Hitachi RAK-18NH6 - User Manual

NO. 0355E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT
MARCH 2007 Refrigeration & Air-Conditioning Division
SERVICE MANUAL
PM
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
(W)
(A)
(kW)
(B.T.U./h)
(W)
(A)
(kW)
(B.T.U./h)
W
H
D
(kg)
DC INVERTER (WALL TYPE)
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
CAPACITY
TOTAL INPUT
TOTAL AMPERES
CAPACITY
DIMENSIONS
(mm)
NET WEIGHT
SPECIFICATIONS
CONTENTS
SPECIFICATIONS ----------------------------------------------------- 5
HOW TO USE -------------------------------------------------------- 14
CONSTRUCTION AND DIMENSIONAL DIAGRAM ------- 38
MAIN PARTS COMPONENT ------------------------------------- 39
WIRING DIAGRAM -------------------------------------------------- 40
CIRCUIT DIAGRAM ------------------------------------------------- 43
PRINTED WIRING BOARD LOCATION DIAGRAM ------- 45
BLOCK DIAGRAM --------------------------------------------------- 47
BASIC MODE --------------------------------------------------------- 49
REFRIGERATING CYCLE DIAGRAM ------------------------- 63
AUTO SWING FUNCTION ---------------------------------------- 65
DESCRIPTION OF MAIN CIRCUIT OPERATION --------- 66
SERVICE CALL Q & A -------------------------------------------- 71
PARTS LIST AND DIAGRAM ------------------------------------ 81
RAK-18NH6
RAK-25NH6
RAK-35NH6
RAK-50NH6
COOLING
HEATING
780
280
220
RAK-18NH6
RAK-25NH6
RAK-35NH6
RAK-50NH6
RAK-35NH6
1 PHASE, 50 Hz, 220-240V
REFER TO THE SPECIFICATION PAGE (6)
INDOOR UNIT
RAK-18NH6 RAK-25NH6
NOTE:
This manual describes only points that differ from
RAF-25, 35NH5, RAD-25, 35NH5, RAI-25, 35NH5
and RAM-55QH5 (PM No. 0312E) for items not
described in this manual.
9.59.0
HITACHI
DC INVERTER
T
E
M
P
O
R
A
R
Y
S
W
IT
C
H
9.5 9.5
RAK-50NH6

Summary

Safety During Repair Work

Working Standards for Preventing Breakage of Semiconductors

Guidelines for handling semiconductors to prevent damage during maintenance.

Safety Precaution

Precautions During Installation

Safety guidelines for installing the air conditioner unit.

Precautions During Shifting or Maintenance

Safety advice for moving and maintaining the unit.

Precautions During Operation

Safety instructions for operating the air conditioner.

Names and Functions of Each Part

Names and Functions of Remote Control Unit

Heating Operation

Cooling Operation

How to Set the Timer

Maintenance

1. Air Filter

Procedure for cleaning the air filter to maintain performance.

2. Washable Front Panel

Instructions for cleaning the washable front panel.

Regular Inspection

Construction and Dimensional Diagram

Main Parts Component

Details of major components like thermostat and fan motor.

Wiring Diagram

Circuit Diagram

Basic Mode

Refrigerating Cycle Diagram

Service Call Q & A

Troubleshooting When Timer Lamp Blinks

Checking Indoor Unit Electrical Parts

Flowchart for checking indoor unit electrical parts when power is off.

Checking the Remote Controller

Procedure for Disassembly and Reassembly

Hitachi RAK-18NH6 Specifications

General

Brand	Hitachi
Model	RAK-18NH6
Category	Air Conditioner
Language	English