Midea MCH2U-18PHH2 Service Manual page 55

8.4.1.8 Compressor drive malfunction diagnosis and solution
The trouble shooting is same with one of IPM module protection.
Water-level alarm malfunction
8.4.1.9
Malfunction conditions
Potential causes
diagnosis and solution
If the sampling voltage is not 5V, the LED will display the failure code.
● Wiring mistakes
● Faulty water-level switch
● Faulty water pump
● Faulty indoor PCB
55