Hitachi RAS-(4-12)HNP(1)(E) - Abnormality of Inverter Fin Temperature (RAS-3 HVNP1 E; RAS-(4-6)H(V)N(P;C)1 E)

8 Troubleshooting
270
SMGB0087 rev.0 - 12/2013
Alarm code
54
Abnormality of inverter n temperature (RAS-3HVNP1E / RAS-(4-6)H(V)N(P/C)1E)
- 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 80 °C (RAS-3HVNP1E)
• When the temperature inside the transistor module excess 90 °C (RAS-(4-6)H(V)N(P/C)1E).
Remove clogging
Is the heat
exchanger of outdoor
unit clogged?
No
Yes
Replace inverter PCB. *1)
Yes
Replace inverter PCB. *1)
No
Restart operation.
Does it trip soon?
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.