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.
Troubleshooting l 6-21
6
Troubleshooting
Problem
P34 - Dewpoint Deviation
High – Displayed when the
actual dewpoint goes above
the setpoint by a specified
amount of time and degrees.
Defaults are set for 5°F {3°C}
for 30 seconds.
P35 - Dewpoint Deviation
Low – Displayed when the
actual dewpoint goes below
the setpoint by a specified
amount of time and degrees.
Defaults are set for 5°F {3°C}
for 30 seconds.
Possible cause
The hose or wiring connections to the
sensor block are loose or have fallen
off.
Poor regeneration air flow.
Desiccant wheel not turning.
The desiccant wheel may be
contaminated.
Leaks in the process air stream.
The dewpoint can not control to the
desired setpoint.
The dewpoint sensor has failed.
Solution
Check wiring and hose connections
to the sensor, re-secure if needed.
Remove the air flow restrictions,
dirty filters, etc.
See A55 & P31
Check the desiccant for contamina-
tion, replace if needed.
Replace the desiccant wheel. See
Troubleshooting section, entitled
Replacing the desiccant wheel.
Install plasticizer/volatile trap for
severe situations.
Check for worn or loose hoses.
Material and/or ambient condition
may be too dry to increase the actual
dewpoint. Please wait several hours
to determine if the setpoint can be
reached. Increase the dewpoint low
deviation value.
Replace the dewpoint sensor.
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