Fujitsu ARTG30LHTA Service Instruction page 19

Trouble shooting 13
OUTDOOR UNIT Error Method:
Compressor Thermistor Error
Detective Actuators:
Compressor temperature thermistor
Forecast of Cause :
1. Connector connection failure, open
2. Thermistor failure
3. Main PCB failure
Check Point 1 : Check the connector connection and cable open
Connector connection state check
Cable open check
OK
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".
OK
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN62:3-4) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
Compressor temperature thermistor (CN62:3-4)
If the voltage does not appear, replace Main PCB
the check operation again.
Indicate or Display:
Refer to error code table.
Detective details:
Compressor temperature thermistor short detected
Compressor thermistor open detected
1 2 3 4
1 2 3 4
CN62
, and execute
DC
02-16