| VF, DHT, AES Series Manual
Refrigerated Air Dryer User Manual
30
Problem
Probable Cause
Remedy
Water downstream
of dryer system or
no discharge from
separator/filter
Failed or short circuited timer on drain
Replace timer drain
Failed drain solenoid
Replace timer drain
Bulk liquid entering the dryer from
upstream
Check drains on aftercooler or air compressor
Inlet compressed air temperature to
dryer exceeds dryer capacity air
Check inlet air temperature and adjust as required to
meet specifications
Inlet compressed air CFM flow rate
exceeds dryer capacity
Check inlet air cfm and adjust as required to meet
specifications
Leak in the air-to-air heat exchanger
Replace heat exchanger
Water downstream
and dryer system not
working properly
Refrigeration compressor stopped due
to plugged or dirty condenser coil (high
pressure)
Clean condensing coil and ensure adequate ventilation of
unit
Refrigeration compressor cycles on/off
and cannot maintain suction pressure
Check condensing coil for dirt or debris that could
prohibit adequate ventilation of the refrigeration circuit.
If it is clean, check refrigerant pressure gauge(s) to
determine if the unit is low on refrigerant.
Low refrigerant
Check for leak in refrigeration circuit; repair and recharge
according to specifications
Low refrigerant, possible leak in air-to-
refrigerant side of heat exchanger
Repair or replace heat exchanger and recharge according
to specifications
Refrigeration compressor is overheated
Turn off dryer and wait 20-40 minutes, restart dryer.
Refrigerant control settings may need adjustment,
contact Technical Support
Refrigeration compressor has burned
out or windings have gone to ground
Replace compressor; check for leak in refrigeration
circuit, repair and recharge according to specifications.
Contact Technical Support.
7.7 AES Series Troubleshooting Guide
Summary of Contents for AES Series
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