Aircel DHT-40 - 7.6 VF & DHT Series Troubleshooting

VF, DHT, AES Series Manual |
Refrigerated Air Dryer User Manual
25
7.6 VF & DHT Series Troubleshooting Guide
Problem Probable Cause Remedy
Water downstream
of dryer system or
no discharge from
separator/lter
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 specications
Inlet compressed air CFM ow rate
exceeds dryer capacity
Check inlet air cfm and adjust as required to meet
specications
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/o
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 specications
Low refrigerant, possible leak in air-to-
refrigerant side of heat exchanger
Repair or replace heat exchanger and recharge according
to specications
Refrigeration compressor is overheated
Turn o 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 specications.
Contact Technical Support.