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Troubleshooting – Despatch RFD1-42-2E with Protocol Plus User Manual

Page 65

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TROUBLESHOOTING


Equipment which operates for long periods of time may develop problems. Below are
possible problems and suggested solutions. If you have a problem not listed and do not
know what to do, contact Despatch Industries at our toll free Help Line 800-473-7373.

Difficulty

Probable Cause

Suggested Remedy

Failure to heat

No power

Burned out heater

Protocol™ malfunction

Loose wire connections


Purge timer not timed out or
failed

Heater relay failure

Airflow switch not closed



Door switch failure

Check power source and/or oven and wall fuses.

Replace heater (see warranty.)

Replace controller.

Disconnect power and check connections behind
control panel.

Wait 3 minutes. If still not heating, replace purge
timer.

Replace circuit board.

Check exhaust system for proper operation and
ventilation. If airflow switch still does not close,
replace switch.

Replace door switch.

Slow heat up

Improperly loaded

Low line voltage


Heating element(s) are
burned out

240 volt oven is connected to
a 208V line (RFD1-42 only)

Fan motor failure

Reduce load or redistribute load in chamber.

Supply sufficient power and proper connections.
Check for circuit overload.

Replace heater (see warranty statement.)

Raise line voltage to a 240 volt line or modify oven
for 208V operation (consult factory).

Replace fan motor.

Frequent heater
element burnout

Harmful fumes generated by
load

Spillage or splattering of
material on heater elements

Overheating oven

Increase vent opening or discontinue process.


Disconnect power and clean oven chamber and
elements.

Check the Hi-limit.