Midea MS11M-09HRFN1-BW0W Service Manual page 34

9.3.3 Zero crossing detection error diagnosis and solution (E2)
Error Code
Malfunction decision
conditions
Supposed causes
Trouble shooting:
Check if the connections and
power supply is normal?
Yes
Indoor main PCB is
defective. Replace indoor
main PCB.
E2
When PCB does not receive zero crossing signal feedback for 4
minutes or the zero crossing signal time interval is abnormal.
Connection mistake
●
PCB faulty
●
No
Correct the connections. Turn on the
unit when the power supply is good.
32