OPERATING PROCEDURE | Fan and Heater |
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Normal Operating Displays With Heater Not Running
The main display shows the plenum temperature. If the dryer has not been running, the display should show outside temperature. The control is preset at the factory to display temperature in centigrade or fahrenheit.
"AIRFLOW" or "NO AIRFLOW" is displayed if air is flowing or not flowing. "RX TX" (receive, transmit) is displayed if multiple heaters are con- nected.
All safeties or high limits are continuously checked during the off mode. A limit switch open,
or any other error condition will cause the display to show the limit or error condition.
When drying is not occurring, and the limit or error condition is corrected, the display returns to its normal output. This is not the case with an error or limit condition during the drying operation. This causes the display to lock up in the error display mode. This is to keep the display locked up with the condition illuminated. ( see section on "Running the Dryer" for mode explanation on page 17).
The heater display with fan on (airflow).
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