User guide

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
A28 & P9 - Process dew-
point – The dewpoint has not
fallen below the setpoint. If
the dewpoint goes below the
setpoint for 180 seconds the
alarm should go away.
NOTE: The alarm is not active
for the first 5 minutes.
A29 & P10 - Process Filter
Clogged (Option) – The
process filter differential pres-
sure switch is tripped.
Possible cause
Defective sensor.
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.
Desiccant wheel not turning.
Leaks in the process air stream.
The process air filter is clogged.
Solution
Replace the sensor.
Check wiring and hose connections to
the sensor, re-secure if needed.
Remove any air flow restrictions, dirty
filters, kinked hoses, etc.
Check the desiccant for contamination,
replace if needed.
Replace the desiccant wheel. See
Troubleshooting section, entitled
Replacing the desiccant wheel.
Install plasticizer/volatile trap for severe
situations.
See A55 & P31
Check for worn or lose hoses. Replace
as needed.
Remove and clean or replace the process
air filter.
6
Troubleshooting
Troubleshooting l 6-11