Lincoln Impinger Conveyor Ovens 1100 Series - Manual (Page 37)

TROUBLE SHOOTING GUIDE
ELECTRIC OVENS
MODEL 1134 220/380 VAC THREE PHASE 50 HZ
MODEL 1135 240/415 VAC THREE PHASE 50 HZ
MODEL 1136 240 VAC SINGLE PHASE 50 HZ
MODEL 1150 220/380 VAC THREE PHASE 50 HZ
REFER TO PROPER SCHEMATIC FOR INDENTIFIED COMPONENTS
SYMPTON POSSIBLE CAUSE EVALUATION
Oven fan will not run Incoming Power Supply Check circuit breakers. Reset if required.
Call Power Co. if needed.
Fuse, 10 Amp, Main Fan Check, replace if necessary.
Fuseholder Check, replace if necessary.
Fuse, 1 Amp, Check, replace if necessary.
Transformer
Fuseholder Check, replace if necessary.
Transformer, Control 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.
Thermostat, High Limit, Terminals are normally closed. If open,
Oven Cavity reset the thermostat and test for propeoperation. If it
will not reset and hold, replace thermostat.
Switch, Main Check for continuity between switch
Fan terminals.
Relay, Oven Start Check for continuity at relay coil, and
visually check for pull in of contacts.
20 Minute Time Delay 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.
Main Fan Relay Check continuity to 120 VAC coil. Check
for power to relay coil (120 VAC). Check for 220/240
VAC to relay terminals.
Main Fan Motor Check for opens, shorts, or grounds.
WITH POWER OFF: Turn fan blade to
check for locked rotor.
Capacitor Check for opens, shorts, or grounds.
No main fan cool down 20 Minute Time Delay 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.
Impinger II - 1100 Series Service Manual - International 37