Compressor Temp Sensor 2 Error - Fujitsu Airstage V-II Service Manual

Trouble shooting 29
OUTDOOR UNIT Error Method:

Compressor Temp Sensor 2 Error

Detective Actuators:
Compressor temperature thermistor 2
Forecast of Cause :
1. Connector connection defective, open
2. Thermistor defective
3. Main PCB defective
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 22.
OK
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN145:1-3) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
CN145
Compressor temperature sensor 2 (CN145:1-3)
If the voltage does not appear, replace Main PCB and set up orignal address.
(Refer to 06-03 page Main PCB removal.)
Indicate or Display:
Outdoor Unit : E. 72. 2
Indoor Unit
Error Code
Detective details:
Compressor temperature thermistor 2 short detected
Compressor thermistor 2 open detected after compressor 2 operated
continuously for 5 minutes or more
1 2 3
1 2 3
: Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
: 72
DC
04-37