Trane S9V2B040U3PSBC/D Installation, Operation And Maintenance Manual page 116

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
DEFINITION: External Gas Valve
Circuit Error (24 volts is present
when it should not be present)
DEFINITION:
Internal control board error
Redundant HLO relay closed
when it should not be
116
7.1 Fault Code
Remove any hea ng
call
Is 24 VAC nominal voltage present
between Red lead at gas valve
connec on to chassis ground?
NO
Replace IFC
7.2 Fault Code
Replace IFC
Correct wiring
YES
Check opera on
S9V2-SVX001-1A-EN