Troubleshooting Guide 1100 Thru 1103 - Lincoln 1100 Series Service Manual

REFER TO PROPER SCHEMATIC FOR IDENTIFIED COMPONENTS
SYMPTON
Oven fan will not run
No control box cooling
No main fan cool down
Oven will not heat
High Limit Thermostat, Oven
Cavity
Switch, Heat
Air Pressure Switch
Fuse, 3 Amp
Fuseholder
Temperature Control
Thermocouple Probe
22

TROUBLESHOOTING GUIDE 1100 THRU 1103

ELECTRIC OVENS
MODEL 1100 / 120/208 VAC / SINGLE PHASE / 60 HZ
MODEL 1101 / 120/240 VAC / SINGLE PHASE / 60 HZ
MODEL 1102 / 120/208 VAC / THREE PHASE / 60 HZ
MODEL 1103 / 120/240 VAC / THREE PHASE / 60 HZ
POSSIBLE CAUSE
Incoming Power Supply
Fuses, 10 Amp,
Fuseholder
Switch, Main Fan
Main Fan Relay
Main Fan Motor
Capacitor
Cool Down Thermostat
Main Fan Motor
EVALUATION
Check circuit breakers. Reset if required. Call Power Co. if
needed.
Check, replace if necessary
Check, replace if necessary
Check for continuity between switch terminals.
Check continuity of 120 VAC coil. Check for power to
relay coil (120 VAC). Check for 208/240 VAC to the relay
terminals
Check for opens, shorts, or grounds. WITH POWER
OFF: Turn fan blade to check for locked rotor
Check for opens, shorts, or grounds.
Check for main fan operation. If not operating, refer to
"Oven fan will not run". Cooling Fan Motor 120 VAC
should be present at the fan motor. If voltage is present,
check for opens or shorts. .WITH POWER OFF: Check
for locked rotor of the fan motor.
Check cool down thermostat (thermostat closes at 160° F
and opens at 140° F). Check for power (120 VAC) at cool
down thermostat. With cool down thermostat preheated,
check for continuity. If switch is open, replace.
Check for main fan operation. If it is not operating, refer
to "Oven fan will not run".
Terminals are normally closed. If open, reset the
thermostat and test for proper operation. If it will not
reset and hold, then replace.
With switch on, check for 120 VAC on both terminals to
neutral. Replace if defective
This normally open switch should close when the main
fan is activated. If adjustment is necessary (Refer to
Section D). Replace if defective.
Check, replace if necessary.
Check, replace if necessary
Check for 120 VAC supply at terminal #11 to neutral on
temperature control. If no voltage is present, trace wiring
back to 3 amp fuse. Turn the temperature adjustment
knob to maximum temperature position and check for
120 VAC at the load terminal (#9) and neutral. If 120
VAC is present and unit is not heating, refer to "Mercury
Contactor" for next check. If 120 VAC is not present,
proceed.
WITH POWER ON AND THERMOCOUPLE LEADS
ATTACHED TO THE TEMPERATURE CONTROL
BOARD: measure D. C. millivolt output of these leads.
Refer to thermocouple chart on page 36 for proper
readings. If these readings are not achieved, replace
thermocouple.
Impinger II –1100 Series Service Manual - Domestic