V6R VRF 50Hz
108
Midea
V
6R
Series S
er
vice M
anual
L0: Inverter module protection
Yes
Measure whether resistance between 3
phases of compressor is below 5
Ω.
Replace the compressor
Check whether the compressor wiring is
properly connected.
Reconnect the cables based
on wiring diagram
Yes
Yes
No
No
Is the IPM screws fastened?
L0 Fault
Measure the insulation resistance of
compressor. Is it greater than 100K
Ω?
No
Is the module in well heat dissipation?
Fasten IPM screws again
Is the silica gel coated well
for heat radiation?
Coat with silica gel
Does the compressor have 12 hours
preheating before 1
st
operating after
installation?
Switch on power again to detect whether
the compressor can start
Refer to 0 P3 over current protection
Replace the inverter module
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
Assure enough
preheating time
No
Disconnect the
power supply
L0 Protection
Refer to P3 protection
