6-14 l Trou ble sh oo ti ng
Problem
Process Dewpoint – The dew-
point 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.
Process Filter Clogged
(Option) – The process filter
differential pressure switch is
tripped.
CFM Low (Option) - The
CFM calculated from the
process blower differential
pressure is less than the set-
point (1 CFM for 30 seconds. -
see screen 66) entered on the
operator display.
Possible cause
Defective sensor.
The hose or wiring connectors 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.
Desiccant wheel not turning.
The process air filter is clogged.
The air hoses are loose, blocked, or
kinked.
The return air filter needs to be cleaned.
Solution
Replace sensor.
Check wiring and hose connections to
the sensor, resecure if needed.
Remove the air flow restrictions, dirty
filters, etc.
Check the desiccant for contamination,
replace if needed.
See Troubleshooting section, entitled
Replacing the desiccant wheel.
Install plasticizer/volatile trap for severe
situations.
Check for worn or lose hoses.
See Wheel Rotation Failure Alarm.
Remove and clean or replace the process
air filter.
Check the process air hose for secure
connections, straighten any blocked or
kinked hose.
Clean and/or change the return air filter.
✐
Passive Alarms
If the amber Acknowledge Alarm LED is blinking, the alarm is a passive alarm.
The dryer continues to operate, but this problem could prevent correct drying of
your material. Note that when the Acknowledge Alarm button is pressed once, the
blinking amber LED becomes solid.
NOTE: Passive alarms can be configured as shutdown alarms (see the previous Shutdown Alarms
section). See page 4-26, screen 62 for instructions.
✐
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