Midea MCH5U-48PHH2

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