Wilkerson DE5 User Manual
Page 14
Instruction Manual / DE3, DE4 and DE5
Wilkerson Compact Heatless Air Dryers
MODELS DE3, DE4 AND DE5 TROUBLESHOOTING GUIDE
E
PROBLEM: NO ALARM DURING WET AIR CONDITION
POSSIBLE CAUSE
CHECK
CORRECTIVE ACTION
E1
No power to humidistat
With voltmeter, check for line
Make sure there is power to
board.
voltage at "Hot" and "Neutral"
dryer. Check wiring diagram
terminals on humidistat board.
for correct wiring. Check
Also check for line voltage at
continuity of wires.
"Common" and "Neutral".
E2
Sensor cable connection.
Check cable connections at
Reconnect
sensor and at humidistat board.
E3
Bad sensor.
Remove air pressure from dryer.
Replace sensor.
With sensor cable connected and
power on, unscrew brass hex nut
at bottom of sensor housing. Blow
gently on sensor. The moist air
from your breath should cause
the alarm to sound.
E4
Bad humidistat board.
Press red "Push to Test" button on
Replace humidistat board.
humidistat board. Alarm should
sound.