Lincoln Impinger Conveyor Ovens 1634-000-EA - Manual (Page 7)

Low Profile – 1600 Advantage Series Service Manual – International 7
Fuse holder Check, replace if necessary.
Gas pressure switch Check for supply voltage to neutral
(internal to gas valve) on both sides of switch. If voltage is
present on one side of switch only,
check the following. Check for proper
gas pressure supply to gas valve.(Marked
on oven spec. plate.) Check for proper
adjustment of gas pressure switch.
should be set at 10 Nat., 27 for L.P.
or 4.5 for town gas. Check gas filter in
gas valve for blockage or damage. (See
Adjustment section for location.)
If the above checks OK, but switch is
still not closed replace gas valve.
Oven air pressure switch Check for supply voltage on both sides
of switch. If voltage is present on one
side only, check for air tube blockage.
Adjust air pressure switch. If the above
fails, replace air pressure switch.
Hi-limit thermostat Terminals are normally closed. If open,
reset and test oven for proper operation.
If thermostat will not hold for maximum
oven temperature, and oven is not
exceeding maximum temperature dial
setting, check for proper location of
capillary bulb in its spring holder.
If above checks OK, replace hi-limit.
Ignition control Check for supply voltage to ignition
control at terminal #1 and neutral.
If voltage is not present, trace wiring
back to hi-limit thermostat. Check for
supply voltage at terminal #6 to neutral.
If no voltage is present, wait 30 seconds
and check reset button. If above fails,
replace ignition control.
Burner reset switch Switch is normally open. Check to see
that the switch closes when reset button
is pushed. Replace as needed.
Burner blower motor Check for supply voltage to burner
blower motor.
WITH POWER OFF: Turn blower
wheel to check for locked rotor. If
supply voltage is present and motor does
not run, replace motor.
Burner blower motor Check for supply voltage switching to
Air pressure switch terminal N. O. as the air pressure switch
closes. Check for air tube blockage or
misalignment, adjust air pressure switch.
If the above fails, replace air pressure
switch.
Spark generator After a pre-purge time of 30 to 60
seconds after blower motor starts,
check for supply voltage to spark
generator. If voltage is not present,
Check reset button located on rear of
control box. If voltage is still not
present, replace ignition control.
If voltage is present, visually check
for spark at igniter head.
Igniter/sensor assembly Check for visible damage to igniter/
sensor assembly. If there is no visible
damage to the components, and no spark,