Blodgett MT3870, Руководство по обслуживанию и ремонту

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TROUBLESHOOTING
5-4
POSSIBLE CAUSE(S) SUGGESTED REMEDY
Symptom #2 - Oven will not reach desired temperature
Gas pressure to oven is too low.
Top air plates missing.
Faulty RTD probe.
Blower motor(s) running backward.
Controller out of calibration.
Excessive food/debris accumulation blocking
the airflow.
Contact local gas representatives.
Install air plates.
Use the chart in the Technical Appendix (page
6-10) to determine if probe is bad. Replace if
necessary.
Verify voltage to motor. If voltage is present, reĆ
place the motor or start capacitor.
Recalibrate the controller. See Technical AppenĆ
dix (page 4-5).
The inside of the oven should be cleaned to reĆ
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 reĆ
moved should then be cleaned with an appropriĆ
ate oven cleaner safe for aluminum.
Symptom #3 - Burner operates sporadically
Air pressure switch may be open.
Thermal switch tripped.
Faulty RTD probe.
Excessive food/debris accumulation blocking
the airflow.
Check convection blower (or 4 convection fans)
for proper operation.
Determine the ambient temperature in the conĆ
trol compartment. If above 140 F (60 C) check
the cooling fan operation.
Use the chart in the Technical Appendix (page
6-10) to determine if probe is bad. Replace if
necessary.
The inside of the oven should be cleaned to reĆ
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 reĆ
moved should then be cleaned with an appropriĆ
ate oven cleaner safe for aluminum.