19
IX800 Operation & Service Manual
P/N 974-
4135
Rev: 2.51
Burner blower starts, no spark, no flame
Symptom
Possible Problems
Error Light
Single error light flash on ignition
controller after 30 seconds.
Air switch failure.
1
Air switch set to too high a pressure.
1
Air tubes plugged or installed in
wrong air switch position.
1
Burner motor won’t turn on if any draft
is present. One error flash on ignition
controller.
Air switch set to too low a pressure.
1
Burner motor runs from power up. When
start button is pushed green light is on
and one error flash on ignition controller.
Ignition controller failure. (Ignition
controller F1 terminal powered.)
1
Burner motor relay failure.
1
No spark after 30 seconds prepurge (no
visible arcing). Three error flashes on
ignition controller. Burner motor shuts
down after 45 seconds of postpurge.
Ignition transformer failure.
3
Igniter shorting to ground.
3
Cracked spark plug ceramic insulator.
3
Burner blower starts, spark, no flame
Symptom
Possible Problems
Error Light
Burner motor starts but no flame after 30
seconds prepurge. Three error flashes
on ignition controller.
Top RTD or RTD controller-related
failure.*
3
Flame rod and spark plug wires
reversed.
3
Manual valve closed.
3
Solenoid valve failure.
3
Upstream regulators installed
backwards.
3
Inlet pressure too high.
3
Burner won’t ignite or occasionally
ignites with poor combustion. Three error
flashes on ignition controller.
Strainer plugged or dirty.
3
Manifold pressure set too low.
3
Burner orifices plugged or dirty.
3
Burner air inlet obstructed.
1