Lennox LI012CI-170P432-1 Service Manual page 62

Service Manual
3. Malfunction of Protection of Jumper Cap C5
Main detection points:
● Is there jumper cap on the mainboard?
● Is the jumper cap inserted correctly and tightly?
● The jumper is broken?
● The motor is broken?
● Detection circuit of the mainboard is defined abnormal?
Malfunction diagnosis process:
Is there jumper cap on the mainboard?
Installation and Maintenance
Start
Yes
Is the jumper cap inserted correctly
and tightly?
Yes
Replace the jumper cap with
the same model
Is malfunction
eliminated
No
Replace the mainboard
with the same model
End
No
Assemble the jumper
cap with the same model
Is malfunction
No
eliminated
No
Insert the jumper
cap tightly
Is malfunction
No
eliminated
Yes
Appearance of the
jumper cap
Yes
Yes
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