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Maytag POF1HD140AVFA Installation, Operation And Maintenance Manual page 21

Oil fired warm air furnaces, up-flow model with ecm
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IDLE STATE
THERMOSTAT CALLS FOR HEAT
SAFETY CHECK FOR FLAME
NO FLAME
BURNER MOTOR & IGNITOR START
10 SEC.
SAFETY CHECK FOR FLAME
NO FLAME
SOLENOID VALVE OPENS
TRIAL FOR IGNITION
BURNER FLAME MONITORED
FLAME
CARRYOVER STATE
Provides continuous spark
LED diagnostic light ON
Start Carryover Timer
FLAME
CARRYOVER TIMER EXPIRES
FLAME
RUN STATE
Igniter turns off.
THERMOSTAT SATISFIED
OIL PRIMARY CONTROL
SHUTS OFF:
Burner Motor
Solenoid Valve
30 SEC.
SAFETY CHECK FOR FLAME
NO FLAME
RETURNS TO IDLE STATE
REMAINS IN IDLE STATE
(5 SEC.)
FLAME
(5 SEC.)
FLAME
NO FLAME
FLAME LOST
FLAME LOST
FLAME LOST
(5 SEC.)
FLAME
OIL PRIMARY
CONTROL
SEQUENCE of
OPERATION
LOCKOUT STATE
OIL PRIMARY CONTROL:
Shuts off burner motor
Shuts off igniter
Shuts off Solenoid Valve
Fast Flashes LED Diagnostic
Light
TO EXIT LOCKOUT
PRESS RESET
RECYCLE TIMER STARTS
OIL PRIMARY CONTROL:
Shuts off Solenoid Valve
Shuts off Igniter
Shuts off Burner Motor
Slow Flashes LED
diagnostic light
RECYCLE TIMER EXPIRES
(60 SECONDS
21

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