DOMINATOR INSTALLATION AND OPERATION INSTRUCTIONS
Page 38
Trouble-Shooting
PROBLEM
POSSIBLE CAUSES
CORRECTIVE ACTION
Unit Does Not Spark
continued
Spark generator fault
• Check spark generator wiring
Unit Sparks But Will Not Fire
Low gas pressure
Check gas supply pressure, adjust
as
necessary
Pilot valve manual knob closed
Open pilot valve manual knob
Pilot wires disconnected
Reconnect wires
Low pilot pressure
Check pilot pressure, adjust as
necessary
Pilot valve malfunctioning
Replace pilot valve
Pilot Lights But Unit Will Not Fire
Bad fl ame sense lead from ignitor
Check ground connections, adjust
to fl ame sense module
as necessary
Manual valve(s) closed
Remove upper front jacket panel,
open
manual
valve(s)
Low manifold pressure
Check manifold pressure, adjust as
necessary
Main valve(s) malfunctioning
Replace main valve(s)
Insuffi cient Heating
Target temperature too low
Increase stage control target
temperature
Primary (safety high) limit set
Increase limit setting
too
low
Unit Consistently Shuts Down
Primary (safety high) limit set
Increase limit setting
On Limit
too low
Bad Combustion
Insuffi cient air
• Check CO, adjust blower inlet
(High CO, Yellow Flames)
damper(s) to increase airfl ow
• Check for plenum air leakage
from lower front jacket panel
seams, repair as necessary
Dirty inlet air fi lter
Remove, inspect and clean inlet air
fi
lter
as
necessary
Too much air
Check CO, adjust blower inlet
damper(s) to decrease airfl ow
Gas Flow Shuts Down During
Low air (blocked fl ue/inlet)
• Check indicator board for low
Operation (Blowers Remain On)
condition
air indication
• If condition exists, check
inlet,
fl
ue,
chimney
for
blockage
• Check combustion air/ventilation
openings
in
space
• Check inlet air fi lter, clean/replace
as
necessary
