Dryer Manual

AIR DRYER INSTRUCTION MANUAL
16
TROUBLESHOOTING
Problem Possible Cause Re
p
air Comments
Water in system Excessive moisture in
compressed air
Check the separator
and drain system and
compressor after cooler
ahead of the dryer.
In some systems moisture
accumulates in the line ahead of
the dryer. If this moisture is
pumped into the dryer
intermittently, the water removal
capacity may not be sufficient.
It’s recommended that air from
compressor is piped to air tank
first. If plumbed directly to the
dryer, install a water separator in
the line before the dryer.
Excessive
compressed air inlet
temperature.
Be sure that dryer is
working lower than
design conditions
The dryer works according to
calculated design conditions. If
the conditions are exceeded, the
dryer will be overworked, dew
point goes up and protecting
devices may switch off.
Clogged condenser fins
Clear fins of all
obstructions
Clogged condenser fins restricts
air flow and reduces refrigerant
capacity, and increased
refrigerant temperature, causing
water downstream. Check &
clean fins periodically.
Shortage of refrigerant
Fix the leak and add a
charge of refrigerant.
Loss of refrigerant causes
improper functioning. Have a
qualified, refrigeration specialist
make the necessary repairs, or
contact factory if unit is in
warranty.
Refrigeration system
is not functioning
Check to be certain
refrigerant compressor is
running
Check compressor on-light and
check compressor is running.
The fan may be operating but not
the compressor. Several factors
causes a compressor not to run.
Have a qualified refrigeration
technician to check all
refrigerant and electrical controls
Excessive pressure dew
point
Readjust refrigerant
evaporating pressure
A label on the unit identifies the
pressure adjustment valve. Some
models that valve is not adjustable.
On adjustable models, turn the
adjustment screw counter-
clockwise to decrease the
refrigerant pressure and lower
the dew point. Adjust valves in
1/4 turn increments to allow 15
minutes for pressure
stabilization with air flowing. Be
sure that gauge indicates that
pressures stay in green zone.