Midea MSH-07CRN1, MSH-07HRN1, MSH-09CRN1, MSH-09HRN1, MSH-12CRN1, MSH-12HRN1 Manual page 302

11.1.6
Display
E6
Is connection to connector good?
Replace the sensor
11.1.7
Display
P0
Is connection to connector good?
Is the wires to compressor right
Check the outdoor inverter module.
Is it breakdown between P-N,P-U,P-V;N-W,N-U,N-V
At inverter module
Check compressor
Room temperature or evaporator temperature sensor open or short circuit of
yes
yes
Yes
No
LED STATUS
No
Repair connector
LED STATUS
Module protection
No
Repair connector
Yes
Inverter module is defective
301