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Hitachi RAC-18WEC User Manual

Hitachi RAC-18WEC
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-18WEC Specifications

General IconGeneral
BrandHitachi
ModelRAC-18WEC
CategoryAir Conditioner
LanguageEnglish

Summary

SAFETY DURING REPAIR WORK

WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS

SPECIFICATIONS

SAFETY PRECAUTIONS

UNIT PARTS AND INDICATIONS

NAMES AND FUNCTIONS OF EACH PART

Identifies and explains unit parts and their functions.

MAINTENANCE PROCEDURES

UNIT CONSTRUCTION AND DIAGRAMS

CONSTRUCTION AND DIMENSIONAL DIAGRAM

Dimensional drawings and construction details.

WIRING DIAGRAM

Diagrams showing electrical wiring.

CIRCUIT DIAGRAM

Diagrams illustrating electrical circuits.

BLOCK DIAGRAM

Functional block diagram of the system.

MAIN PARTS AND COMPONENTS

OPERATING MODES

BASIC MODE

Explains basic operating modes.

Cooling Operations

Details cooling operation modes.

Dehumidifying Operations

Details dehumidifying operation modes.

Heating Operations

Details heating operation modes.

DISASSEMBLY AND REASSEMBLY PROCEDURES

MAIN CIRCUIT OPERATION DESCRIPTION

Indoor/Outdoor Communication Circuits

Explains communication circuits between units.

Power Supply and Control Circuits

SERVICE CALL Q&A

TROUBLESHOOTING AND INSPECTION

Inspection instructions

Important instructions for checks and troubleshooting.

POWER CIRCUIT SAFETY PROCEDURES

INDOOR UNIT ELECTRIC PARTS STRUCTURE

SELF-DIAGNOSIS AND TROUBLESHOOTING

Self-diagnosis display interpretation

Interpreting self-diagnosis displays (indoor/outdoor).

Self-diagnosis memory function

Storing and reading self-diagnosis failure modes.

Lamp blinking frequency guide

Guide to counting lamp blinking frequencies for diagnosis.

SELF-DIAGNOSIS LIGHTING MODE

SYSTEM DIAGNOSIS AND TROUBLESHOOTING

Initiating troubleshooting process

Initial steps for troubleshooting product issues.

CHECKING INDOOR UNIT ELECTRICAL PARTS

Initiating electrical parts troubleshooting

Initial steps for indoor unit electrical parts troubleshooting.

FAILURE PHENOMENON TROUBLESHOOTING

Power Not Turning On

Troubleshooting steps when the unit does not power on.

No Remote Control Signal

Diagnosing remote control signal reception issues.

Compressor Not Running

Troubleshooting steps when the compressor fails to run.

Fan Motor Not Stopping

Troubleshooting steps when the fan motor does not stop.

CHECKING OUTDOOR UNIT ELECTRICAL PARTS

REFRIGERATING CYCLE CHECK

PARTS LIST AND DIAGRAMS

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