Fujitsu AUXB04GALH Service Manual page 134

Trouble shooting 46
OUTDOOR UNIT Error Method:
Liquid Pipe Temp. Sensor 2 Error
Detective Actuators:
Liquid pipe temp. sensor 2
Forecast of Cause :
1. Connector connection defective, open
2. Sensor 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 sensor
Sensor characteristics check (Disconnect the sensor from the PCB and check.)
* For the sensor characteristics, refer to the "Service Parts Information 24".
OK
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN142: 3-4) voltage value = 5V
Remove the sensor from Main PCB, check the voltage.
THERMISTOR (SC. INT. LIQ)
BLACK
1 1
BLACK
2 2
BLACK
3 3
BLACK
4 4
THERMISTOR (SC. EXT. LIQ)
CN142
5 5
THERMISTOR (SC. EXT. GAS)
6 6
BLACK
7 7
BLACK
8 8
Liquid pipe temp. sensor 2 (CN142: 3-4)
If the voltage does not appear, replace Main PCB and set up original address.
Indicate or Display:
E83. 2
Outdoor Unit : E. 8 3. 2
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Error Code : 9 U / 8 3
Detective details:
Liquid pipe temp. sensor 2 short or open detected
04-58
Filter LED Continuous Flash.
DC