Advantage BG-N4 Series, Инструкция по эксплуатации

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BG-N4 Glycol Chiller
Page: 43
ADVANTAGE ENGINEERING, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729 Fax: 317-881-1277
Service Department Fax: 317-885-8683
Email: service@AdvantageEngineering.com
4.4 SHUTS OFF ON LOW PRESSURE CONTROL
A. Low or no water flow through the evaporator. Adjust the flow per section 3.2.C
B. Air-cooled units:
1. Low pressure too low. Contact factory or local refrigeration technician for
assistance
C. Low refrigerant charge. Check for adequate refrigerant charge (bubbles or misty
sight glass indicates low charge). If charge is low, have system checked for leaks and
recharged by a refrigeration serviceman.
D. Improperly set low pressure limit. Reset setting on control instrument per factory
service recommendations.
E. Restriction in the liquid line.
1. Clogged filter drier. Check for pressure or temperature drop and have drier core
replaced by a refrigeration serviceman.
2. Liquid line valve or suction valve on compressor is partially closed. Open
fully.
3. Liquid line solenoid not opening fully or leaking during off cycle. Have the
solenoid repaired or replaced if defective by a refrigeration serviceman.
4. Expansion valve plugged or inoperative. Check thermal bulb and capillary
tube for damage. Have repaired or replaced if defective by a refrigeration service
man.
4.5 COMPRESSOR SHUTS OFF ON INTERNAL OVERLOAD
A. Control does not reset. Have compressor windings and internal solid state safety
control checked by a refrigeration serviceman. Have it repaired or replace if defective.
4.6 LOW OR NO PROCESS PRESSURE OR WATER FLOW
A. Valves. Check if water valves are open.
B. Pump. Check pump for correct rotation. Check pump suction for restriction. Replace
motor if defective.
C. Filters. Check filter in the chilled water circuit and clean if necessary.
D. Pressure switch (or flow switch). Readjust or replace if defective.
E. Fuses and wiring. Have electrician check the fuses and wiring.