Trane S8B1A040M3PSC Installation, Operation And Maintenance Manual page 61

GETTING STARTED
Is the IFC Seven
Segment LED on? NO
YES
What is the fault
code? See FAULT
LED Codes page
Go to L6F
DEFINITION :
Internal Failure of the Control Board
S8XB-SVX001-1B-EN
Is 120 VAC
measured at NO
transformer?
YES
YES
Is 24 VAC
measured at NO Replace Xfmr
transformer?
YES
Is 24 VAC
measured at TH
NO
and TR at IFC?
YES
Replace IFC
Is 120 VAC measured
NO
between Line and
Neutral at the IFC?
Repair wiring
Refer to Gas Furnace Silicon Nitride igniter Models
Service Manual to supplement this informa on.
Publica on Number 34-3405-09
E01 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
Is 120 VAC
measured
between Line NO Repair high voltage
and Neutral at J-
box?
YES
Verify Panel Loop is
connected
61