Sub-Cool Heat Ex. Gas Inlet Temp Sensor Error - Fujitsu Airstage J-II Service Manual

Trouble shooting 27
OUTDOOR UNIT Error Method:
Sub-cool Heat EX. Gas Inlet
Temp Sensor Error
Detective Actuators:
Sub-cooling heat exchanger gas inlet
temperature thermistor
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 (CN142:5-6) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
Sub-cooling heat exchanger gas inlet temperature sensor (CN142:5-6)
Indicate or Display:
Outdoor Unit : E. 82. 1
Indoor Unit
Error Code
Detective details:
Sub-cooling heat exchanger gas inlet temperature thermistor short or
open detected
CN142
: Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
: 82
DC
04-37