Lennox MPA030S4M-1P - F3 Fault Code

Lennox Mini-Split Service Manual / Page 218
F3 Fault Code
Basic Description:
Compressor discharge temperature sensor error
General Note:
When the compressor discharge temperature(T5) is more than 115°C for 10 seconds,
the compressor will stop and restart till T5 is less than 90°C.