Lennox LM036CI-100P232-1X

33
Installation and Maintenance
Service Manual
9.2 Procedure of Troubleshooting
9.2.1 F1~F5 Malfunction
Start
Insert the temperature
sensor tightly
yes
M alfunction is
eliminated.
Make the parts upright
yes
Malfunction is
eliminated.
Replace the controller with
one of the same model
End
no
no
no
no
yes
ye
s
Malfunction is
removed.
no
yes
yes
no
Is the wiring
terminal between temperature
sensor and the controller loosened or
poo rly contacted?
Is there short circuit due to trip over
of the pa rts?
Is the temperature
sensor normal according to the
Resistance Table?
Replace it with a
temperature sensor
of the same model