Hitachi RAK-35RXD - User Manual

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR 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 --------------------- 29
MAIN PARTS COMPONENT --------------------------------------------------- 30
WIRING DIAGRAM ---------------------------------------------------------------- 31
CIRCUIT DIAGRAM --------------------------------------------------------------- 33
After installation
BLOCK DIAGRAM ----------------------------------------------------------------- 35
BASIC MODE ----------------------------------------------------------------------- 36
REFRIGERATING CYCLE DIAGRAM --------------------------------------- 47
DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 51
SERVICE CALL Q & A ---------------------------------------------------------- 61
INDOOR UNIT
INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
RAK-25R RAC-25W RAK-35R RAC-35W RAK-50R RAC-50W
(KW)
(B.T.U./h)
(KW)
(B.T.U./h)
W
295
210
11
792(+65)
600
299(+27.5)
37.5
H
D
MODEL
POWER SOURCE
TOTAL INPUT (W)
TOTAL AMPERES (A)
CAPACITY
COOLING
HEATING
TOTAL INPUT (W
TOTAL AMPERES (A)
CAPACITY
814 (250 1,400)
DIMENSIONS
(mm)
1,397 (500 2,100)
593 (250 1,200)
NET WEIGHT (Kg)
TYPE
DC INVERTER
1 PHASE,50Hz,220-230V 1 PHASE,50Hz,220-230V 1 PHASE,50Hz,220-230V
481 (250 1,000)
2.73-2.61
3.20 (0.90
4.20)
10,920 (3,070
14,330)
3.74-3.57
3.67-3.51
14,330 (3,070
16,380)
2.92-2.79
2.50 (0.90
3.10)
8,530 (3,070
10,580)
6.36-6.09
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)
6.44-6.16
1,415 (500 2,700)
4.00 (0.90
4.80) 5.80 (2.20 7.00)
XD XD XD XD XD XD
RAK-35RXD
RAK-25RXD
RAK-18QXD
RAK-50RXD
295
210
11
792(+65)
600
299(+27.5)
37.5
900
295
210
11
800(+63)
736
350(+35.5)
51
RAK-35RXD
RAK-50RXD
RAK-18QXD
RAK-25RXD
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY------------- 49
RAK-18QXD RAK-25RXD RAK-35RXD RAK-50RXD
-
RAC-25WXD RAC-35WXD RAC-50WXD
RAM-33NP2B
o o
- -
RAM-40NP2B
o o o
-
RAM-53NP2B
o o o o
RAM-53NP3B
o o o o
RAM-68NP3B
o o o o
RAM-70NP4B
o o o o
RAM-90NP5B
o o o o
RAM-110NP6B
o o o o
Single outdoor unit
Multi
outdoor
unit
Indoor unit
This manual describes only points that differ from
RAC-25WXD,RAC-35WXD,RAC-50WXD（JCH-WH NO.0112E）
for items not described in this manual.
800 (250 1,600)
RAM-33NP2B（PM NO.0581E）
RAM-40NP2B（PM NO.0582E）
RAM-53NP2B,RAM-53NP3B（PM NO.0583E）
RAM-110NP6B
（PM NO.0584E）RAM-68NP3B
（PM NO.0585E）RAM-70NP4B
（PM NO.0586E）RAM-90NP5B
（PM NO.0587E）
PARTS LIST AND DIAGRAM --------------------------------------------------
VARIOUS SETTINGS ----------------------------------------------------------------- 71
900900
NO.0111E
90
JCH-WH
Johnson Controls-Hitachi Air Conditioning Wuhu Co., Ltd.
- 1 -

Summary

SPECIFICATIONS

MAIN PARTS COMPONENT

THERMOSTAT (Room temperature Thermistor)

Details on the room temperature sensor and its specifications.

FAN MOTOR

Specifications for the indoor unit's fan motor.

WIRING DIAGRAM

CIRCUIT DIAGRAM

BLOCK DIAGRAM

BASIC MODE

Basic Cooling Operation

Cooling Defrost

Cooling Powerful Operation

Cooling Sleep Operation

Dehumidifying

Dehumidifying Powerful Operation

Dehumidifying Sleep Operation

Basic Heating Operation

Setting Defrosting Inhibit Period

Reversing valve defrosting

REFRIGERATING CYCLE DIAGRAM

Procedure for Disassembly and Reassembly

DESCRIPTION OF MAIN CIRCUIT OPERATION

Control power circuit

Details of the circuit providing power to the control systems.

Initial Setting Circuit

Initial Setting Circuit (IC531)

Details on the circuit for initial setup and data storage.

Initial Setting Circuit (IC531 and IC532) - For RAK-18 QXD only

Specific initial setting circuit for the RAK-18QXD model.

Dip-switch

Indoor;outdoor communication circuits

SERVICE CALL Q&A

STRUCTURE OF AN INDOOR UNIT ELECTRIC PARTS

Troubleshooting support

Self-Diagnosis Display Overview

How to interpret error codes shown by indoor/outdoor unit indicators.

Self-Diagnosis Memory

Introduction to accessing stored failure history.

SELF-DIAGNOSIS MEMORY FUNCTION

Forced cooling operation (Only single connection)

HOW TO CHANGE THE SHIFT VALUE SETTING TEMPERATURE

SETTING THE PREVENTION OF MUTUAL INTERFERENCE FOR REMOTE CONTROLLER

OPERATION MODE LOCK SETTING

DISPLAY OPERATION MODE SETTING

HOW TO CHANGE THE INTERMITTENT FAN CONTROL SETTING

HOW TO CHANGE THE FAN SPEED IN COOLING MODE DURING THERMO OFF

Diagnosis and troubleshooting of indoor electric parts

Troubleshooting by using the self-diagnosis memory function

Using memory data to diagnose intermittent faults.

Checking the indoor unit electrical parts

Failure phenomenon: The power will not become turned on.

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

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

Failure phenomenon: The compressor will not run.

Failure phenomenon: The fan motor will not stop.

Failure phenomenon:The eco sensor lamp is blinking(on for 4 seconds,off for 1 second)

Human infrared sensor checking points

Specific checks for the infrared sensor's functionality and environment.

Timer lamp blinking: blinking once

Timer lamp blinking: blinking twice

Timer lamp blinking: blinking three times

Timer lamp blinking: blinking 9 times

Timer lamp blinking: blinking 10 times

Timer lamp blinking: blinking 12 times

Timer lamp blinking: blinking 13 times

PARTS LIST AND DIAGRAM

Hitachi RAK-35RXD Specifications

General

Cooling Capacity	3.5 kW
Heating Capacity	4.0 kW
Energy Efficiency Class Cooling	A++
Energy Efficiency Class Heating	A+
Refrigerant	R32
Power Supply	220-240V, 50Hz
Indoor Unit Weight	9.5 kg
Noise Level (Outdoor Unit)	50 dB(A)
Type	Split System
Outdoor Unit Dimensions (W x H x D)	780 x 540 x 269 mm
Noise Level (Indoor Unit)	21 dB(A)
Air Flow (Indoor Unit)	650 m³/h