Hitachi RAS-8FSXN - Page 153

8. T r o u b l e s h o o t i n g
Index
8.1
Initial troubleshooting................................................................................................................. 148
8.1.1 Checking the electrical wires and the power source .................................................................... 148
8.1.2 Checking by 7-segment display.................................................................................................... 149
8.1.3 Checking of the alarm code history............................................................................................... 150
8.1.4 Emergency operation.................................................................................................................... 153
8.1.5 Failure of the power supply to the indoor units and the remote control switch............................. 158
8.1.6 Abnormal transmission between the remote control switch and the indoor unit........................... 159
8.1.7 Abnormal operation of the devices................................................................................................ 160
8.2 Procedure for troubleshooting.................................................................................................... 168
8.2.1 Alarm codes.................................................................................................................................. 168
8.3 Troubleshooting by alarm code.................................................................................................. 170
8.3.1 Alarm codes.................................................................................................................................. 170
8.4 Troubleshooting in the check mode by using the remote control switch.................................... 238
8.5 Troubleshooting by using the 7-segment display....................................................................... 245
8.6 RSW, DSWs and LEDs functions............................................................................................... 257
8.7 Checking procedures for each main part................................................................................... 262
8.7.1 Self-checking of PCB using the remote control............................................................................. 262
8.7.2 Self-checking of the remote control switch.................................................................................... 265
8.7.3 Checking procedures for other main parts.................................................................................... 267
8 Troubleshooting
147
SMGB0065 rev. 1 - 12/2010
8