Troubleshooting - Hitachi RASC-4HNPE Service Manual

10 Troubleshooting

Index
10.1 Initial troubleshooting .......................................................................................................................... 186
10.1.1 Checking using the 7-segment display ...................................................................................................... 186
10.1.2 Failure of the power supply to the indoor unit and the remote control switch ........................................... 187
10.1.3 Abnormal transmission between the remote control switch and the indoor unit ........................................ 188
10.1.4 Abnormal operation of the devices ............................................................................................................ 188
10.2 Troubleshooting procedure ................................................................................................................. 196
10.2.1 On-screen displays during abnormal operation ......................................................................................... 196
10.2.2 Alarm codes ............................................................................................................................................... 197
10.2.3 Troubleshooting by alarm code ................................................................................................................. 199
10.3 Troubleshooting in check mode .......................................................................................................... 245
10.3.1 Troubleshooting using the remote controller PC-ART ............................................................................... 245
10.3.2 Troubleshooting using the remote controller PC-ARF ............................................................................... 255
10.3.3 Troubleshooting using the 7 segment display ........................................................................................... 261
10.4 Checking procedure for main parts ..................................................................................................... 267
10.4.1 Checking procedure for the control PCB (PCB1) ...................................................................................... 267
10.4.2 Checking procedure for the inverter PCB .................................................................................................. 269
10.4.3 Fault diagnosis of fan motor ...................................................................................................................... 275
10.4.4 Checking procedure for the electronic expansion valve for indoor and RASC units ................................. 276
10.4.5 Checking procedure for other parts ........................................................................................................... 276
185 SMGB0091 rev.2 - 11/2015
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