Fujitsu AUXB04GALH Service Manual page 129

Trouble shooting 51
OUTDOOR UNIT Error Method:
Suction Pressure Sensor Error
Detective Actuators:
Suction pressure sensor
Forecast of Cause :
1. Suction pressure sensor connector disconnection, open
2. Suction pressure sensor defective
3. Main PCB defective
Check Point 1 : Check the suction pressure sensor connection state
Connector connection state check
Cable open check
OK
Check Point 2 : Check the suction pressure sensor
Sensor characteristics check
* For the characteristics of the suction pressure
refer to the "Service Parts Information 15".
OK
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN119:1-3) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
Suction pressure sensor (CN119:1-3)
Indicate or Display:
E. 86.3
Outdoor Unit : E. 86. 3
Indoor Unit
Error Code
Detective details:
When any of the following conditions is satisfied, a suction pressure
sensor error is generated.
1. 30 seconds or more have elapsed since the outdoor unit power was turned
on and pressure sensor detected value
seconds or more.
2. 30 seconds or more have elapsed since the outdoor unit power was turned
on and pressure sensor detected value
sensor
,
PS
1 2 3
1 2 3
CN119
: Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
: 86
DC
04-59
0.06V continued for 30
5.0V was detected.