Midea M3OF-27HFN1-M - Indoor Units Mode Conflict

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7.4.1.10 Indoor units mode conflict
Error Code
P5(old model) or - -(new model)
Malfunction conditions
The indoor units cannot work cooling mode and heating at same time.
Heating mode has a priority.
Potential causes
● Suppose Indoor unit A working in cooling mode or fan mode, and
indoor unit B is set to heating mode, then A will change to off and
B will work in heating mode.
● Suppose Indoor unit A working in heating mode, and indoor unit
B is set to cooling mode or fan mode, then B will change to stand
by and A will be no change.
Cooling mode
Heating Mode
Fan
Off
Cooling mode
No
Yes
No
No
Heating Mode
Yes
No
Yes
No
Fan
No
Yes
No
No
Off
No
No
No
No
No: No mode conflict;
Yes: Mode conflict