Sinclair SDV5 Series Service Manual page 70

2.23.7 L8 / L9 troubleshooting
Compressor wiring is not properly
The resistance between 3 phases of
The insulation resistance of
compressor is less than 100Ω
The compressor has less than 12
hours preheating before initial
Replace the compressor inverter
board, restart the unit and the error
Refer to P1 or P3 troubleshooting
2.23.8 L1: Procedure
Voltage of power supply is 166-265V?
Check the wiring between main control board and
Repower on and waiting for 10S,and then test the
voltage of CN4 port "RL" and "12V" port to check
whether their voltage is DC 12V
L8/L9
No
compressor is over 5Ω
No
No
operating
No
is solved
No
L1
Yes
filter board is correct or not.
Yes
Yes
Replace outdoor filter board
Reconnect the cables based on
Yes
wiring diagram
Yes
Replace the compressor
Yes
Yes
Ensure enough preheating time
Yes
Normal
No
Provide normal power supply
No
No
Replace outdoor main PCB
Connect again
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