Trane A952V040BU3SB Installation, Operation And Maintenance Manual page 115

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
A952V-SVX001-1B-EN
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
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
YES
Check opera on
115