PUREGAS, LLC
P550W2 Series Air Dryers User’s Guide
Page 89 of 99
P012226 – Rev. F
13.10 C
an’t Create a High Humidity Alarm / Shutdown
These troubleshooting steps assume that the Humidity Element is removed from
the Humidity Block during the
Testing Humidity Alarm and System Shutdown
(section 9.12 ) procedures.
Possible Cause
Check
Corrective Action
Humidity Sensor Cable
disconnected
Verify that Humidity
Sensor cable is
connected to the Control
Board
Connect Humidity
Sensor cable
Defective Humidity
Sensor
Verify that Humidity
reading fails to climb
higher than 15% or
creates sporadic
readings
Replace Humidity
Sensor (section 11.2 )
Defective Control Board Verify that Humidity
reading is over 15% for
more than 1 minute
Replace Control Board
if no alarm is created
and system does not shut
down (section 11.1 )
13.11 High Flow Rate Alarm
Possible Cause
Check
Corrective Action
Air leak in downstream
cable outside of Dryer
Verify Flow Rate
(
FLOW
) reading is not
higher than expected
(section 8.5.5.2 )
Fix downstream
problem
Air leak inside of Dryer
Test fittings and hoses
for leaks (section 9.15 )
Reconnect or replace
bad fitting / hose
High Flow Alarm set
point too low
Verify High Flow Alarm
set point
(section 8.7.1 )
Raise High Flow Alarm
set point (section 8.7.1 )
13.12 High Cabinet Temperature Alarm
Possible Cause
Check
Corrective Action
Fan Failure
Verify fan is running
(section 9.9 )
Check for loose fan
wiring (section 14.1 )
Replace defective fan
(section 11.1 )
High Ambient
Temperature
Verify temperature of
Dryer operating
location. Recommended
ambient temperature is
5°-30°C.
Lower the ambient
temperature of the
Dryer’s operating
location
Summary of Contents for P550W2 Series
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