Lennox LI009HI-160T432 Service Manual page 59

(7) Malfunction of PFC Protection (HC)
Main check point:
Whether power supply is normal?
Malfunction diagnosis process:
Check whether power supply is
56
Start
normal
Is power abnormal?
No
Replace main board of
outdoor unit
End
Turn on the unit again
Yes
after the power is
resumed
Service Manual
Installation and Maintenance