Lennox MPA030S4M-1P

Lennox Mini-Split Service Manual / Page 209
EC Flow Chart
EC
Power off then restart the unit in 2 min-
utes.
Yes
Yes
Check the T2 sensor. Is
it functioning
Check to see if cool air is blowing out of
the indoor air outlet
No
Yes
Replace the indoor PCB
Check for refrigerant leaks.
No
Yes
Repair leaks and re-
charge system.
Check for restriction in refrigerant lines.
Clear restriction.