Fujitsu AS*G24LFCA Service Instruction page 43

Trouble shooting 16
OUTDOOR UNIT Error Method:
High Pressure Switch Error
Detective Actuators:
Outdoor unit Main PCB
High Pressure Switch
Forecast of Cause :
1. High pressure switch connector disconnection, open
2. High pressure switch characteristics failure
3. 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
Change Main PCB, and execute the check operation again.
Type of contact
C
H
Pressure
Characteristics of pressure switch
Contact : Short Open
Contact : Open Short
Indicate or Display:
Refer to error code table.
Detective details:
When pressure switch open is detected in 10 seconds
after the power is turned on.
(24LFL/LFCC/30LFT : CN90 )
Pressure switch 1
4.2 0.1MPa
3.2 0.15MPa
02-18