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SEQUENCE OF OPERATION CHART
Apply Power
to Appliance.
Is Damper
Closed?
Y
Is there a
Call for Heat.
Is Damper
Open?
Will not attempt to light 2
flash error code. See
Corrective Action Table
on page 30.
N
Damper Energizes.
Gas Valve attempts to open damper
for 30 seconds, then waits 2 mintues.
3 flash error code. See Corrective
Action Table page 30.
N
Pilot Valve
Energizes
Does Pilot
Valve Open?
Spark Electrode
is Energized
Is
Pilot Flame
Sensed Within
1.5 min. ?
Main Valve
Energized
Does Main
Valve Open?
Is Main
Flame Sensed?
Is Demand for
Heat Satisfied?
Pilot & Main
Valve De-Energize.
Is Flame
Sensed?
Damper Energizes
and Closes.
Will not light. 8-4 flash
error code. See Corrective
Action Table on page 31.
N
Will not light. 8-4 flash
error code. See Corrective
Action Table on page 31.
N
Will not light. 8-4 flash
error code. See Corrective
Action Table on page 31.
N
Will not light. 8-4 flash
error code. See Corrective
Action Table on page 31.
N
Will not light. 8-4 flash
error code. See Corrective
Action Table on page 31.
N
Wait for flame lost, 5 flash
error code. See Corrective
Action Table, page 31.
Y
Damper closes, 20 minute
lockout, 6-4 flash error
code. See Corrective
Action Table, page 31.