Troubleshooting l 6-15
Alarms
• Shutdown (A#): The dryer has automatically shut down because it has detect-
ed a serious problem that could damage your material or dryer.
• Passive (P#): The dryer continues to operate, but warns of a problem that could
prevent correct drying of your material. If ignored, this problem could lead to a
condition that will shut down the dryer.
When supplied for central drying applications, these shutdown alarms are not available.
6
Troubleshooting
Problem
A49 - 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.
Possible cause
The process RTD temperature probe is
not installed correctly.
The process blower is not running.
The air lines between dryer and hopper
are restricted or loose.
The dryer is too far from the hopper.
The process hose is not insulated.
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
drying temperatures.
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