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Defini on
The IFC has detected that internal gas valve relays have failed
nd
OR 24 VAC is being sensed at 2
stage gas valve
Defini on:
The onboard 5 amp fuse is open or missing.
Start unit and measure amp
draw on transformer 24VAC red
wire (accessories turned OFF)
Correct low voltage wiring
Field wiring shorted
Unit wiring shorted
S9V2-VS-SVX001-1C-EN
Remove any hea ng
Is 24 VAC nominal voltage present
between Brown lead at gas valve
connec on to chassis ground?
12 Fault Code
Apply power to the
Replace fuse
YES
the fuse terminals?
Turn on each accessory (if
installed) and measure amp
Is amp draw less
NO
draw. If amp draw exceeds
than 5 amps?
fuse ra ng, correct wiring
associated with that accessory
YES
Possible Causes
11 Fault Code
call
YES
NO
Replace IFC
unit
Is 24 VAC
measured across
NO
T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g
Correct wiring
Check opera on
Is fuse fully
Properly seat the
seated into
NO
fuse
connector?
YES
Replace IFC
109
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