Fujitsu AOUH18LMAS1, Руководство по обслуживанию

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2-25. E: 86.X. Pressure sensor 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 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 "→iring diagrams" in Chapter 2.
TECHNICAL DATA AND PARTS LIST on page 02-18.
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
2-25. E: 86.↓. Pressure sensor error (Outdoor unit)
- (03-40) -
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