8 Troubleshooting
271
SMGB0064 rev.0 - 08/2011
8
Alarm code
54
Increase in the inverter n temperature IVX Series
• The RUN LED ickers and “ALARM” is displayed on the remote control switch.
• The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit
number and the alarm code are displayed on the display of the outdoor unit PCB.
- If the alarm code “51” or “54” occurs three times within 30 minutes, the alarm code which occurred for the third time
is displayed. The retry operation is performed twice.
Conditions:
• When the temperature of the thermistor for inverter n excess 100 °C (RAS-(4-12)HRNM(2)(E)) or 80 °C (RAS-(3-6)
HVRNM2E), 3 times in 30 minutes, this alarm is indicated and the operation is stopped. In the case the occurrence is
smaller than 2 times, retry is performed.
No
Replace the dipIPM, ISPM,
IPM. *1
Restart the operation.
Does it trip soon?
Yes
Remove the clogging
Is the heat exchanger of the
outdoor unit clogged?
Faulty PCB2 or thermistor.
Replace it.
No
Is thermistor short circuit or
faulty?
No
Yes
Replace the thermistor
Yes
N O T E
1*): Perform the high voltage discharge work by referring to the item Procedure of checking other main parts for
ES Series, see on page 312 before checking and replacing the inverter components.
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