User guide

6-14 l Troubleshooting
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.
Problem
A58 & P34 - Dewpoint
Deviation High (Option) -
Displayed when the actual
dewpoint goes above the set-
point by a specified amount of
time and degrees. Defaults are
set for 5°F {3°C} for 30
seconds.
A 59 & P35 - Dewpoint
Deviation Low (Option) -
Displayed when the actual
dewpoint goes below the set-
point by a specified amount of
time and degrees. Defaults are
set for 5°F {3°C} for 30
seconds.
Possible cause
Desiccant wheel not turning.
The hose or wiring connections to the
sensor block are loose or have fallen off.
Poor regeneration air flow.
The desiccant wheel may be contaminat-
ed.
Leaks in the process air stream.
The dewpoint can not control to the
desired setpoint.
The dewpoint sensor has failed.
Solution
See A55 & P31
Check wiring and hose connections to
the sensor, resecure if needed.
Remove the air flow restrictions, dirty
filters, etc.
Install plasticizer/volatile trap for severe
situations.
Replace the desiccant wheel.
See
Troubleshooting section, entitled
Replacing the desiccant wheel assembly.
Check for worn or loose hoses.
Material and/or ambient condition may
be too dry to increase the actual dew-
point. Please wait several hours to
determine if the setpoint can be reached.
Increase the dewpoint low deviation
value.
Replace the dewpoint sensor.