PUREGAS, LLC
P4200PM / P5000PM Remote Air Dryer User’s Guide
Page 69 of 79
P012649 – Rev B
13.7 Can’t Create a High Humidity Alarm / Shutdown
These troubleshooting steps assume that the Humidity Sensor is removed from the
Humidity Block during the
Testing Humidity Alarm and System Shutdown
(section 9.13) procedures.
Possible Cause
Check
Corrective Action
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 5 minutes
Replace Control Board
if no alarm is created
and system does not
shut down (section
11.2)
13.8 Inconsistent Heatless Dryer Cycling
Possible Cause
Check
Corrective Action
Defective Solenoid
Valve
Measure voltage going
to the Heatless Dryer
Solenoid Valves
(section 9.8)
If 53 VDC
IS
present,
replace Solenoid
Valves included in the
Maintenance Kit
(section 11.4)
Defective Cycle Timer
Measure voltage going
to the Heatless Dryer
Solenoid Valves
(section 9.8)
If 53 VDC
IS NOT
present, replace the
Cycle Timer
(section 11.4)
