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Hitachi RAC-25WEC User Manual

Hitachi RAC-25WEC
113 pages
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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-25WEC Specifications

General IconGeneral
BrandHitachi
ModelRAC-25WEC
CategoryAir Conditioner
LanguageEnglish

Summary

Specifications

Safety During Repair Work

Working Standards for Preventing Breakage of Semiconductors

3. Items to be Observed in Handling

Guidelines for handling semiconductors, including containers, body earth, and grounding.

Names and Functions of Remote Controller

Adjusting the Airflow Direction

Safety Precaution

Precautions During Installation

Safety measures to follow during the installation of the unit.

Precautions During Repair or Maintenance

Safety guidelines for performing repair or maintenance work on the unit.

Precautions During Operation

Safety measures to be observed while the unit is in operation.

Wiring Diagram

Circuit Diagram

Basic Mode

Basic Cooling Operation

Cooling Powerful Operation

Dehumidifying

Basic Heating Operation

Refrigerating Cycle Diagram

Procedure for Disassembly and Reassembly

Trouble Shooting

Inspection Instructions

Instructions for performing inspections on the outdoor unit's electrical parts.

Discharge, Procedure and Power Shut Off Method for Power Circuit

Troubleshooting Support

Self-diagnosis Display [Display on the Indoor Unit Side]

How the indoor unit displays self-diagnosis information via timer lamp blinking.

Self-diagnosis Memory

Details on storing and reading self-diagnosis failure modes in memory.

Self-Diagnosis Lighting Mode

Forced Cooling Operation

Diagnosis and Troubleshooting of Indoor Electric Parts, Outdoor Electric Parts and Refrigerating Cycle

Troubleshooting by Using the Self-diagnosis Memory Function

Using self-diagnosis memory to check outdoor electrical parts failures on the indoor unit side.

Checking the Indoor Unit Electrical Parts

1. Failure Phenomenon: The Power Will Not Become Turned On.

2. Failure Phenomenon: The Product Will Not Receive a Remote Control Signal.

3. Failure Phenomenon: The Compressor Will Not Run.

4. Failure Phenomenon: The Fan Motor Will Not Stop.

Checking the Electrical Parts of the Outdoor Unit

Checking the Refrigerating Cycle (Judging Between Gas Leakage and Compressor Defective)

1. Troubleshooting Procedure (No Operation, No Heating, No Cooling)

Procedure for troubleshooting when the unit has no operation, heating, or cooling.

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