© 2022 Staheli West
141
Faults
Fault 45: Low Fire Switch Off / Louver Low Fire Position Is Set Abnormally High
Indicates
Low Fire Switch was not on during main oil ignition (
Low Fire Switch turning on is required during
main oil ignition).
Causes
Troubleshooting
Fixes
• Burner low fire tuned too high.
• Menu > Settings > Tune Burner:
is low fire tuned above 39%?
• If smoke cannot be cleared
below 39%, see causes below or
Fault 307.
• Load defaults (Menu > Settings
> Tune Burner > Load Defaults).
Confirm that the louver lighting
position in advanced settings is
below 35%.
• Tune burner below 35%.
• Update machine version to
3.1 or higher (2.4 for 2015-2016
Machines).
• Faulty louver actuator.
• Menu > Operations >
Manual
Mode and move the louver
position to test for proper
function.
• Replace louver actuator.
• Low and high fire nozzles
switched (This can cause the
fault because the operator will
tune the burner too high to clear
smoke).
• Remove burner gun assembly
and assure that the bigger 19.5
nozzle is on the tube that is
connected to the T fitting on the
end of the gun assembly.
• Swap fuel nozzles (ensure
they are installed in their proper
location).
• Faulty ABD-2 relay (Panel 2).
• Menu > Operations >
Manual
Mode and adjust the louver
below 35%. Ensure that the ABD-
2 light turns on.
• Swap with ABD-1 to test for
functionality.
• Replace ABD-2 relay (Spare
found in Panel 1).
• Loose fuel nozzle(s) (This can
cause the fault because the
operator will tune the burner too
high to clear smoke).
• Remove burner gun assembly
and check for loose nozzles.
• Tighten nozzles.
• Fuel pump pressure too high.
• Check fuel psi on touch screen
(150 psi is standard).
• Adjust fuel pump pressure to
150 psi.
• Airflow path obstructed.
• Check burner intake airflow
path.
• Remove obstructions.
• Faulty wiring.
• Inspect the wiring for ground,
continuity, and proper voltage.
• Replace/Repair wiring.
Fault 46-127: Call Service
• Check wiring behind the burner controller.
• Replace the burner controller.
