6 - 1 0 l Tr o u b l e s h oo t in g
Problem
Process Protection High
Temperature – If the process
protection temperature
exceeds the process protection
high temperature setpoint, it
shuts down the dryer. Defaults
are set to 600°F {316°C} for
10 seconds.
Process Protection RTD
Integrity – If the process
protection RTD is faulty, it
shuts down the dryer.
Possible cause
The delivery RTD temperature probe is
not installed correctly.
The delivery air blower is not running.
The air lines between the dryer and hop-
per are restricted or loose.
The dryer is too far from the hopper.
The delivery air hose is not insulated.
There is a loose connection in the
wiring leading to the RTD.
The connection of the RTD plug on the
control board is loose.
The process protection RTD has failed.
The control board has failed.
Solution
Make sure the RTD temperature probe
tip is in the center of the hopper inlet
tube.
Correct the cause of the non-functioning
blower.
Straighten any crimps in the hoses.
Tighten any loose hoses.
Move the dryer closer to the hopper and
shorten the hoses.
Insulated hose is required for high dry-
ing temperatures.
Check the RTD plug connections and
make any necessary repairs.
Check the plug connection and tighten
if needed.
Replace the process protection RTD.
Replace the control board.
When supplied for central
drying applications, these
shutdown alarms are not
available.
S h u t d o w n Al a rm s
If an alarm occurs, a red dialog box is displayed on the dryer’s touch screen control. The
dryer will shut down automatically to prevent damage to the equipment or personnel. The
dialog box will indicate whether the alarm is a shut down alarm or a passive alarm.
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