PUREGAS, LLC
P4200W2 Series Air Dryer User’s Guide
Page 102 of 113
P012308 - Rev. E
13.10 High Humidity
Possible Cause
Check
Corrective Action
Low System Pressure
Verify System Pressure
(section 8.14 )
Adjust System Pressure
(section 8.14 )
Low Flow Rate
Verify Flow Rate
(
FLOW
) reading is low
(section 8.4.5.2 )
Increase flow by
creating an artificial leak
outside of the air dryer
High Humidity Alarm
threshold too low
Verify High Humidity
threshold
(section 8.8.3 )
If Flow Rate is low,
allowing a higher
Humidity alarm
threshold (up to 10%)
will allow dryer to run
within acceptable levels.
Raise High Humidity
threshold
(section 8.8.3 )
Over 10% not
recommended
Heatless Dryer not
cycling between towers
Verify consistent
Heatless Dryer cycling
(section 9.7 )
Troubleshoot
Inconsistent Heatless
Dryer Cycling
condition
(section 13.13 )
Plugged or obstructed
Outlet Purge
Test fittings and hoses to
Outlet Purge
Remove obstruction
Defective Humitter
Perform the Testing
Humidity Alarm and
System Shutdown test
(section 9.14 )
Troubleshoot
Can’t
Create a High Humidity
Alarm / Shutdown
condition
(section 13.11 )
Defective Control Board Unplug Humitter from
Control Board (see
section 11.1 for Control
Board location)
Humidity reading should
display
**%
If Humidity reading
does not display
**%
,
replace Control Board
(section 11.1 )
CAUTION!
Do not test the Humidity Sensor with an ohm meter or apply
any DC voltage.
This will render the Humidity Sensor defective.
Summary of Contents for P4200W2
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