Trouble-Shooting - RBI Dominator Series Installation & Operating Instructions Manual

TROUBLE-SHOOTING

PROBLEM
Unit Sparks But Will Not Fire
Pilot Lights But Unit Will Not Fire
Insuffi cient Heating
Unit Consistently Shuts Down
On Limit
Bad Combustion
(High CO, Yellow Flames)
Gas Flow Shuts Down During
Operation (Blowers Remain On)
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POSSIBLE CAUSES
Low gas pressure
Pilot valve manual knob closed
Pilot wires disconnected
Low pilot pressure
Pilot valve malfunctioning
Bad fl ame sense lead from ignitor to fl ame
sense module
Manual valve(s) closed
Low manifold pressure
Main valve(s) malfunctioning
Target temperature too low
Primary (safety high) limit set too low
Primary (safety high) limit set to low
Insuffi cient air
Dirty inlet air fi lter
Too much air
Low air (blocked fl ue/inlet) condition
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CORRECTIVE ACTION
Check gas supply pressure, adjust as necessary
Open pilot valve manual knob
Reconnect wires
Check pilot pressure, adjust as necessary
Replace pilot valve
Check ground connections, adjust as necessary
Remove upper front jacket panel, open manual
valve(s)
Check manifold pressure, adjust as necessary
Replace main valve(s)
Increase stage control target temperature
Increase limit sett ing
Increase limit sett ing
• Check CO, adjust blower inlet damper(s) to
increase airfl ow
• Check for plenum air leakage from lower front
jacket panel seams, repair as necessary
Remove, inspect and clean inlet air fi lter as
necessary
Check CO, adjust blower inlet damper(s) to
decrease airfl ow
• Check indicator board for low air indication
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
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