Hitachi RAS-4-HNC - Troubleshooting

General Index
vi
SMGB0079 rev.0 - 01/2013
5.4.1 Cooling operation ........................................................................................................................................ 128
5.4.2 Dry operation ............................................................................................................................................... 130
5.4.3 Heating operation ........................................................................................................................................ 132
5.4.4 Automatic cooling and heating operation .................................................................................................... 134
5.4.5 Defrost operation control ............................................................................................................................. 135
5.5 Standard control functions ......................................................................................................................138
5.5.1 Freezing protection during cooling process or dry operation ...................................................................... 138
5.5.2 Prevention Control for High Pressure Increase during Cooling Operation .................................................. 139
5.5.3 Prevention control for excessively high discharge gas temperature ........................................................... 140
5.5.4 Activation for protection device control ........................................................................................................ 141
5.5.5 Preheating control of compressor ............................................................................................................... 142
5.5.6 Prevention control for high pressure increase ............................................................................................. 143
6. Optional functions ......................................................................................................145
6.1 Optional input and output signals (By 7-segment display) .....................................................................146
6.1.1 Available ports ............................................................................................................................................. 146
6.1.2 Available optional signals ............................................................................................................................ 148
6.1.3 Setting of the optional signals ..................................................................................................................... 150
6.1.4 Description of optional signals ..................................................................................................................... 151
6.2 Optional functions (By 7-segment display) .............................................................................................154
6.2.1 Setting of the optional functions .................................................................................................................. 154
6.2.2 Description of the optional functions ........................................................................................................... 157
6.3 Optional functions (By remote control switch) ........................................................................................161
7. Test run ........................................................................................................................167
7.1 Checking procedure before the test run .................................................................................................168
7.2 Test run procedure using the remote control switch (PC-ART) ..............................................................170
7.3 Test run procedure using the remote control switch (PC-ARF) ..............................................................172
7.4 Test run procedure using the wireless remote control switch (PC-LH3A/B) ...........................................175
7.5 Test run procedure from the outdoor unit side ........................................................................................177
7.6 Check list ................................................................................................................................................179
7.6.1 Check list on test run ................................................................................................................................... 179
7.6.2 Check list on compressor ............................................................................................................................ 180
8. Troubleshooting .........................................................................................................183
8.1 Initial troubleshooting ..............................................................................................................................184
8.1.1 Checking by means of the 7-segment display ............................................................................................. 184
8.1.2 Failure of the power supply to the indoor unit and the remote control switch ............................................. 185