Lincoln Impinger Conveyor Ovens 1100 Series - Manual (Page 25)

TROUBLE SHOOTING GUIDE
GAS OVENS
MODELS 1152 - 1153 - 1154 - 1155 - 1156 - 1157 - 1158
REFER TO PROPER SCHEMATIC FOR IDENTIFIED COMPONENTS
SYMPTOM POSSIBLE CAUSE EVALUATION
Oven fan will not run Incoming Power Supply Check circuit breakers, reset if
required, call power company if needed.
Main Fan Switch Check continuity between switch
terminals.
Control Box High Limit Terminals are normally closed, and
Thermostat open at 170°F ± 5F (76.6°C ± 2.8°C).
NOTE: Discontinued at Check for over heating and reset
S/N 2011821 thermostat. Test for proper
operation. If it will not reset and hold, re-
place thermostat.
Fuse, 1 Amp Check, replace if necessary.
Fuseholder Check, replace if necessary.
Transformer,Step Down 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.
Oven Start Relay Check for 120 VAC to relay coil. If
voltage is not present, trace wiring
back to power source. If voltage is
present, check to insure contact
is closing.
20 Minute Time Delay Check for 120 VAC at terminal #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
cool down relay contact is closed,
replace Time Delay Relay.
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.
Fuse, 10 Amp Check, replace if necessary.
Fuseholder Check, replace if necessary.
Motor Capacitor Check for opens, shorts, or grounds.
Main Fan Motor Check for supply voltage to main fan
motor. If voltage is not present, trace
wiring back to main fan relay. Check for
opens, shorts, or grounds.
WITH POWER OFF: turn fan blade to
check for locked rotor.
Impinger II - 1100 Series Service Manual - International 25