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Hitachi RAC-35WPB User Manual

Hitachi RAC-35WPB
148 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 ----------------------------------------------------------------------10
CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 43
MAIN PARTS COMPONENT --------------------------------------------------- 48
WIRING DIAGRAM ---------------------------------------------------------------- 50
CIRCUIT DIAGRAM --------------------------------------------------------------- 52
After installation
BLOCK DIAGRAM ----------------------------------------------------------------- 55
BASIC MODE ----------------------------------------------------------------------- 56
REFRIGERATING CYCLE DIAGRAM --------------------------------------- 67
DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 73
SERVICE CALL Q & A ---------------------------------------------------------- 98
TROUBLE SHOOTING -----------------------------------------------------------102
PARTS LIST AND DIAGRAM --------------------------------------------------1
HHAW
RAK-18PPB/RAC-18WPB
RAK-25PPB/RAC-25WPB
RAK-35PPB/RAC-35WPB
RAK-50PPB/RAC-50WPB
INDOOR UNITOUTDOOR UNIT
INDOOR UNIT
OUTDOOR UNIT
INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
INDOOR UNIT OUTDOOR UNIT
RAK-18P
RAC-18W
RAK-25P RAC-25W RAK-35P RAC-35W
RAK-50P RAC-50W
(KW)
(B.T.U./h)
(KW)
(B.T.U./h)
W
780 660(+60) 780 660(+60) 900 750(+65)
900 792(+91)
H
280 530 280 530 295 548
295 600
D
218 278(+35) 218 278(+35) 230
288(+27.5)
230 299(+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)
3.12-2.97
2.00 (0.90
2.50)
8,530 (3,070
10,580)
580 (250
970)
2.50 (0.90
27.57.5 27.57.5 3410
10
3.20)
3.49-3.34
11,600 (3,070
15,010)
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
550 (
700 (250
) 010 , 1
1,290)
4.56-4.36
3.40 (0.90
4.40)
11,600 (3,070
15,010)
4.87-4.66
1,100 (250
1,700)
5.51-5.27
14,330 (3,070
17,060)
3.75-3.59
2.50 (0.90
3.10)
8,530 (3,070
10,580)
7.30-6.98
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)
7.93-7.59
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.
PB
PB
PB PB PB PB
PB PB
RAC-18WPB
RAC-25WPB
RAK-18PPB
RAK-25PPB
RAC-50WPB
RAC-35WPB
1 PHASE,50HZ,220-230V
RAK-35PPB
RAK-50PPB
NO.0080E-3
38
40
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY-------------70
RAR-5E2
RAR-5E1

Table of Contents

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Hitachi RAC-35WPB Specifications

General IconGeneral
Cooling Capacity3.5 kW
Heating Capacity4.0 kW
RefrigerantR410A
Power Supply220-240V, 50Hz
Weight (Indoor Unit)10 kg
TypeSplit Air Conditioner
Noise Level (Outdoor)52 dB(A)

Summary

SAFETY DURING REPAIR WORK

WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS

Scope

Defines the applicability of semiconductor handling standards.

Object parts

Lists semiconductor components covered by the standards.

Items to be observed in handling

Provides guidelines for safe handling of semiconductor parts.

SPECIFICATIONS

Remote Controller Manual

PREPARATION BEFORE OPERATION

Instructions for initial setup of the remote controller, including battery installation and mounting.

NAMES AND FUNCTIONS OF REMOTE CONTROLLER

REMOTE CONTROLLER

Overview of the remote control unit's range and handling.

START/STOP button

Button to start or stop the air conditioner operation.

FAN SPEED selector Button

Button to adjust the fan speed settings.

ECO Button

Button to activate the energy-saving ECO operation mode.

VARIOUS FUNCTIONS

AUTOMATIC OPERATION

Explains how the unit automatically selects heating or cooling mode based on room temperature.

Auto Restart Control

Describes the unit's behavior after a power failure, resuming previous operation.

MODE SELECTOR

Button to cycle through operating modes like AUTO, HEAT, COOL, FAN.

POWERFUL Button

Button to activate the maximum power operation mode.

SILENT Button

Button to set the unit to silent operation mode.

LEAVE HOME Button

Button to set the unit for unoccupied home operation.

ECO SLEEP TIMER Button

Button to set the ECO sleep timer function.

SLEEP TIMER Button

Button to set the sleep timer function.

HEATING OPERATION

Defrosting

Explains the defrosting process that occurs during heating operation.

DEHUMIDIFYING OPERATION

Dehumidifying Function

Details how the unit performs dehumidification based on room temperature.

COOLING OPERATION

FAN OPERATION

AUTO SWING OPERATION

To start Vertical Auto Swing

Steps to initiate the vertical auto swing function for the air deflector.

POWERFUL OPERATION

To start POWERFUL operation

Instructions to activate the maximum power operation mode.

SILENT OPERATION

To start SILENT operation

Steps to activate the silent operation mode for reduced fan noise.

ECO OPERATION

To start ECO operation

Instructions to activate the energy-saving ECO operation.

LEAVE HOME(LH) OPERATION

To start LEAVE HOME operation

Steps to set the unit for maintaining a minimum temperature when the home is unoccupied.

CLEAN (ONE TOUCH CLEAN) OPERATION

To start CLEAN operation

Instructions to initiate the self-cleaning cycle for the indoor heat exchanger.

ONCE TIMER (ON/OFF TIMER) OPERATION

OFF TIMER

Instructions for setting the unit to turn off at a specific time.

ON TIMER

Instructions for setting the unit to turn on at a specific time.

ECO SLEEP TIMER OPERATION

To start ECO SLEEP TIMER operation

Steps to activate the ECO sleep timer for energy saving.

WEEKLY TIMER OPERATION

How to set a WEEKLY TIMER.

Detailed steps for programming a weekly timer schedule for the unit.

INFO FUNCTION

To check temperature around remote controller

How to view the ambient temperature measured by the remote controller.

To check monthly power consumption

Steps to display the unit's monthly power consumption data.

OPERATION MODE LOCK

Method to lock HEATING mode (including FAN) operation.

Procedure to lock the remote controller to HEATING mode only.

SAFETY PRECAUTION

NAMES AND FUNCTIONS OF EACH PART

INDOOR UNIT

Identifies and describes the components of the indoor unit.

OUTDOOR UNIT

Identifies and describes the components of the outdoor unit.

MAINTENANCE

AIR FILTER

Instructions for cleaning and maintaining the air filter.

CLEANING OF FRONT PANEL

Steps for cleaning the front panel of the indoor unit.

INFORMATION

CAPABILITIES

Details the heating, cooling, and dehumidifying capabilities of the unit.

REGULAR INSPECTION

AFTER SALES SERVICE AND WARRANTY

Information regarding after-sales service and warranty conditions.

CONSTRUCTION AND DIMENSIONAL DIAGRAM

INDOOR UNIT

Provides detailed dimensions and construction diagrams for the indoor unit.

OUTDOOR UNIT

Provides dimensions and construction for the outdoor unit (RAC-18/25WPB).

OUTDOOR UNIT

Provides dimensions and construction for the outdoor unit (RAC-35WPB).

OUTDOOR UNIT

Provides dimensions and construction for the outdoor unit (RAC-50WPB).

MAIN PARTS COMPONENT

Thermostat Specifications

Lists thermostat specifications for different models and operation modes.

FAN MOTOR

Provides specifications for the fan motor, including output and connection details.

COMPRESSOR MOTOR

Compressor Motor Specifications

Details the specifications for the compressor motor, including resistance values.

WIRING DIAGRAM

OUTDOOR UNIT

Wiring diagram for the outdoor unit.

WIRING DIAGRAM OF THE PRINTED WIRING BOARD

CIRCUIT DIAGRAM

BLOCK DIAGRAM

BASIC MODE

REFRIGERATING CYCLE DIAGRAM

Procedure for Disassembly and Reassembly

INDOOR UNIT RAK-18/25/35/50PPB

Steps for disassembling and reassembling the indoor unit's front panel and covers.

DESCRIPTION OF MAIN CIRCUIT OPERATION

Control power circuit

Explains the operation of the control power circuit, including fuse and varistor functions.

Reset Circuit

Details the function of the reset circuit for initializing the microcomputer.

Drive circuit of the indoor fan motor

Explains the operation and components of the indoor fan motor drive circuit.

Remote control reception circuit

Explains the circuit that receives signals from the remote control.

Dip-switch

Explains the function and settings of the dip switches.

Indoor/outdoor communication circuits

Describes the communication circuits between indoor and outdoor units.

Power Circuit

Details the main power circuit, including key components like IPM and diode stacks.

Power circuit (Low voltage)

Explains the low voltage power supply circuits for various components.

Reversing valve control circuit

Describes the control circuit for the reversing valve in different operation modes.

Temperature Detection Circuit

Explains the circuits that detect indoor and outdoor temperatures.

Electric expansion valve circuit

Details the circuit for controlling the electric expansion valve.

Outdoor DC fan motor control circuit

Explains the control circuit for the outdoor DC fan motor.

TROUBLE SHOOTING

Inspection instructions

Guidelines for performing inspections when troubleshooting the unit.

DISCHARGE, PROCEDURE AND POWER SHUT OFF METHOD FOR POWER CIRCUIT

STRUCTURE OF AN INDOOR UNIT ELECTRIC PARTS

Removing electrical parts

Steps for removing electrical components from the indoor unit.

Removing control P.W.B.

Procedure for removing the main control printed wiring board.

Other instructions

Do not detach or reattach the connectors while energized

Critical warning against handling connectors while the unit is powered.

Troubleshooting support

Self-diagnosis display [Display on the indoor unit side]

How to interpret self-diagnosis information displayed by the indoor unit's timer lamp.

[Display on the outdoor unit side]

How to interpret self-diagnosis information indicated by the outdoor unit's LD301 lamp.

Self-diagnosis memory

Information on how the unit stores and retrieves failure modes.

SELF-DIAGNOSIS LIGHTING MODE

Forced cooling operation

Temporary operation switch

Describes the function of the temporary operation switch for manual control.

Diagnosis and troubleshooting of indoor electric parts, outdoor electric parts and refrigerating cycle

Initiating troubleshooting

Initial diagnostic steps.

Checking the indoor unit electrical parts

Initiating troubleshooting

Steps to troubleshoot indoor unit electrical issues.

Failure phenomenon: The power will not become turned on.

Initiating troubleshooting

Diagnostic steps for when the unit does not power on.

Failure phenomenon: The product will not receive a remote control signal.

Initiating troubleshooting

Diagnostic steps for when the remote control signal is not received.

How to identify sources of jamming in the reception of remote control signals

Failure phenomenon: The compressor will not run.

Initiating troubleshooting

Diagnostic steps for compressor not running.

Failure phenomenon: The fan motor will not stop.

Initiating troubleshooting

Diagnostic steps for fan motor not stopping.

Timer lamp blinking: blinking once

Timer lamp blinking: blinking twice

Timer lamp blinking: blinking three times

Timer lamp blinking: blinking four times

Timer lamp blinking: blinking 9 times

Initiating troubleshooting

Diagnostic steps for 9 blinks.

Timer lamp blinking: blinking 10 times

Initiating troubleshooting

Diagnostic steps for 10 blinks.

Timer lamp blinking: blinking 12 times

Initiating troubleshooting

Diagnostic steps for 12 blinks.

Timer lamp blinking: blinking 13 times

Checking the electrical parts of the outdoor unit

HOW TO CHANGE THE SHIFT VALUE SETTING TEMPERATURE

SETTING THE PREVENTION OF MUTUAL INTERFERENCE FOR REMOTE CONTROLLER

OPERATION MODE SETTING

DISPLAY OPERATION MODE SETTING

CHECKING THE REFRIGERATING CYCLE

Troubleshooting procedure (No operation, No heating, No cooling)

Procedure to troubleshoot issues related to refrigerating cycle problems.

How to run the product with the outdoor unit test switch

HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY

PARTS LIST AND DIAGRAM

INDOOR UNIT MODEL: RAK-18/25PPB

Part list and exploded diagram for the RAK-18/25PPB indoor unit.

INDOOR UNIT

Part list for the RAK-35/50PPB indoor unit.

OUTDOOR UNIT

Part list and exploded diagram for the RAC-18/25WPB outdoor unit.

OUTDOOR UNIT

Part list and exploded diagram for the RAC-35WPB outdoor unit.

OUTDOOR UNIT

Part list and exploded diagram for the RAC-50WPB outdoor unit.

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