E: 86. High Pressure Switch Error (Outdoor Unit) - Fujitsu AUXG07KVLA Service Manual

2-34. E: 86. High pressure switch error (Outdoor unit)

Indicator Indoor unit
Outdoor unit main PCB
Detective actuator
High pressure switch
Forecast of cause
Check point 1. Reset power supply and operate
Does abnormal LED indication show again?
Check point 2. Check output voltage of main
PCB
Make sure circuit diagram of outdoor unit and
check terminal voltage at thermistor (DC 5.0 V
± 5%).
NOTE: For details of thermistor connector, re-
fer to "Wiring diagrams"
TECHNICAL DATA AND PARTS LIST
on page 02-117.
If the voltage is not correct, replace main PCB.
Check point 3. Check pressure switch
Check if connector is loose or cable is open.
-> If no abnormal connection is found, replace
pressure switch.
After replacing pressure switch, check operating
condition and pressure in operation.
• Characteristics of pressure switch
Contact: Short → Open
Contact: Open → Short
CN37
Contact: Short → Open
Contact: Open → Short
CN36
2-34. E: 86. High pressure switch error (Outdoor unit)
Operation indicator
Timer indicator
Economy indicator
Error code
↓
in Chapter 2.
↓
↓
End
Pressure switch 1
Pressure switch 2
Continuous flash
When pressure switch open is detected in 10 seconds
after the power is turned on.
Connector connection failure
Pressure sensor failure
Main PCB failure
If no, go to "Check point
- (03-50) -
8 time flash
6 time flash
E: 86
3".
4.2 ±0.1 MPa
3.2 ±0.15 MPa
+0
37 MPa
-0.2
2.9 ±0.2 MPa
2. Troubleshooting with error code