Keltech KRAD M Series, Инструкция по эксплуатации, Страница: 62 / 62

Page 62
Problem Possible Cause Repair Comments
The unit will not
run or cycles off
and on. Excessive ambient
temperature 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 adequate air
circulation around the dryer, and proper ventilation in
the equipment room should guarantee a low enough
ambient temperature.
Clogged condenser fins Clear fins of all obstructions. The clogged fins in the condenser will restrict the air
passage and reduce the refrigeration capacity,
causing high temperature 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.
Dryers are equipped with a temperature switch which
maintains the amount of refrigerant to maintain
proper cooling of the compressor.
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.
Error 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 correct range. If there is not enough refrigerant gas or if the working
temperature and inlet temperatures are very high,
the dew point will increase.
Drain Failure Back pressure or
reduction of drain port. Back First of all replace the
drain / drains. Open drain to
atmosphere (no back pressure)
- if hose / pipe is used to carry
the drain somewhere else;
keep or enlarge the diameter. Max drain hose length after the dryer
must not exceed 10 meters.
Max drain hose height from the dryer
must not exceed 3 meters.
The drain port size should not be reduced.
There should not be any fitting that may cause
pressure drop such as valves, elbow, tees, etc.
on the drain connection.
Drain should be at atmospheric pressure at all times.
Any back pressure will result in failure
and malfunction.
Warranty Statement for Air Dryers
when used under the conditions recommended by the manufacturer, Keltec Air Dryers are warranted
tobe free from defects in material and workmanship for a period of 24 months from startup date, whi-
ch should not exceed 30 days from the factory ship date, provided that Keltec is furnished the startup form.
The heat exchanger will be warranted for 5 years. This warranty is limited to the replacement of the heat
exchangers, FOB Factory, and subject to the same restrictions as outlined below concerning misuse, abuse
or accident.
All electrical components such as fan motor, compressors and electronical parts such as timer drain etc. in
the product have a limited warranty for 3 months. It is always possible to send the failed electrical and
electronical parts back to Keltec for detailed inspection and a report. If the inspection result of Keltec
or the manufacturer of the equipment shows that the failure is due to a production fault, then the parts will
be considered under warranty.
This warranty will apply to equipment installed, operated and maintained in accordance with the procedures
and recommendations as outlined in the owner’s manual published by Keltec during the life of this
warranty. Keltec reserves the right to ask for the photos of the failed part or the part itself delivered to its
warehouse. After inspection, if Keltec warranty department examination of the photo or returned part
concludes that such defect has occurred in normal service and was not due to apparent misuse, abuse or
accident, Keltec will repair or replace, at its sole discretion, the defective part free of charge and deliver it
FOB from its warehouse.
This warranty is not transferable. Any warranty service performed in the field must be authorized by
Keltec prior to service. Unauthorized service voids the warranty and any resulting charges will not be
paid for by Keltec.
Keltec makes no other warranties or guarantees, expressed or implied. Keltec assumes no liability for
indirect or consequential damages.