Heat Sink Temp Sensor Error
Inverter PCB
Heat sink temperature thermistor open/short circuit detected
Filter LED Continuous Flash.
Outdoor Unit : E. 77. 1
Error Code : 77
Trouble shooting 46
Indicate or Display:
Detective Actuators:
Detective details:
OUTDOOR UNIT Error Method:
1. Heat sink Thermistor open / short circuit
Forecast of Cause :
E. 77.1
04-54
OK
Check Point 2 : Check voltage of Inverter PCB (DC5.0V)
Inverter PCB (CN360:1-2) voltage value = 5V
Remove the thermistor from the inverter PCB and check the voltage
Check if connector is loose or removed
Check erroneous connection
Check if thermistor cable is open
>> Reset Power when reinstalling due to removed connector or incorrect wiring.
Check Point 1 : Check connection of Connector
If the voltage does not appear, replace Inverter PCB .
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