Fujitsu AO G18LBCA Series Service Instruction page 56

Trouble shooting 26
OUTDOOR UNIT Error Method:
Pressure Sensor Error
Detective Actuators:
High pressure switch
Forecast of Cause :
1. High pressure switch connector disconnection, open
2. High pressure switch characteristics failure3. Main PCB failure
Check Point 1 : Check the high pressure switch connection state
Connector and wiring connection state check
Cable open check
OK
Check Point 2 : Check the high pressure switch characteristics
Switch characteristics check
* For the characteristics of high pressure switch, refer to below.
OK
Check Point 3 : Replace Main PCB
, and execute the check operation again.
Change Main PCB
Type of contact
C
H
Pressure
Characteristics of pressure switch
Contact : Short Open
Contact : Open Short
Indicate or Display:
Error code : 86
Detective details:
When the power was turned on, "high pressure switch : open" was detected.
(CN 74)
Pressure switch 1
4.2 0.1MPa
3.2 0.15MPa
02-27
Outdoor unit : No indication