Midea SMK-60/CGN8, Service Manual

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M‐Thermal Split
76 201909
Midea M‐Thermal Split Ser
vice Manual
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
Relay on outdoor unit main PCB is open
Yes
Replace the outdoor unit main PCB
No
Replace the inverter module 2
Notes:
1. If the fan motor is running and the DC voltage between terminals P and N on inverter module declined, Relay on the main control board ofoutdoor
unit is open
.
2. 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). Refer to Figure 4‐4.1.
relay
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