Lennox M33A036S4-1P

Lennox Mini-Split Service Manual / Page 160
E6 Fault Code
Basic Description:
PFC module protection. (For MPA036S4M-1P and MPA048S4M-1P)
General Note:
When the voltage signal that PFC sends to main control board is abnormal, the
display LED will show “E6” and AC will turn off.