compressor fails to run.

Troubleshooting: Fan Motor Not Stopping

Troubleshooting steps when the fan motor does not stop.

Checking Outdoor Unit Electrical Parts

Checking the Refrigerating Cycle

Refrigerating Cycle Troubleshooting Procedure

Procedure for checking refrigerating cycle when unit is not operating.

Outdoor Unit Test Switch Operation

Independent Outdoor Unit Operation

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