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16.5.36 Outdoor High Pressure Switch Abnormal (F27)
Malfunction Decision Conditions:
During compressor stop, and outdoor high pressure switch is remain opened.
Malfunction Caused:
1 Faulty connector connection.
2 Faulty switch.
3 Faulty outdoor unit PCB (main).
Abnormality Judgment:
Continue for 1 minute.
Check the continuity of the outdoor high
pressure switch:
- Plug out outdoor high pressure switch
connector from CN-PSW1 channel
- Measure the connector continuity
Yes
Yes
Check the CN-PSW1 connector connection:
- Turn OFF the power
- Check the connector connection
- Connector poor contact
- Correct the connection
No
Is the CN-PSW1 connector
connection normal?
No
Is there any continuity?
- Defect in outdoor high
pressure switch
- Replace the outdoor high
pressure switch
- Defect in outdoor unit PCB
(main)
- Replace the outdoor unit
PCB (main)
Multimeter
(normally close)
Troubleshooting:
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
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