GSI Group PNEG-377, Service Manual

Page: 38 / 98

38
Fan and Heater
OPERATING PROCEDURE
Normal Operating Displays With Heater Not Running
The heater display with fan on (airflow).
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 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.