Trane S8V2A040M3PC Installation, Operation And Maintenance Manual page 67

DEFINITION
Limit switches are safety devices
that will open when an abnormal
high temperature has been sensed.
REMOVE ALL JUMPER WIRING TO
SWITCHES!
Under no circumstances, shall these
switches be le jumpered when not
troubleshoo ng.
Is the burner orifice size
NO
56? Or matched to
Installer Guide for LP?
Install correct size
orifices
check opera ons
Check burner alignment
Correct as needed
S8V2-SVX001-1A-EN
Is LP gad being
YES
Disconnect electrical
YES
power to furnace
Correct as needed
YES
Check opera on
pitched correctly
Repair flue pipe for correct sizing
and long horizontal runs or slope
less than
correct as needed
Remove, clean, and
reassemble burners.
Push RED reset on
both rollout switches
NO
Check opera on
burners impinging on
YES
4.2 Fault Code
Roll-Out Limit
used?
NO
Is flue piping
sized and
NO
per linear foot.
1/4 "
Are all burner flames directed
Cycle power to
furnace and call
for heat
Igni on occurs
Do all burners
ignite within 5
NO
seconds?
YES
Are flames from
sides of heat
exchanger?
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
into heat exchanger with a
YES
ght pa ern? (inadequately
aired burners tend to roll
back)
NO
When fan comes
NO
on, do flames
stay consistent?
YES
Replace Roll out
switch
Check opera on
Check combus on air
blower, ven ng, heat
exchanger for blockage
(i.e. soo ng)
Replace heat
exchanger
Check opera on
67