SECTION 3 PRODUCT USER MANUAL
133
The unit will not run or
cycles off and on.
Excessive compressed air
inlet temperature.
Design conditions and correc-
tion factors are described in
this manual.
Be sure that dryer is working
in ambient temperatures
below design conditions.
The dryer is designed for working
into calculated design conditions.
Should the conditions be
exceeded, the dryer will be over-
flowed, dew point will go up and
protecting devices may trip.
Excessive ambient tem-
perature
Designed conditions and cor-
rection factors are described
in dryer . Be sure that dryer is
working lower than design
conditions.
A high ambient temperature may
cause the refrigerant system to
operate at higher than normal
pressures. Results will be a
higher than normal evaporator
temperature.
Important: there should be ade-
quate air circulation around the
dryer, and proper ventilation in
the equipment room should guar-
antee a low enough ambient tem-
perature.
Clogged condenser fins Clear fins of all obstructions. The clogged fins in the con-
denser will restrict the air pas-
sage and reduce the refrigeration
capacity, causing high tempera-
ture in the evaporator.
Fins should be periodically
checked and cleaned.
Shortage of refrigerant Fix the leak and add a charge
of refrigerant.
Loss of refrigerant will cause
improper functioning. 3-phase
dryers are equipped with a tem-
perature switch which maintains
the amount of refrigerant to main-
tain proper cooling of the com-
pressor.
A shortage of refrigerant may
cause suction line to become
very hot, causing the temperature
switch to trip.
A qualified refrigeration specialist
should perform the necessary
repairs, or the factory should be
contacted if the unit is in war-
ranty.
Err sign occurs on
digital temperature
control device
The dew point is too low or
too high.
Check refrigerant gas and
make sure that the working
conditions are within the cor-
rect range.
If there is not enough refrigerant-
gas or if the working temperature-
and inlet temperatures are very
high, the dew point will increase.
Problem Possible Cause Repair Comments
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