Fujitsu ARYG72LHTA Service Instruction page 74

Trouble shooting 37
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 sensor,
refer to the "Service Parts Information 9".
OK
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN119:1-3) voltage value = 5V
Remove the sensor from Main PCB, check the voltage.
Suction pressure sensor (CN119:1-3)
If the voltage does not appear, replace Main PCB and set up original address.
E86. 3 Indicate or Display:
Error code : 86 ( 86.3 )
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
or more.
2. 30 seconds or more have elapsed since the outdoor unit power was turned
on and pressure sensor detected value
PS
1 2 3
1 2 3
CN119
Outdoor unit :
POWER
MODE
2
DC
02-38
PUMP LOW PEAK
DOWN NOISE CUT
ERROR
(L1) (L2) (L3) (L4) (L5)
6
8
0.06V continued for 30 seconds
5.0V was detected.
(L6)