Hitachi RAS-(3-6)HVRNM2E User Manual

Printed in SpainSMGB0064 rev.0 - 08/2011
Hitachi air conditioning products are manufactured according to:
ISO 9001 of JQA, Japan for its Quality Management accordance with the
standard
ISO 14001 of JACO, Japan for its Environmental Management accordance with
the standard
Hitachi Air Conditioning Products Europe, S.A. is certified with:
ISO 9001 of AENOR, Spain for its Quality Management accordance with the
standard
ISO 14001 of AENOR Spain for its Environmental Management systems
accordance with the standard
Hitachi certifies that our products have met EU consumer safety, health and
environmental requirements.
Hitachi Air Conditioning Products Europe, S.A.
Ronda Shimizu, 1 - Polig. Ind. Can Torrella
08233 Vacarisses (Barcelona) Spain
HITACHI participates in the Eurovent Certification Programme; the certified
data of certified models are listed in the Eurovent Certification Online Directory
(www.eurovent-certification.com).
SMGB0064 rev. 0 - 08/2011
Service Manual
UTOPIA DC-INVERTER IVX/(2/2.5)HP/ES SERIES
H(V)RN(S)(2)(E)
H(V)RNM(2)(E)
UTOPIA DC-INVERTER IVX/(2/2.5)HP/ES SERIES
RAS-(3-6)HVRNM2E
RAS-(4-12)HRNM(2)(E)
RAS-(2-3)HVRN(S)(2)
RAS-(4-6)HVRNS2E
RAS-(4-10)HRNS(2)E

Hitachi RAS-(3-6)HVRNM2E Specifications

General

Brand	Hitachi
Model	RAS-(3-6)HVRNM2E
Category	Air Conditioner
Language	English

Summary

Unit Installation

2.1 Safety summary

Outlines critical safety precautions and warnings for installing the outdoor unit to prevent hazards.

2.5 Installation space (Initial ckeck)

Specifies required installation space and clearances for different unit configurations to ensure proper operation and maintenance.

Piping work and refrigerant charge

3.2 Piping work connection considerations

Covers crucial aspects of piping materials, connection methods, brazing, and refrigerant handling for system integrity.

Electrical Wiring

4.1 General check

Emphasizes safety checks before electrical wiring installation or periodical checks, including power OFF and wire routing.

4.2 Electrical wiring for the outdoor unit IVX Series

4.3 Electrical wiring for the outdoor unit ES Series

4.4 Electrical wiring between indoor unit and outdoor unit

Explains how to connect electrical wires between indoor and outdoor units, including power and signal wiring considerations.

4.6 Electrical wiring diagrams

Control System

5.2 Outdoor units PCB

5.3 Protection and safety control

Outlines the protection and safety controls for compressors and fan motors, including high-pressure switches and internal thermostats.

Test Run

7.1 Checking procedure before the test run

Details essential pre-test run checks, including electrical safety, refrigerant piping, DIP switch settings, and component checks.

7.2 Test run procedure using the remote control switch

Provides step-by-step instructions for performing a test run using the wired remote control switch, including fault diagnosis.

7.3 Test run procedure using the wireless remote control switch

Explains how to perform a test run using the wireless remote control, including setting the TEST RUN mode and checking commands.

7.4 Test run procedure from the outdoor unit side

Outlines the procedure for performing a test run directly from the outdoor unit side using DIP switches for operational checks.

7.5 Check list

Provides a comprehensive checklist for verifying the correct installation and operation of IVX and ES series units before final handover.

Troubleshooting

8.1 Initial troubleshooting for IVX an ES Series

Offers initial troubleshooting steps based on the 7-segment display, power supply issues, and abnormal transmission.

8.2 Troubleshooting procedure for IVX an ES Series

Guides through troubleshooting procedures for alarm codes, check mode operations, and specific faults like inverter stoppage.

8.3 Procedure for checking each main part

Electrical checks of main parts

11.1 Inverter

Explains the specifications and protection functions of inverters for both IVX and ES series, crucial for electrical troubleshooting.

11.2 Thermistor

11.3 Electronic expansion valve

11.4 High pressure protection device

Maintenace notes

12.1 Checking the power source and the wiring connection

12.2 Burnt-out compressor due to an insufficient refrigerant charge

Addresses field issues related to insufficient refrigerant charge causing compressor overheating and failure, with countermeasure examples.

12.3 Insufficient cooling performance when a long piping is applied

12.5 Alarm code “31”

12.6 Not cooling well due to insufficient installation space for the outdoor unit

12.7 Caution with the refrigerant leakage

Provides critical information on maximum permissible HCFC gas concentration and countermeasures for refrigerant leakage according to KHK standards.

12.12 Pump-down method for replacing the compressor

Provides a detailed procedure for pump-down and refrigerant collection when replacing the compressor, including safety warnings.