Fujitsu AOUH18LMAS1, Service Manual

Page: 81 / 215

2-24. E: 86.X. High pressure switch error (Outdoor unit)
Indicator
Indoor unit
Operation indicator 8 time flash
Timer indicator 6 time flash
Economy indicator Continuous flash
Error code E: 86
outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-4
Detective actuator Outdoor unit main PCB
→hen pressure switch open is detected in 10 seconds
after the power is turned on.
High pressure switch
Forecast of cause
High pressure switch connector disconnection or open
High pressure switch characteristics failure
Main PCB failure
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.
End
• Type of contact
C
H
Pressure
• Characteristics of pressure switch
Pressure switch 1
Contact: Short Open 4.2 ±0.1 MPa
Contact: Open Short 3.2 ±0.15 MPa
18/24 model: P770
2-24. E: 86.↓. High pressure switch error (Outdoor unit)
- (03-39) -
2. Troubleshooting with error code
TR
O
U
B
LESH
O
O
TI
N
G
TR
O
U
B
LESH
O
O
TI
N
G