Discharge Temp Sensor Error - Fujitsu Airstage J-II Service Manual

Trouble shooting 21
OUTDOOR UNIT Error Method:

Discharge Temp Sensor Error

Detective Actuators:
Discharge temperature thermistor 1
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 (CN141:1-2) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
Discharge temperature sensor 1 (CN141:1-2)
If the voltage does not appear, replace Main PCB and set up orignal address.
Indicate or Display:
Outdoor Unit : E. 71. 1
Indoor Unit
Error Code
Detective details:
Discharge temperature thermistor 1 short detected
Discharge thermistor 1 open detected after compressor 1 operated
continuously for 5 minutes or more
1 2 3 4 5 6
1 2 3 4 5 6
CN141
: Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
: 71
DC
04-31