Hitachi Utopia RAS-4HVRG - Main Parts; Inverter; AC Chopper; Select Guide of Drain Pipe for Indoor Unit

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- CONTENTS -
No. Page
3. MAIN PARTS .............................................................................................................................................. 3-1
3.1 Inverter ................................................................................................................................................. 3-1
3.1.1 Specifications of Inverter .............................................................................................................. 3-1
3.1.2 Arrangement of Inverter Power Unit ............................................................................................. 3-2
3.2 AC Chopper ......................................................................................................................................... 3-3
3.3 Auto-Louver Mechanism ...................................................................................................................... 3-5
3.3.1 4-Way Cassette Type ................................................................................................................... 3-5
3.3.2 2-Way Cassette Type ................................................................................................................... 3-6
3.3.3 Ceiling Type .................................................................................................................................. 3-7
3.4 Scroll Compressor ................................................................................................................................ 3-8
3.4.1 Reliable Mechanism for Low Vibration and Low Sound ............................................................... 3-8
3.4.2 Principle of Compression .............................................................................................................. 3-8
3.4.3 Structure ....................................................................................................................................... 3-8
3.5 Thermistor ............................................................................................................................................ 3-9
3.5.1 Thermistor for Indoor Unit ............................................................................................................. 3-9
3.5.2 Thermistor for Outdoor Unit .......................................................................................................... 3-10
3.6 Electronic Expansion Valve .................................................................................................................. 3-12
3.6.1 Electronic Expansion Valve for Outdoor Units .............................................................................. 3-12
3.6.2 Electronic Expansion Valve for Indoor Units ................................................................................. 3-13
3.7 High Pressure Switch and Pressure Switch for Control ....................................................................... 3-14
4. FIELD WORK INSTRUCTION .................................................................................................................... 4-1
4.1 Overheating in Case of Using PC-5H .................................................................................................. 4-1
4.2 Alarm 36 ............................................................................................................................................... 4-2
4.3 Select Guide of Drain Pipe for Indoor Unit ........................................................................................... 4-3
4.4 Maintenance Work ............................................................................................................................... 4-4
4.5 Service & Maintenance Record by 7-Segment Display ....................................................................... 4-5
4.6 Service & Maintenance Record by Remote Control Switch ................................................................. 4-6
4.7 Service & Maintenance Record ............................................................................................................ 4-7