Fujitsu AO G30KBTB Series Service Instruction page 66

[For 36/ 45 type]
Trouble shooting 27-2
OUTDOOR UNIT Error Method:
Pressure sensor error
Detective Actuators:
Outdoor unit Main PCB
Pressure sensor
Forecast of Cause :
1. Connector connection failure
Check Point 1 : Check connection of the Pressure sensor
Check if the terminal connection is loose.
Check if connector is removed.
Check if connector is erroneous connection.
Check if cable is open.
>> Upon correcting the removed connector or mis-wiring, reset the power.
OK
Check Point 2 : Check output voltage of Main PCB
Check voltage of Main PCB.
(Measure at Main PCB side connector)
>>1 pin(Red) - 3 pin(Black) DC5V
RED
1 1
WHITE
P20 2 2
BLACK
3 3
If the voltage is not correct, replace Main PCB.
OK
Check Point 3 : Check output voltage of Pressure Sensor
Check voltage of Main PCB.
(Measure at Main PCB side connector)
>>2 pin(White) - 3 pIn(Black) Voltage is refer to the following graph.
4.5
Voltage [V]
0.5
0
If the voltage is not correct, replace Presure Sensor.
Indicate or Display:
Error code : 86
Detective details:
30 seconds or more after power-on, when pressure sensor detection
value detects the condition below continuously for 30 seconds or more.
Ps
=
2. Pressure sensor failure
5%
PS
PRESSURE SENSOR
5
Pressure [MPa]
> =
0 or Ps 5 [MPa]
3. Main PCB failure
DC
DC
02-29
Outdoor unit :
Mode Error L1 L2 L3 L4
2 8 6
: Light OFF : Light ON n : n times blinking
L5 L6