Hitachi Set Free mini-HNRQ1 Series, Service Manual

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1. Outdoor Unit ..............................................................................................................................................122
1.1 Removing Service Cover .....................................................................................................................122
1.2 Removing Air Outlet Grille ...................................................................................................................123
1.3 Removing Upper Cover .......................................................................................................................124
1.4 Removing Lower Service Cover and Rear Cover ...............................................................................125
1.5 Removing Outdoor Fan Motor .............................................................................................................126
1.6 Removing Electrical Box .....................................................................................................................128
1.7 Removing Compressor ........................................................................................................................132
1.8 Removing High Pressure Switch and Pressure Sensor ......................................................................134
1.9 Removing 4-Way Valve Coil ................................................................................................................135
1.10 Removing Electronic Expansion Valve Coil .......................................................................................136
1.11 Removing Solenoid Valve Coil (SVA) ................................................................................................137
1.12 Removing 4-Way Valve .....................................................................................................................138
1.13 Removing Electronic Expansion Valve and Solenoid Valve ..............................................................139
2. Main Parts .................................................................................................................................................140
2.1 Inverter ...............................................................................................................................................140
2.2 Rotary Compressor .............................................................................................................................144
2.3 Scroll Compressor ...............................................................................................................................145
2.4 Thermistor ...........................................................................................................................................146
2.5 Electronic Expansion Valve for Outdoor Units .....................................................................................147
2.6 Pressure Sensor ..................................................................................................................................148
2.7 High Pressure Switch ..........................................................................................................................149
2.8 Noise Filter (NF1) ................................................................................................................................149
2.9 Reader (DCL) ......................................................................................................................................150
External Input/Output and Function Setting...................................................................................................151
1. External Input/Output Setting Method .......................................................................................................152
2. Exteral Input and Output Settings..............................................................................................................154
2.1 Definition of External Input and Output Settings .................................................................................154
2.2 External Input Function Setting ..........................................................................................................155
2.3 External Output Function Setting ........................................................................................................159
3. Function Setting.........................................................................................................................................161
4. Service and Maintenance Record by 7-Segment Display .........................................................................164
Field Work Instructions ..................................................................................................................................165
1. Caution for Refrigerant Leakage ...............................................................................................................166
2. Modifications of Charging Refrigerants ....................................................................................................166
3. Maintenance Work .....................................................................................................................................166
4. Service and Maintenance Record .............................................................................................................168
5. Saturation Curve for Refrigerant................................................................................................................169
Service Parts List...........................................................................................................................................170