Fujitsu AUXB04GALH Service Manual page 126

Trouble shooting 48
OUTDOOR UNIT Error Method:
SC.HE. Liquid Outlet Sensor Error
<TH7>
Detective Actuators:
Liquid pipe 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 17".
OK
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN142:1-2) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
1 2 3 4
1 2 3 4
CN142
Liquid pipe temperature sensor 2 (CN142:1-2)
Indicate or Display:
E. 83.2
Outdoor Unit : E. 83. 2
Error Code
Detective details:
SC.HE.Liquid Outlet temperature thermistor 2 short or open detected
Filter LED Continuous Flash.
: 83
DC
04-56