Gree Dettson LOMO 19 Installation Manual page 77

4. Start-up failure LC (following AP1 for outdoor unit control board)
Main detection points:
(1) compressor wire (2) compressor (3) charging amount of refrigerant
Malfunction diagnosis process:
No
74
Power on the unit
Is stop time of the compressor
longer than 3 minutes?
Yes
Does startup fail?
Yes
Are the wires for the compressor connected
correctly? Is connection sequence right?
Yes
Replace the control panel AP1
If the fault is eliminated?
No
Replace the
compressor
End
Restart it up after
No
3 minutes
Connect the wires as
No
per the connection
diagram
Yes
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