Lincoln Impinger Conveyor Ovens 1100 Series - Manual (Page 34)

TROUBLE SHOOTING GUIDE
ELECTRIC OVENS
MODEL 1104 380/220 VAC THREE PHASE 50 HZ
MODEL 1105 415/240 VAC THREE PHASE 50 HZ
MODEL 1106 240 VAC SINGLE PHASE 50 HZ
REFER TO PROPER SCHEMATIC FOR IDENTIFIED 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, 1 Amp, Check, replace if necessary.
Fuseholder Check, replace if necessary.
Switch, Main Fan Check for continuity between switch terminals.
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.
Main Fan Relay Check continuity to 120 VAC coil. Check
for power to relay coil (120 VAC). Check for 220/240
VAC to the relay terminals. Check, replace
if necessary.
Fuse 10 A. Main Fan Check, replace if necessary.
Fuse Holder Check, replace if necessary.
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 control box cooling 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
on fan motor.
No main fan cool down Cool Down Thermostat Check cool down thermostat (thermostat
closes at 160°F and opens at 140°F).
Check for power (220/240 VAC) at cool down thermo
stat. With cool down thermostat preheated, check for
continuity. If switch is open, replace.
Oven will not heat Main Fan Motor Check for main fan operation. If it is not
operating, refer to “Oven fan will not run”.
High Limit Thermostat, Terminals are normally closed (open at
190°F). If open, reset the thermostat and
test for proper operation. If it will not reset and hold,
then replace.
Impinger II - 1100 Series Service Manual - International 34