Midea MV6-i900WV2GN1-E - Page 102

V6-i VRF 50/60Hz
101
Part
6 - Diagnosis and Troubleshooting
L8: Compressor frequency variation greater than 15Hz within one second protection 2.13.11
L9: Actual compressor frequency differs from target frequency by more than 15Hz protection
L8 protection
ODU stop valves are closed Open the ODU stop valves
Reconnect the cables based on
wiring diagram
The resistance between 3 phases of
compressor is over 5Ω
Replace the compressor
The insulation resistance of
compressor is less than 100Ω
Replace the compressor inverter
board, restart the unit and the error is
solved
Refer to P1 or P3 troubleshooting
No
Yes
Disconnect the
power supply
Compressor wiring is not properly
Yes
Normal
Yes
Yes
Yes
No
No
No
No
L9 protection
The compressor has less than 12 hours
preheating before initial operating
Ensure enough preheating time
Yes