| VF, DHT, AES Series Manual
Refrigerated Air Dryer User Manual
32
Problem Probable Cause Remedy
Low air pressure
downstream due to
continuous air ow
through the moisture
drain line
Failed or short circuited timer on drain Replace timer drain
Failed drain solenoid Replace timer drain
Solenoid valve stuck open
If power is o and the air stops leaking, replace the
timer drain. If power is o and air continues leaking,
clean the timer drain.
Noise or vibration
coming from
refrigeration air dryer
system
Shipping damage has caused
compressor mounting to loosen
Check all mounting bolts on compressor and tighten
Cabinet panels or support beams
loosened during shipping
Check all screws and bolts on dryer system and tighten
Loose mounting bolts, bent fan blade, or
worn bearings on condenser fan motor
Tighten bolts, straighten or replace fan blade, or
replace fan motor
Noise coming from refrigeration
compressor due to liquid refrigerant
in compressor - caused by shipping or
moving of dryer
Let dryer system sit for six hours to allow refrigerant
to settle out of compressor and to allow crankcase
heater to warm compressor
Timer drain
stuck open
Failed or dirty timer drain
If power is o and the air stops leaking, replace the
timer drain. If power is o and air continues leaking,
clean the timer drain.
7.7 AES Series Troubleshooting Guide
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