Tr o u b l es h oo t in g l 6- 1 7
Problem
Delivery Air Dewpoint – The
dewpoint has not fallen below
the setpoint. If the dewpoint
goes below the setpoint for
600 seconds the alarm should
go away.
NOTE: The alarm is not
active for the first 5 min-
utes.
Possible cause
Defective dewpoint 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.
Power Purge blower not running.
Solution
Replace the 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. Install plasticizer /
volatile trap for severe situations.
Replace the desiccant wheel.
See
Troubleshooting section entitled,
Replacing the desiccant wheel
.
See Troubleshooting section entitled,
Passive alarms, Wheel rotation alarm.
Check for worn or loose hoses.
Check fuses, wiring or replace blower.
✐
6
Tr ou bleshooti ng
Pa ss i v e Ala r ms
If an alarm occurs, a red dialog box is displayed on the dryer’s touch screen control. The
dryer continues to operate, but this problem could prevent correct drying of your material.
The dialog box will indicate whether the alarm is a shut down alarm or a passive alarm.
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