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Impinger II – Advantage Digital Express Service Manual - Domestic
17
Oven fan relay Check for 120VAC to relay coil, if no voltage is
present, trace wiring back to 20 minute time delay.
If voltage is present, be sure that relay contacts
stay closes during the 20 minute cool down.
Replace relay as needed.
Main fan runs after
20 minute cool down
Oven start relay Contacts should open when main power switch is
turned off. Replace relay as needed.
20 Minute time delay 120VAC at terminal #2 should discontinue approx.
20 minutes after main power is switched off. If the
oven start relay contacts are open, and the
voltage continues at terminal #2 of the 20 minute
timer, for more than 20 minutes, replace the 20
minute time delay.
Oven fan relay Check to insure that the relay contacts are
opening after the relay coil is de-energized.
Replace relay as needed.
20 Minute time delay NOTE: On/ off operation of the main power switch
will set the timer to 20 minutes. If the timer is
accidentally reset, turn off the main circuit breaker
for 15 seconds to cancel.
No control box cooling Incoming power Check circuit breakers, reset if required. Check
power plug to be sure it is firmly in receptacle.
Measure incoming power, call power co. if
needed.
Switch, main power Check continuity between switch terminals.
Replace switch as needed.
Cooling fan Check for supply voltage at cooling fan. If no
voltage is present, trace wiring back to power
switch. If voltage is present, and motor does not
run, check for opens, shorts or grounds.
WITH POWER OFF: Check for locked rotor.
No automatic control box
cooling
Incoming power supply Check circuit breakers, reset if required. Check
power plug to be sure it is firmly in receptacle.
Measure incoming power, call power co. if
needed.
Cooling fan thermostat Check the cooling fan thermostat. (Thermostat
closes at 120°F and opens at 100°F). With the
cooling fan thermostat pre-heated, check for
continuity. If switch is open, replace cooling fan
thermostat.
Cooling fan Check for supply voltage at cooling fan. If no
voltage is present, trace wiring back to cooling fan
thermostat. If voltage is present, and motor does
not run, check for opens, shorts or grounds.
WITH POWER OFF: Check for locked rotor.
Oven will not heat Main fan motor Check for main fan operation. If it is not operating,
refer to “Oven fan will not run”.
Air pressure switch This normally open switch should close when the
main fan is activated. Refer to the “Removal and
installation” section for proper adjustment.
Replace as needed.
Control transformer Check for 120VAC supply to the primary of the
control transformer. If no voltage is present, trace
wiring back to the main power switch. If voltage is
present, check for 24VAC at the transformer
secondary. If there is primary voltage, but no
secondary voltage, replace the control
transformer.
Oven control Check for 24VAC supply to control. If no voltage is
present, trace wiring back to control transformer. If