High Pressure Switch Error - Fujitsu ASTG18KMTC Service Instruction

Trouble shooting 17
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 high pressure switch
Contact : Short Open
Contact : Open Short
Indicate or Display:
Outdoor Unit
Indoor Unit
ERROR CODE : [E : 86]
Detective details:
When pressure switch open is detected in 10 seconds
after the power is turned on.
(P20)
high pressure switch
4.2 0.1MPa
3.2 0.15MPa
02-27
: LED 0.1sec ON/ 0.1sec OFF
: Operation lamp: 8 times Flash, Timer lamp: 6 times Flash
Economy lamp : Continuous flash.