Trane S9V2B040U3VSB Installation, Operation And Maintenance Manual page 105

DEFINITION:
Igniter Relay Fault – The control board has sensed
that the igniter relay has stuck closed
Ignitor Fault – The control board has sensed that
the ignitor circuit is open or shorted.
S9V2-VS-SVX001-1C-EN
6.3 Fault Code
Make a call for 1
stage hea ng
Igniter is good Does igniter
YES
Replace IFC glow?
NO
Is 120 VAC
measured between
IGN-H and IGN-N?
YES
YES
Verify igniter harness is
not damaged and
connectors are ght
Disconnect electrical
power to the furnace
Disconnect igniter
and check resistance
Is resistance
Replace ignitor. reading between 37
NO
Check opera on – 70 ohms?
(at ~75F)
YES
Igniter is good
st
NO Replace IFC
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
105