E: 86. High Pressure Switch Error (Outdoor Unit) - Fujitsu AUXG18KVLA Service Manual

2-27. E: 86. High pressure switch error (Outdoor unit)

Wired remote
Indicator
controller
Outdoor unit main PCB
Detective actuator
High pressure switch
Forecast of cause
Check point 1. Check the high pressure switch connection state
• Check connector and wiring connection state.
• Check if cable is open
-> Reset power when reinstalling due to removed connector or incorrect wiring.
Check point 2. Check the high pressure switch characteristics
• Check switch characteristics.
For the characteristics of the high pressure switch, refer to below.
Check point 3. Replace main PCB
Change main PCB and check operation again.
• Type of contact
• Characteristics of pressure switch
Contact: Short → Open
Contact: Open → Short
36/45/54 model: P770
2-27. E: 86. High pressure switch error (Outdoor unit)
Error code
When pressure switch open is detected in 10 seconds
after the power is turned on.
High pressure switch connector disconnection or open
↓
↓
↓
End
C
Pressure
Pressure switch 1
- (03-34) -
E: 86
High pressure switch characteristics failure
Main PCB failure
H
4.2±0.1 MPa
3.2 ± 0.15 MPa
2. Troubleshooting with error code