Trouble Shooting Guide, Electric Ovens 1134, 1135, 1136, 1150 - Lincoln Impinger Conveyor Ovens 1100 Series Service Manual

MODEL 1134
MODEL 1135
MODEL 1136
MODEL 1150
REFER TO PROPER SCHEMATIC FOR INDENTIFIED COMPONENTS
SYMPTON
Oven fan will not run
No main fan cool down
Impinger II - 1100 Series Service Manual - International
TROUBLE SHOOTING GUIDE
ELECTRIC OVENS
220/380 VAC
240/415 VAC
240 VAC
220/380 VAC
POSSIBLE CAUSE
Incoming Power Supply
Fuse, 10 Amp, Main Fan
Fuseholder
Fuse, 1 Amp,
Transformer
Fuseholder
Transformer, Control
Thermostat, High Limit,
Oven Cavity
Switch, Main
Fan
Relay, Oven Start
20 Minute Time Delay
Main Fan Relay
Main Fan Motor
Capacitor
20 Minute Time Delay
THREE PHASE
THREE PHASE
SINGLE PHASE
THREE PHASE
EVALUATION
Check circuit breakers. Reset if required.
Call Power Co. if needed.
Check, replace if necessary.
Check, replace if necessary.
Check, replace if necessary.
Check, replace if necessary.
120 VAC ± 10% should be present at secondary of
transformer. If proper voltage is not present, check
transformer primary for proper input. Replace as
needed.
Terminals are normally closed. If open,
reset the thermostat and test for propeoperation. If it
will not reset and hold, replace thermostat.
Check for continuity between switch
terminals.
Check for continuity at relay coil, and
visually check for pull in of contacts.
Check for 120 VAC at terminals #1 to
neutral on 20 minute Time Delay Relay.
If no voltage is present, trace wiring
back to power source. If voltage is
present at terminal #1, check for 120
VAC at terminal #2 to neutral. If no voltage ispresent,
and oven start relay is closed, replace Time Delay.
Check continuity to 120 VAC coil. Check
for power to relay coil (120 VAC). Check for 220/240
VAC to 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 120 VAC at terminal #2 to
neutral while oven is "on". Turn off the main fan
switch, 120 VAC should continue to be present for 20
minutes. If voltage is not present for approx. 20
minutes, replace the timer.
50 HZ
50 HZ
50 HZ
50 HZ
37