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Impinger I – 1400 Series Advantage Service Manual - Dom & Int’l
18
TROUBLESHOOTING GUIDE
ELECTRIC OVENS
IMPINGER ADVANTAGE SERIES
SYMPTOM POSSIBLE CAUSE EVALUATION
Incoming Power Supply Check breakers/Reset if required. Call Power Co. if
needed.
Oven Fan Fuse Check and/or Replace
Fuse Holder Check and/or Replace
Fan Switch
1454-1455
Check continuity between switch terminals.
For these oven models, there is a control circuit step-
down transformer. This transformer steps down
supply voltage to 120 VAC. If main fan will not run, the
secondary of this transformer must be checked for
120 VAC output. Check specific oven model
schematic for circuit location.
Main Relay Check continuity to 120 VAC coil. Check for power to
the relay coil,(120 VAC). Check for 120/208/220/240
VAC to relay terminals. Visually check for contact pull-
in.
Fan Motor Check for opens, shorts, or ground. WITH POWER
OFF: Turn Fan Blade to check for locked rotor.
Oven fan will not run
Capacitor Check for opens, shorts, or grounds.
Main Fan Relay Check for power to main fan relay. Visually check for
contact pull-in.
No control box
cooling
Axial Cooling Fan WITH POWER OFF: turn fan blade to check for
locked rotor. Check for power to cooling fan. If voltage
is present at the fan motor and the fan does not run,
replace fan assembly.
Incoming Power Supply Check circuit breakers, reset if required, call Power
Company if needed.
No automatic control
box cooling
Cooling Fan Thermostat Thermostat is normally open and closes at 120°F ± 3
(48.9°C ± 7°), and opens at 100°F ± 3°F (37.8°C ±
1.7°C).
Main Oven Fan Check if main oven fan is operating. If not, refer to
"Oven fan will not run". Page 18.
Centrifugal Switch (Main Fan)
Model 1452-1453
Check for 120 VAC on both sides of switch. If voltage
is present on one side only and motor is running,
replace motor.
Oven will not heat
Air Pressure Switch
(1454-1455)
This normally open switch should close when the
main fan is activated. If adjustment is necessary
(Refer to page 28). Check tube for blockage. Replace
if defective.
Hi Limit Thermostat (Oven
Cavity)
Terminals are normally closed. If open, reset and test
oven for proper operation. If thermostat will not hold
for maximum oven temperature, and oven is not
exceeding temperature dial setting, replace
thermostat.
Control Box High Limit
Thermostat
Terminals are normally closed, but open at 130°F ±
5°F (53.9°C ± 2.8°C). Check for over heating and
reset thermostat. Test for proper operation. If it will not
reset and hold, then replace.