Hitachi RAS-(3-6)HVRNM2E Service Manual page 310

8 Troubleshooting
4 Turn ON the power supply.
After finishing the checking, turn OFF the power supply again and reconnect the connectors according to the previous
situation before the checking.
N O T E
• If this indication continues and the alarm code J1is not displayed, this means that each one of indoor unit is
not connected to the remote control switch.
• Check the wiring between the remote control switch and the indoor unit.
• In this troubleshooting procedure, checking of the following parts of the PCB is not available.
- PCB in Indoor Unit: Relay circuit, DIP switch, option circuit, fan circuit, protection circuit.
- PCB in Outdoor Unit: Relay circuit, DIP switch, option circuit.
•
If this troubleshooting is performed in the system by means of the central station, the indication of the central
station may change during this procedure. However, this is not abnormal.
• After this troubleshooting, the memory of the abnormal operation occurrence counter, which was described
before, will be deleted.
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SMGB0064 rev.0 - 08/2011
ADDS. RN