Repair manual

TROUBLESHOOTING
5 --- 4
POSSIBLE CAUSE(S) SUGGESTED REMEDY
Symptom #2 --- Oven will not reach desired temperature
D Gas pressure to oven is too low.
D Top air plates missing.
D Faulty RTD probe.
D Blower motor(s) running backw ard.
D Controller out of calibration.
D Excessive food/debris accumulation blocking
the airflow.
D Contact local gas representatives.
D Install air plates.
D Use the chart in the Technical Appendix (page
NO TAG) to determine if probe is bad. Replace if
necessary.
D V erify voltage to motor. If voltage is present, re-
placethemotororstartcapacitor.
D Recalibrate the controller. See Calibration and
A d j u s t m e n t ( p a g e 3 --- 5 ) .
D The inside of the oven should be cleaned to re-
move any materials that could have dropped off
the conveyor belt and possibly blocked some of
the air flow holes. This would include the removal
of the conveyor belt, conveyor belt supports, and
the nozzles. The oven interior and all parts re-
moved should then be cleaned with an appropri-
ate oven cleaner safe for aluminum.
Symptom #3 --- Burner operates sporadically
D Air pressure switch may be open. General export
and CE approved ovens only.
D Thermal s witch tripped.
D Faulty RTD probe.
D Excessive food/debris accumulation blocking
the airflow.
D Check convection blower (or 2 convection fans)
forproperoperation.
D Determine the ambient temperature in the con-
trol compartment. If above 140_F(60_C) check
the cooling fan operation.
D Use the chart in the Technical Appendix (page
NO TAG) to determine if probe is bad. Replace if
necessary.
D The inside of the oven should be cleaned to re-
move any materials that could have dropped off
the conveyor belt and possibly blocked some of
the air flow holes. This would include the removal
of the conveyor belt, conveyor belt supports, and
the nozzles. The oven interior and all parts re-
moved should then be cleaned with an appropri-
ate oven cleaner safe for aluminum.