Midea MCH2U-18PHH2 Service Manual page 72

8.4.2.6 E6 (PFC module protection) error diagnosis and solution.
Error Code
Malfunction
conditions
Potential causes
Trouble shooting:
E6
When the voltage signal that PFC sends to main control board
is abnormal, the display LED will show "E6" and AC will turn
off.
● Wiring mistake
● Faulty outdoor PCB
● Faulty inductance of PFC module
●
PFC module malfunction
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