Lincoln Impinger 1433-000-E, Service Manual

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Impinger I – Adv Digital – Gas Service Manual – International
6
TROUBLESHOOTING GUIDE
IMPINGER ADVANTAGE GAS OVENS
SERIAL NUMBER N28654 AND ABOVE
(OVENS WITH PUSH BUTTON CONTROLS)
SYMPTOM POSSIBLE CAUSE EVALUATION
Oven fan will not run Incoming power supply Check circuit breaker, reset if required. Check power
plug to be sure it is firmly in receptacle. Measure
incoming power, call power co. if required.
Fuse, 10 Amp Check, replace if necessary.
Fuse holder Check, replace if necessary.
Switch, oven power Check for line voltage supplied to switch. If no voltage is
present, trace wiring back to fuse holder. Check
continuity between switch terminals. Replace switch as
needed.
Motor, main fan Check for line voltage supplied to motor. If no voltage is
present, trace wiring back to oven power switch. Check
motor for opens, shorts or grounds.
WITH POWER OFF: Turn fan blade to check for locked
rotor.
No control box cooling Incoming power supply Check circuit breaker, reset if required. Check power
plug to be sure it is firmly in receptacle. Measure
incoming power, call power co. if required.
Fuse, 10 Amp Check, replace if necessary.
Fuse holder Check, replace if necessary.
Switch, oven power Check for line voltage supplied to switch. If no voltage
is present, trace wiring back to fuse holder. Check
continuity between switch terminals. Replace switch as
needed.
Cooling fan Check for supply voltage to the cooling fan. If no
voltage is present, trace wiring back to the fuse holder.
If voltage is present and motor does not run, check
motor for opens shorts or grounds.
WITH POWER OFF: Check for locked rotor.
No automatic control
box cooling
Incoming power supply Check circuit breaker, reset if required. Check power
plug to be sure it is firmly in receptacle. Measure
incoming power, call power co. if required.
Cooling fan thermostat Check cooling fan thermostat (thermostat closes at
120
°
F and opens at 100
°
F). With cooling fan thermostat
pre-heated, check for continuity
Control box cooling fan
continues to run
Cooling fan thermostat See “Cooling fan thermostat” (NOTE: Thermostat will
remain closed if control box temperature remains above
120
°
F.
Oven will not heat Main fan If not operating, refer to “Oven fan will not run”
S/N N31348 and
Below
Gas supply Check for adequate gas supply and be sure that the
manual gas shut off valve is open. Also check flexible
gas line connection.
Air pressure switch Check air switch terminals for supply voltage to
terminals NO2 and COM. If voltage is present on one
side only, check for air tube blockage or misalignment. If
these are okay, adjust air pressure switch or replace
switch as needed.
Oven cavity hi-limit
thermostat
Terminals are normally closed, opens at 350 ° C (660 ° F).
If open, reset and test oven for proper operation. If
thermostat will not hold for maximum temperature, and
oven is not exceeding control setting, check for proper
location of the capillary bulb in its spring holder. If above
checks are okay, replace hi-limit thermostat.
Gas pressure switch This switch is located inside the gas valve and should
close when gas pressure is present.