Compressor Temp. Thermistor Error
OK
OK
DC
Compressor temperature thermistor
Compressor temperature thermistor short or open detected
Check Point 1 : Check the connector connection and cable open
Connector connection state check
Cable open check
Check Point 2 : Check the thermistor
Thermistor characteristics check
(Disconnect the thermistor from the PCB and check.)
* For the thermistor characteristics, refer to the "Service Parts Information 8".
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB P15:1-3 voltage value =5V
Remove the thermistor from Main PCB, check the voltage.
If the voltage does not appear, replace Main PCB,
and execute the check operation again.
02-24
Trouble shooting 23
Detective Actuators:
Detective details:
OUTDOOR UNIT Error Method:
Indicate or Display:
Error code : 72
Outdoor unit : No indication
P15
THERMISTOR (COMPRESSOR)
BLACK
BLACK
3
2
1
3
2
1
1. Connector connection failure, open
2. Thermistor failure
3. Main PCB failure
Forecast of Cause :