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Hitachi RAS-70YH7 - User Manual

Hitachi RAS-70YH7
92 pages
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NO. 0465E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT + OUTDOOR UNIT
JANUARY 2010
Refrigeration & Air-Conditioning Division
SERVICE MANUAL
PM
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
SPECIFICATIONS
RAS-70YH7
CONTENTS
CAUTION ----------------------------------------------------------------- 4
SPECIFICATIONS ----------------------------------------------------- 5
INSTALLATION --------------------------------------------------------- 6
HOW TO USE ---------------------------------------------------------- 7
CONSTRUCTION AND DIMENSIONAL DIAGRAM ------- 29
MAIN PARTS COMPONENT ------------------------------------- 31
WIRING DIAGRAM -------------------------------------------------- 33
CIRCUIT DIAGRAM ------------------------------------------------- 35
PRINTED WIRING BOARD LOCATION DIAGRAM ------- 41
BLOCK DIAGRAM --------------------------------------------------- 44
BASIC MODE --------------------------------------------------------- 45
REFRIGERATING CYCLE DIAGRAM ------------------------- 59
DESCRIPTION OF MAIN CIRCUIT OPERATION --------- 61
SERVICE CALL Q & A -------------------------------------------- 74
TROUBLE SHOOTING --------------------------------------------- 78
PARTS LIST AND DIAGRAM ------------------------------------ 98
RAS-70YH7/RAC-70YH7
After installation
RAC-70YH7
(W)
(A)
(kW)
(B.T.U./h)
(W)
(A)
(kW)
(B.T.U./h)
W
H
D
(kg)
(WALL TYPE)
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
CAPACITY
TOTAL INPUT
TOTAL AMPERES
CAPACITY
DIMENSIONS
(mm)
NET WEIGHT
COOLING
HEATING
OUTDOOR UNIT
RAC-70YH7
INDOOR UNIT
RAS-70YH7
1150
333
245
15
1 Ø, 50/60 Hz, 220-240V
2,170 (200 – 2,820)
9.95
7.00 (1.50 – 8.00)
23,900 (5,120 – 27,315)
2,200 (200 – 2,970)
10.10
8.00 (1.50 – 9.20)
27,300 (5.119 – 31,396)
850
800
298
55
HITACHI

Questions and Answers

  • M
    Michael GarciaAug 6, 2025
    Why is my Hitachi Air Conditioner showing an indoor/outdoor interface defect?
    • B
      Brenda RoblesAug 6, 2025
      An indoor/outdoor interface defect in your Hitachi Air Conditioner typically occurs when the interface signal from the outdoor unit is interrupted. This could be due to a problem with the indoor or outdoor interface circuit.
  • E
    Eddie SchaeferAug 14, 2025
    Why is my Hitachi RAS-70YH7 Air Conditioner's outdoor unit in forced operation?
    • M
      Marco BaldwinAug 14, 2025
      The outdoor unit of your Hitachi Air Conditioner may be in forced operation or balancing operation after forced operation due to electrical parts in the outdoor unit.
  • R
    Rachel HamiltonAug 21, 2025
    What does it mean if the reversing valve is defective in my Hitachi Air Conditioner?
    • T
      terrellbrandiAug 21, 2025
      A defective reversing valve in your Hitachi Air Conditioner means that the indoor heat exchanger temperature is too low in the heating mode or too high in the cooling mode.
  • J
    jacksonedwinAug 28, 2025
    What causes an IC401 or IC402 data reading error in Hitachi Air Conditioner?
    • U
      uallenAug 29, 2025
      An IC401 or IC402 data reading error in your Hitachi Air Conditioner occurs when data read from IC401 or IC402 is incorrect, indicating that IC401 or IC402 may be abnormal.

Summary

Essential Safety Precautions

Safety During Repair Work

Critical safety guidelines for personnel performing repairs on the unit.

Semiconductor Handling Standards

Standards for preventing semiconductor damage during maintenance.

Component Identification

Indoor Unit Parts

Identification and functions of the indoor unit's main components.

Outdoor Unit Parts

Identification and functions of the outdoor unit's main components.

Technical Specifications

Model RAS-70 YH7 Specifications

Detailed specifications for the RAS-70YH7 model.

Model RAC-70 YH7 Specifications

Detailed specifications for the RAC-70YH7 model.

Operating Modes and Functions

Automatic Operation Guide

Instructions for using the automatic operation mode.

Timer Setting Instructions

Step-by-step guide to setting various timer functions.

Troubleshooting Guide

Troubleshooting Precautions

Safety and preparatory steps before troubleshooting the unit.

Self-Diagnosis Lamp Interpretation

Interpretation of self-diagnosis lamp blinking patterns for fault identification.

Hitachi RAS-70YH7 Specifications

General IconGeneral
BrandHitachi
ModelRAS-70YH7
CategoryAir Conditioner
LanguageEnglish

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