Lincoln Impinger Conveyor Ovens 1100 Series - Manual (Page 41)

TROUBLESHOOTING GUIDE ELECTRIC OVEN
MODEL 1151 200 VAC THREE PHASE 60 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.
Fuses,10 Amp,Main Fan Check, replace if necessary.
Fuseholder Check, replace if necessary.
Fuses, 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 proper
operation. 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 is
present, and Main Fan Switch is closed, replace
Time Delay.
Main Fan Relay Check for 120 VAC to coil of the Relay.
If no voltage is present, trace wiring
back to 20 minute Time Delay Relay. If
voltage is present, check to insure
contacts are closing.
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
approximately 20 minutes, replace the
timer.
Impinger II - 1100 Series Service Manual - International 41