High Humidity - Puregas P550W Series User Manual

PUREGAS, LLC

13.9 High Humidity

CAUTION!
Do not test the Humidity Sensor with an ohm meter or apply
any DC voltage. This will render the Humidity Sensor defective.
Possible Cause
Low System Pressure
Low Flow Rate
High Humidity Alarm
set point too low
Defective Humidity
Sensor
Heatless Dryer not
cycling between towers
Defective Control Board Unplug Humidity
P550W Series Air Dryers User's Guide
Check
Verify System Pressure
(section 8.9 )
Verify Flow Rate
(FLOW) reading is low
(section 8.5.5.2 )
Verify High Humidity
Alarm set point
(section 8.7.4 )
If Flow Rate is low,
allowing a higher alarm
set point (up to 10%)
will allow Dryer to run
within acceptable levels.
Perform the Testing
Humidity Alarm and
System Shutdown test
(section 9.12 )
Verify consistent
Heatless Dryer cycling
(section 9.6 )
Sensor from Control
Board (see section 11.1
for Board location)
Humidity reading should
drop to 0%
Page 88 of 99
Corrective Action
Adjust System Pressure
to 50 PSI, ± 2 PSI.
(section 8.9 )
Install the included
Precision Bleed Orifice
fitting to maintain a
constant air flow.
(section 8.2 )
Raise High Humidity
Alarm set point
(section 8.7.4 )
Over 10% not
recommended
Troubleshoot Can't
Create a High Humidity
Alarm / Shutdown
condition
(section 13.10 )
Troubleshoot
Inconsistent Heatless
Dryer Cycling condition
(section 13.13 )
If Humidity did not drop
to 0%, replace Control
Board (section 11.1 )
P011658 – Rev. P