Lennox Mini-Split Service Manual / Page 234
P5 / -- Fault Code
Basic Description:
Mode confl ict.
General Note:
The indoor units cannot work cooling mode and heating mode at the same time.
Heating mode has priority.
• 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 confl ict.
Yes = Mode confl ict
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