Ignition control

After 45 seconds of hot surface igniter pre-heat, the ignition

 

 

control will switch 24 VAC to the gas control valves. Check for

 

 

24 VAC output from the ignition control, across terminals

 

 

marked “valve” and “valve gnd”. If no voltage is present, replace

 

 

the ignition control.

 

 

NOTE: The ignition control contains a safety lockout circuit. If a

 

 

flame is not detected within 6 seconds after the gas control

 

 

valve is energized, the ignition control will lockout. To reset, turn

 

 

the power switch “off”, wait 45 seconds and switch the system

 

 

“on” to retry ignition.

 

Gas control valves

Check for 24 VAC supplied to the gas control valves. If voltage

 

 

is present, the valves should open. Check for gas pressure at

 

 

the pressure tap, located in the gas piping just prior to the

 

 

burner. If there is no gas pressure, and the voltage is supplied to

 

 

the valves, check piping for obstructions. If there are no

 

 

obstructions, replace gas control valves.

Flame will not stay lit

Hot surface igniter

The ignition control will keep the gas control valves energized

 

 

for 6 seconds. At the end of 6 seconds, the hot surface igniter

 

 

must sense a flame, or the ignition control will go into lockout.

 

 

(The ignition control requires a minimum of 0.8 micro-amps DC)

 

 

To check the flame sensing operation, connect a digital

 

 

multimeter (capable of measuring DC micro-amps) between the

 

 

“GND burner” terminal on ignition control and the ground wire.

 

 

NOTE: This is a current measurement and the meter must be

 

 

connected in series.

 

 

If these readings are not achieved, check bypass orifice for

 

 

obstructions, if bypass orifice is clear, replace the hot surface

 

 

igniter.

 

 

NOTE: The DC micro-amp test must be conducted with the oven

 

 

in low flame (bypass) operation. Set the temperature control to

 

 

its lowest setting.

 

Power supply

If there is sufficient micro-amp current, but the flame will not stay

 

 

lit, check for proper polarity of the 120 VAC power supply.

 

Ignition control

If there is sufficient micro-amp current, and the 120 VAC polarity

 

 

is correct, but the flame will not stay lit, replace the ignition

 

 

control.

 

 

NOTE: check for proper ground connection of the ignition

 

 

control.

 

NOTE: Flame should

 

 

be lit at this time

 

Low flame is on, but no

Control transformer

Check for 120 VAC supply to the primary of the control

main flame

 

transformer. If no voltage is present, trace wiring back to the

 

 

oven power relay. If voltage is present, check for 24 VAC at the

 

 

transformer secondary. If there is primary voltage but no

 

 

secondary voltage, replace control transformer.

6

Low Profile – 1600 Series Advantage Digital Service Manual – Domestic

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Lincoln 1600-000-A, 1601-000-A service manual

1601-000-A, 1600-000-A specifications

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