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Utopia RAS-4HVRG
Hitachi Utopia RAS-4HVRG User Manual
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Models
Indoor Units
•
In-the-Ceiling T
ype
RPI-2.5HRG
RPI-4.0HRG
RPI-3.0HRG
RPI-5.0HRG
•
4-W
ay Cassette T
ype
RCI-2.5HRG
RCI-4.0HRG
RCI-3.0HRG
RCI-5.0HRG
•
2-W
ay Cassette T
ype
RCD-2.5HRG
RCD-4.0HRG
RCD-3.0HRG
RCD-5.0HRG
•
Ceiling T
ype
RPC-2.5HRG
RPC-4.0HRG
RPC-3.0HRG
RPC-5.0HRG
Outdoor Units
RAS-3HVRG
RAS-4HVRG
RAS-5HVRG
HIT
ACHI UT
OPIA
SERIES
INVERTER-DRIVEN SPLIT
-SYSTEM
HEA
T PUMP
AIR CONDITIONERS
- DC Inverter UT
OPIA
for Europe -
P5413554
2
Table of Contents
Default Chapter
2
Table of Contents
2
Initial Troubleshooting
4
Rotary Switch and Dip Switch Setting
4
Checking of Electrical Wiring
8
Checking by 7-Segment Display
9
Failure of Power Supply to Indoor Unit and Remote Control Switch
10
Abnormal Transmission between Remote Control Switch and Indoor Unit
11
Abnormalities of Devices
12
Troubleshooting Procedure
20
Alarm Code Table
20
Troubleshooting by Alarm Code
21
Troubleshooting in Check Mode by Remote Control Switch
56
Troubleshooting by 7-Segment Display
62
Protection Control Code on 7-Segment Display
64
Function of Leds
65
Procedure of Checking each Main Parts
67
Self-Checking of Pcbs Using Remote Control Switch
67
Self-Checking of Remote Control Switch
69
Procedure of Checking Other Main Parts
71
2 Servicing
78
Outdoor Unit
78
Removing Service Cover
78
Removing Air Outlet Grille
78
Removing Outdoor Fan
79
Removing Outdoor Fan Motor
79
Removing Compressor
80
Removing High Pressure Switch and Pressure Switch for Control
82
Removing Coil for Reversing Valve
83
Removing Coil for Expansion Valve
84
Removing Printed Circuit Board (PCB1)
85
Removing ISPM and ACT Module
86
Removing Electrical Components
88
3 Main Parts
90
Inverter
90
Specifications of Inverter
90
Arrangement of Inverter Power Unit
91
AC Chopper
92
Auto-Louver Mechanism
94
4-Way Cassette Type
94
2-Way Cassette Type
95
Ceiling Type
96
Scroll Compressor
97
Reliable Mechanism for Low Vibration and Low Sound
97
Principle of Compression
97
Structure
97
Thermistor
98
Thermistor for Indoor Unit
98
Thermistor for Outdoor Unit
99
Electronic Expansion Valve
101
Electronic Expansion Valve for Outdoor Units
101
Electronic Expansion Valve for Indoor Units
102
High Pressure Switch and Pressure Switch for Control
103
4 Field Work Instruction
104
Overheating in Case of Using PC-5H
104
Alarm 36
105
Select Guide of Drain Pipe for Indoor Unit
106
Maintenance Work
107
Service & Maintenance Record
110
5
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Hitachi Utopia RAS-4HVRG Specifications
General
Brand
Hitachi
Model
Utopia RAS-4HVRG
Category
Air Conditioner
Language
English
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