Midea ESG-Inv M Series - Page 68

ESG-Inv M
67
Part 5 – Diagnosis and Troubleshooting
Situation 2: L1 or L2 error appears after the compressor has been running for a period of time and the compressor speed
is over 20rps
L1 /L2
Power supply is abnormal
Yes
Re-start the unit once the power supply
has returned to normal
No
DIP Switch S1 setting is wrong
Yes
Refer to the wiring diagram to reset the
S1 setting
No
Replace the inverter module
1
Notes:
1. When replacing an inverter module, a layer of thermally conductive silica gel should be painted on IPM module (on the reverse side of the inverter module
PCB).
L5/L7 troubleshooting
L5/L7
The wire is not connected properly
Yes
Ensure wire is connected properly
No
Inverter module PCB has malfunctioned
Yes
Replace inverter module PCB
1
No
Replace the compressor
Note：
1. When replacing an inverter module, a layer of thermally conductive silica gel should be painted on IPM module (on the reverse side of the inverter module
PCB).
L3 troubleshooting
L3
Replace the inverter module PCB
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