York EVHC 09 DSAAAR Service Manual page 50

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(4) Fail for start up (following AP1 for outdoor unit control board)
Mainly detect:
Whether the compressor wiring is connected correct?
Is time for compressor stopping enough?
Is compressor broken?
N
170
Power on the unit
Is stop time of the compressor
longer than 3 minutes?
Y
Does startup fail?
Y
Are the wires for the compressor connected
correctly? Is connection sequence right?
Y
Replace the control panel AP1
If the fault is eliminated?
N
Replace the
compressor
End
N
Restart it up after 3 minutes
Connect the wires as per the
N
connection diagram
Y
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