Hitachi RAS-(4-12)HNP(1)(E) - Abnormality of Inverter Fin Temperature (RAS-(8-12)HN(P;C)(E))

8 Troubleshooting
271
SMGB0087 rev.0 - 12/2013
8
Alarm code
54
Abnormality of inverter n temperature (RAS-(8-12)HN(P/C)(E))
- This alarm code is indicated after the operation is stpped when the following condition occurs three times within 30
minutes. The retry operation is performed twice.
Conditions:
• When the temperature of the thermistor for inverter n excess 100 °C.
Remove the clogging
Is the heat
exchanger of outdoor
unit clogged?
No
Yes
Replace the DIP IPM, ISPM, IMP. *1
Yes
Faulty PCB2 or thermistor.
Replace it.
No
Restart the
operation.
Does it trip soon?
Is thermistor short
circuit or faulty?
No
Replace the thermistor
Yes
N O T E
1*): Perform the high voltage discharge work by referring to the item “8.4.7 Checking procedure for other parts”, before
checking and replacing the inverter components.