Welbilt Lincoln Impinger 1600 Series, Международное руководство по обслуживанию

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26 Document #: LIN_GO_SM_IMPLOPRO_S1600_INTL_4605727 – 9/20
Troubleshooting Section 5
PROBLEM CAUSE CORRECTION
Oven will not heat – Serial
Number L31478 and Below Oven power relay Check for line voltage to the relay coil. If no voltage is present, trace wiring
back to the control box hi-limit thermostat(s). If voltage is present, check
to ensure contacts are closing. Replace relay as needed.
Fuse, burner 3A Check, replace if necessary.
Fuseholder Check, replace if necessary.
Gas pressure switch (internal to
gas valve) Check for supply voltage to neutral 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 for Nat.,
27 for LP, or 4.5 for town gas. Check gas filter in gas valve for blockage or
damage. (See
Section 7 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 air
pressure switch Check for supply voltage switching to terminal NO 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, replace the spark generator. If
there is visible damage to the igniter/sensor assembly, replace. Also check
for frayed or damaged wires in burner tube.
Gas valve Check for supply voltage to gas valve. If there is no voltage present, check
reset button. Check all connections for tightness. If there still is no voltage
at gas valve, replace ignition control. If there is voltage present, check for
gas pressure at gas pressure tap located in gas piping at burner manifold.
If there is no gas pressure, replace gas valve.
Flame will not stay on –
Serial Number L31478 and
Below Flame sensor To check for flame sensor operation, connect a digital multimeter (capable
of measuring DC micro amps) in series with the flame sensor wire and
ignition control. Sensor current is 3 micro amps DC minimum. NOTE:
The DC micro amp test must be conducted with the oven in low flame
(bypass) operation. Turn the temperature control to its lowest setting. If
these readings are not achieved, replace igniter/sensor assembly. Also,
check for any type of damage to flame sensor wire and connections.
Ignition control If there is sufficient flame sensor current, but the burner will not remain
ignited, check the reset button on ignition control. NOTE: Check for proper
polarity of the power supply. If all of the above are OK, replace ignition
control.