Alarm code
5A
Abnormal fan controller fin temperature.
• The RUN indicator flashes and the ALARM indication is displayed on the remote control switch.
• The unit no., the alarm code and the unit code are alternatively displayed in the temperature setting section and the unit
no. and alarm code are displayed on the outdoor unit's PCB1 display.
* This alarm is indicated when the fan controller fin temperature anomaly occurs ten times in thirty minutes (retry
operation is carried out up to nine times).
Activation condition: this alarm is indicated when the thermistor temperature inside the transistor module increases over
100 °C.
PCB1: Control PCB in Outdoor Unit
Yes
No
Is the heat exchanger of
outdoor unit clogged?
Failure of fan controller.
Repl
ace the f
an controller.
Remove clogging.
Yes
Yes
Is the silicon grease coated all over
betw
ee
n the transistor module and the
radiated fin?
No
Coat the silicon grease to all
the touched
face between
the transistor module and the
radiated fin fully. *1)
Replace the fan controller.
No
Restart operation.
Does it trip soon?
*1): Use silicone grease supplied as an accessory (Service part No. P22760).
8 Troubleshooting
228
SMGB0065 rev. 1 - 12/2010
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