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Hitachi Utopia RAS-4HVRG User Manual

Hitachi Utopia RAS-4HVRG
127 pages
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Models
Indoor Units
In-the-Ceiling Type
RPI-2.5HRG RPI-4.0HRG
RPI-3.0HRG RPI-5.0HRG
4-Way Cassette Type
RCI-2.5HRG RCI-4.0HRG
RCI-3.0HRG RCI-5.0HRG
2-Way Cassette Type
RCD-2.5HRG RCD-4.0HRG
RCD-3.0HRG RCD-5.0HRG
Ceiling Type
RPC-2.5HRG RPC-4.0HRG
RPC-3.0HRG RPC-5.0HRG
Outdoor Units
RAS-3HVRG RAS-4HVRG RAS-5HVRG
HITACHI UTOPIA SERIES
INVERTER-DRIVEN SPLIT-SYSTEM
HEAT PUMP AIR CONDITIONERS
- DC Inverter UTOPIA for Europe -
P5413554

Table of Contents

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Hitachi Utopia RAS-4HVRG Specifications

General IconGeneral
Cooling Capacity (BTU)12000
Power Supply (V)220-240
RefrigerantR410A
Indoor Unit Weight9 kg
Power Supply (Hz)50
Outdoor Unit Dimensions (WxHxD)780 x 540 x 260 mm

Summary

Troubleshooting

Initial Troubleshooting

Covers basic checks, wiring, display readings, and common faults.

Troubleshooting Procedure

Details alarm codes, troubleshooting flowcharts, and check modes for diagnostics.

Procedure of Checking Each Main Parts

Explains self-checking methods for PCBs and other major components.

Servicing

Outdoor Unit

Step-by-step instructions for disassembling and removing outdoor unit parts.

Main Parts

Inverter

Details inverter specifications, arrangement, and protection functions.

AC Chopper

Explains the AC Chopper mechanism for fan motor control.

Auto-Louver Mechanism

Describes the auto-louver operation and stoppage for different cassette types.

Scroll Compressor

Details the reliable mechanism, principle, and structure of scroll compressors.

Thermistor

Explains the function and location of various thermistors in indoor and outdoor units.

Electronic Expansion Valve

Covers specifications and operation of electronic expansion valves.

High Pressure Switch and Pressure Switch for Control

Explains the function of high pressure and control pressure switches.

Field Work Instruction

Overheating in Case of Using PC-5H

Addresses overheating issues and provides a procedure for self-checking.

Alarm 36

Explains the cause and countermeasure for Alarm 36 (incorrect unit combination).

Select Guide of Drain Pipe for Indoor Unit

Provides guidelines for selecting appropriate drain pipe diameters.

Maintenance Work

Outlines inspection and maintenance procedures for indoor and outdoor units.

Electrical Wiring Diagrams

ELECTRICAL WIRING DIAGRAM (FOR MODELS: RCI-1.5~5.0FSG2Ei)

Provides wiring diagrams for specific RCI model series.

Refrigerant Cycle

REFRIGERATION CYCLE SINGLE TYPE

Illustrates the refrigerant flow for single-type systems.

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