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TROUBLESHOOTING
“RUN” light flickers and “ALARM” is indicated on the remote control switch.
The unit No., alarm code and the unit code is alternately indicated on the set temperature section,
and the alarm code is indicated on the display of the outdoor unit PCB.
This alarm is indicated when the any alarm code of 51, 52, 53 and 54 occurs the abnormality 3 times
in 30 minutes including 3. Retry operation is performed up to the occurrence of 2 times.
Conditions: ISPM Thermistor is more than 100 deg.
Alarm
Code
Activating Protection Against Temperature Increasing of Inverter Fin
Yes
No
Restart operation.
Does it trip soon?
Is the heat exchanger of
outdoor unit clogged?
No
Apply the silicon grease
between ISPM and fin
securely. *2)
Replace the ISPM. *1)
Replace the ISPM. *1)
Remove clogging.
Yes
Yes
No
Is the silicon grease coated
securely between ISPM and
fin?
1*): Before replacing the ISPM, refer to item 1.3.3 (1) regarding electrical discharge.
2*): Silicone grease (P22760) is available as a spare parts.
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