PUREGAS, LLC
P4200W2 Series Air Dryer User’s Guide
Page 103 of 113
P012308 - Rev. E
13.11 Can’t Create a High Humidity Alarm / Shutdown
These troubleshooting steps assume that the Humitter is removed from the
Humidity Block during the
Testing Humidity Alarm and System Shutdown
(section 9.14 ) procedures.
Possible Cause
Check
Corrective Action
Humitter Cable
disconnected
Verify that Humitter
cable is connected to the
Control Board
Connect Humitter cable
Defective Humitter
Verify that Humidity
reading fails to climb
higher than 15% or
creates sporadic
readings
Replace Humitter
(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 )
13.12 High Cabinet Temperature Alarm
Possible Cause
Check
Corrective Action
Fan Failure
Verify fan is running
(section 9.10 )
Check for loose fan
wiring (section 14.1 )
Replace defective fan
(section 11.3 )
Defective Control Board Unplug Temperature
Probe from Control
Board (see section 11.1
for Control Board
location)
Cabinet Temperature
reading should drop to
0°C.
If Cabinet Temperature
did not drop to 0°C,
replace Control Board
(section 11.1 )
High Ambient
Temperature
Verify temperature of
dryer operating location.
Recommended ambient
temperature is 5°-30°C.
Lower ambient
temperature of dryer
operating location
