Trane S8B1A040M3PSC Installation, Operation And Maintenance Manual page 58

I I n n t t e e g g r r a a t t e e d d F F u u r r n n a a c c e e C C o o n n t t r r o o l l D D i i s s p p l l a a y y C C o o d d e e s s
e6.2
e6.3
e7.!
e08
e11
e12
58
Bad grounding
(1) Igniter relay fails
(2) Igniter open
1st stage gas valve (MVL) is energized when it should be off
Flame current is low, but still strong enough to allow operation
(1) 1st stage gas valve not energized when it should be
(2) 1st stage gas valve relay stuck closed
(3) 2nd stage gas valve relay stuck closed (Not Applicable for S8B1, S8X1)
(4) 2nd stage gas valve energized when it should not be (Not Applicable for S8B1, S8X1)
(5) 2nd stage gas valve not energized when it should be (Not Applicable for S8B1, S8X1)
Open fuse
S8XB-SVX001-1B-EN