20
Technical Information
4. Start-up failure (following AP1 for outdoor unit control board)
Mainly detect:
• Whether the compressor wiring is connected correctly?
• Is compressor broken?
• Is time for compressor stopping, enough?
Fault diagnosis process:
Power on the unit
Is stop time of the
compressor longer than
3 minutes?
Does startup fail?
Are the wires for the
compressor connected
correctly? Is connection
sequence right?
Replace the control
panel AP1
Is the fault is
eliminated?
Replace the
compressor
End
YES
YES
YES
NO
Restart it up after
3 minutes?
Connect the wires as
per the connection
diagram
NO
NO
NO
