Trane A801X040AM3SDA/B Installation, Operation And Maintenance Manual page 55

DEFINITION
An error has occurred with the PS1, indica ng that the pressure
switch is closed when it should be open.
In most cases, the pressure switch is not the problem.
NOTE: Verify pressure switch wiring and tube rou ng
are correct.
correct, replace IFC
A801X-SVX001-1C-EN
Verify wiring. If
NO
3.1 Fault Code
Cycle power OFF to the
furnace and remove
.
Orange wire from PS1.
,
Is con nuity (0 ohms)
YES
measured across PS1?
See Note #1
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
Note #1
OL = Open Switch
0 ohms = Closed Switch
Replace pressure
.
switch and verify
opera on
55