Lincoln 1100 Series Service Manual page 19

Cooling fans continue to
run after 20 minute cool down
Oven will not heat
Impinger II –1100 Series Service Manual - Domestic
Cooling Fan Thermostat
Main Fan Relay
Gas Supply
Main Fan
Heat Switch
Fuse 10 amp
Fuseholder
Centrifigual Switch of Main
Fan Motor
(Oven Cavity) High Limit
Burner Blower Motor
Control Box High Limit
thermostat
NOTE: Discontinued S/N
2011383
Centrifigual Switch of Burner
Blower Motor
Burner Transformer
Ignition Control
Thermostat should close at 120° F 5° F and open at
100° F 5° F.
Check to insure that contacts of main fan relay are
opening after 20 minute cool down
Check for adequate gas supply and manual gas shut
off valve is open. Also, check flexible gas line
connection.
If not operating, refer to "Oven fan will not run".
Check for continuity, replace if necessary
Replace if necessary.
Replace if necessary
Check for 120 VAC at lead #47 (located at 6 pin
connector in raceway near the main fan motor) to
neutral. If no voltage is present, and motor is running,
replace motor.
Terminals are normally closed, opens at Thermostat
660° F (350° C). If open, push in reset button and
retest. If thermostat will not hold for maximum oven
temperature, and oven is not exceeding temperature
dial setting, check for proper location of capillary bulb
in its spring holder. If above checks okay, replace hi-
limit thermostat.
Visually check to see if motor is running. If not, check
for 120 VAC to motor at motor connector (wire #40
and #41). If voltage is not present, trace wiring back
to oven cavity High Limit. If voltage is present and
motor is not running, check for opens, shorts, or
grounds. Also, WITH POWER OFF: check for locked
rotor.
Terminals are normally closed, and open at 170° F
5° F (76.6° C 2.8°C). Check for proper operation. If it
will not reset and hold, replace thermostat.
Check for 120 VAC at motor connector wire #42 to
neutral. If voltage is not present, trace wiring back to
control box High Limit . If voltage is present, check #43
to neutral. If voltage is not present and motor is
running, replace the Burner Blower Motor.
Primary is 120 VAC with 24 VAC secondary. If 120
VAC is not present, trace wiring back to Burner Blower
Centrifugal Switch. If 120 VAC is present, check for 24
VAC at secondary of transformer. If no voltage is
present, replace transformer.
Note: The ignition control contains a safety lock-out
circuit. If a flame is not detected within 6 seconds after
the gas control valve is energized, the ignition control
will lock-out. To reset, turn the burner switch "off", wait
45 seconds and switch the burner system "on" to retry
ignition. 24 volts should be present at 24 volt terminals.
If not present, trace wiring back to burner transformer.
When 24 VAC is supplied, the control switches 120
VAC from L1 and L2 to the Hot Surface Ignitor. If 120
VAC is not present at L1 and L2, trace wiring back to
oven cavity High Limit Thermostat. If 24 VAC and 120
VAC are present and 120 VAC is not across the Hot
Surface Igniter terminals, replace the ignition control
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