Midea V6R VRF Series Service Manual page 109

V6R VRF 50Hz
L0: Inverter module protection
Check whether the compressor wiring is
properly connected.
Disconnect the Measure whether resistance between 3
power supply phases of compressor is below 5Ω.
Measure the insulation resistance of
compressor. Is it greater than 100KΩ?
Is the module in well heat dissipation?
Does the compressor have 12 hours
No
Assure enough
preheating before 1
preheating time
installation?
Switch on power again to detect whether
the compressor can start
Refer to 0 P3 over current protection
108
L0 Fault
L0 Protection
Yes
Yes
Yes
Yes
Yes
st
operating after
Yes
Yes
Refer to P3 protection
No
Reconnect the cables based
on wiring diagram
No
Replace the compressor
No
No
Is the IPM screws fastened?
Yes
Is the silica gel coated well
for heat radiation?
Yes
No
Replace the inverter module
No
Fasten IPM screws again
No
Coat with silica gel