Midea MFA-12HRN1 General Information Manual page 34

Troubleshooting
5. Running lamp and Defrosting lamp flash at 5Hz, the Timer lamp light
Running lamp and Defrosting lamp flash at 5Hz, the Timer lamp light
Judge 1: Check whether the wiring of DC fan is break off
6. Running lamp and Timer lamp flash at 5Hz, the Defrosting lamp light
Running lamp and Timer lamp flash at 5Hz, the Defrosting lamp light
Judge 1: Check whether the EEPROM is inserted well
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DC fan malfunction
Judge 2: Check whether the DC fan is failure
Replace the indoor main board
EEPROM malfunction
Judge 2: Check whether the EEPROM is ok
Replace outdoor main board
No
No
Yes
Yes
MCAC-UTSM-2009-03
Yes
Connect the wiring well
Yes
Replace the DC fan
No
Insert the EEPROM
No
Replace the EEPROM
Outdoor Units
well