Lennox LNINVE052 Service Manual page 67

3. Malfunction of Protection of Jumper Cap C5
Main detection points:
● MalfunctionIs there jumper cap on the mainboard?
● Is the jumper cap inserted correctly and tightly?
● The jumper is broken?
● Detectioncircuit of the mainboard isdefined abnormal?
Malfunction diagnosis process:
Troubleshooting for C5
Is there jumper cap on the
the jumper cap inserted
Replace the jumper cap
Replace the mainboard
with the same model.
64
malfunction
mainboard ?
yes
no
Is
correctly and
tightly ?
yes
no
with the same model
Is malfunction
eliminated
no
End
Appearance of
no
the jumper cap
Assemble the jumper
cap with the same
model
Is malfunction
eliminated
no
Insert the
jumper cap
tightly
Is malfunction
yes
eliminated
yes
yes
Service Manual
Installation and Maintenance