Fujitsu AUXG18KVLA, Service Manual

Page: 107 / 222

2-28. E: 86. Pressure sensor error (Outdoor unit)
Indicator
Wired remote
controller
Error code E: 86
Detective actuator
Outdoor unit main PCB 30 seconds or more after power-on, when pressure
sensor detection value detects the condition below
continuously for 30 seconds or more.
Ps ≤ 0 or Ps ≥ 5 [MPa]
High pressure switch
Forecast of cause
Connector connection failure
Pressure sensor failure
Main PCB failure
Check point 1. Check connection of the pressure sensor
• Check if the terminal connection is loose.
• Check if connector is removed.
• Check erroneous connection.
• Check if cable is open.
-> Upon correcting the removed connector or mis-wiring, reset the power.
↓
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, refer to "Wiring diagrams" in Chapter 2.
TECHNICAL DATA AND PARTS LIST on page 02-37.
If the voltage is not correct, replace main PCB.
↓
Check point 3. Check output voltage of pressure sensor
Make sure circuit diagram of outdoor unit and check terminal voltage. Voltage is refer
to the following graph.
4.5
0.5
0 5
Pressure [MPa]
Voltage [V]
If the voltage is not correct, replace pressure sensor.
↓
End
2-28. E: 86. Pressure sensor error (Outdoor unit)
- (03-35) -
2. Troubleshooting with error code
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