Midea 9V SERIES - 9.1 Indoor Unit Errors Continued; 9.2 Diagnosis and Solutions Overview; 9.2.1 E1 Error Diagnosis

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E2 Zero-Crossing Error
E3 Indoor fan speed out of control
E4 Over current protection occurs 4 times
E5 Open or short circuit of Room temperature sensor
E6 Evaporator temperature sensor open or short circuit
9.2 Diagnosis and Solution
9.2.1 E1 (EEPROM parameter error) error diagnosis and solution
Replace indoor PCB
Shut off the power supply and turn on it 5s later
The problem comes out again
Is the EEPROM chip plugged in indoor PCB well?
NO
Correct the connection
Replace the main PCB of indoor unit