Sterling A0554831 manual HP Portable Chillers Troubleshooting

Page 41

Chapter 6: Troubleshooting

 

Problem

Possible cause

 

 

No power.

 

 

 

 

 

Wrong voltage supplied to unit.

 

 

 

 

 

Defective on/off switch.

 

Unit does not run.

Control circuit fuse blown.

 

 

 

 

 

 

 

Defective control transformer.

 

 

Piping flow switch circuit open.

 

 

 

 

 

Pump motor off on overload.

 

 

High/Low thermostat set higher

 

 

than temperature of liquid in

 

 

system.

 

 

Defective High/Low thermostat.

 

 

Low refrigerant indicator on.

 

 

Refrigerant low pressure switch

 

 

contacts open.

 

Refrigerant high-pressure indicator

 

on.

 

 

Pump runs; compressor does not.

Fan motor out on overload.

 

Defective fan cycling control.

 

Defective fan motor.

 

 

 

Compressor internal overload or

 

fuses are open.

 

 

 

Compressor contactor holding coil

 

open.

 

 

 

Defective pump motor to

 

compressor auxiliary contact.

 

 

 

Broken wire in the compressor

 

control circuit.

Solution

Check main disconnect, fuses, wiring, and power lead to unit.

Voltage must be within plus or minus 10% of nameplate rating.

Replace.

Replace control circuit fuse. Check transformer.

Check for a short circuit. Replace.

Add water or water/glycol solution as required.

Reset and test.

Lower thermostat stage 1 set to 10°F (6°C) below the leaving temperature you want.

Replace.

Check refrigerant charge.

Sight glass should be clear and the moisture indicator should be green while compressor is running. Bubbles or foaming is normal when the hot-gas by- pass solenoid is energized. Call for service if bubbling is occurring and/or moisture indicator is yellow.

Clean the air filters.

Check condenser fans for proper rotation.

Check for dirty condenser. Reset and test.

Reset and test. Replace.

Repair or replace.

Allow time to cool and reset, then check for high/low volt-age. It must be within plus or minus 10% of the nameplate rating.

Check for open fuses and loose compressor electrical connections.

Repair or replace.

Repair or replace.

Locate and repair.

2-40 HP Portable Chillers

Chapter 6: Troubleshooting

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Contents Hp Portable Chillers Shipping Information Table of Contents Operation HP Portable Chillers Safety Symbols Used in this Manual SafetyHow to Use This Manual Responsibility Wear Safety Glasses and Work GlovesModels Covered in This Manual Functional DescriptionRefrigeration Circuit General DescriptionChilled Water Circuit Other Mechanical Features Standard FeaturesMechanical Features Refrigeration Features Electrical FeaturesController Features Other FeaturesHigh/Low Thermostat Control Safety Devices and InterlocksCrankcase Heater High Pressure CutoutPressure Switch Fan Cycling SwitchFlow Switch Low Pressure CutoutOptional Features Mounting Features Optional Pump Amperages Voltage Construction Full Load Amps Electrical Connections InstallationUncrating Bypass Valve Considerations Process Water ConnectionsGalvanic Corrosion Considerations Water Treatment ConsiderationsAir-Cooled Chiller Condensers Condenser ConsiderationsWater-Cooled Chiller Condensers Remote Air-Cooled Chiller Condensers Page Equivalent Length in Feet for Valves and Fittings Refrigerant Charge Determination Chiller Condenser Charge Field Installed Piping ChargeChecking Motor Direction Three-Phase CompressorsWater Pumps Condenser FanPart Number Description Water ReservoirEthylene Glycol and Propylene Glycol Curves Automatic Water Make-Up Option Initial Start-Up E5CK Controller Indicator Name Description Panel Buttons, Indicator Lights, and SwitchesOperation Microprocessor ControllersSterlco 2000 Controller Indicator Name Description Indicator Name DescriptionE5CK Graphic Panel See Figure Indicator Name DescriptionIndicator Name Description Eurotherm 3216 Controller Typical Graphic Panels With E5CK ControllerAuto-Tuning Setting the Process Water TemperaturesStart-up Optional CommunicationsProgramming the Electronic High/Low Thermostat Thermostat Buttons Indicator Name DescriptionStage 1 Freeze Protection Stage 2 High Temperature ProtectionSelect Fahrenheit or Celsius Lubrication MaintenanceFilter Cleaning Maintaining the Evaporator Maintaining the CondenserEvaporator Process Piping Y-Strainer Air- and Remote Air-Cooled ChillersPreventative Maintenance Service HP Portable Chillers Troubleshooting TroubleshootingHP Portable Chillers Troubleshooting Appendix Warranty ReturnsReturned Material Policy Credit ReturnsTechnical Assistance Service DepartmentParts Department Sales DepartmentHp and 3 1/2 hp Air-Cooled Portable Chillers Drawings and SpecificationsHp and 7.5 hp Air-Cooled Portable Chillers Hp and 15 hp Air-Cooled Portable Chillers 20 hp, 25 hp, and 30 hp Air-Cooled Portable Chillers Nominal Condenser water Nominal cooling Water Com Hp and 3.5 hp Water-Cooled Portable ChillersIn. NPT Height Width Depth Lbs 28.3 22.0 41.7 28.3 22.0 41.7Hp and 7.5 hp Water-Cooled Portable Chillers Hp and 15 hp Water-Cooled Portable Chillers 20 hp, 25 hp, and 30 hp Water-Cooled Portable Chillers 81.9 63.1 85.0 66.2 Hp Water-Cooled Portable Chillers39.5 39.1 98.4 Hp and 7.5 hp Remote Air-Cooled Portable Chillers Nominal cooling Com Hp and 15 hp Remote Air-Cooled Portable ChillersIn. dia. ODS Pump Pumps Discharge Liquid Rated Running 15.0 40.9 34.0 74.7Nominal cooling Com Refrigeration Hp through 40 hp Remote Air-Cooled Portable ChillersPres Nom Connections To/from No tank Tank, to/from Height Width Depth Lbs‘A’in ‘B’in ‘C’in ‘D’in ODSin Remote Condenser Assembly ModelsHertz Pump Curves Pump Curves, Flow, and Pressure ConsiderationsDWG. No. S0554823 Calculating Chiller Nominal Flow and Pressure to Process Evaporator Water Pressure Drop TablesEvaporator Flow and Pressure Considerations Recirculation Pump SpecificationsRecirc. power Flow Rate Pressure Gpm Lpm Psi KPa Remote Air-Cooled Chiller Configurations Typical Ductwork for Air-Cooled Chillers Central and Gravity Return Piping with Standpipe Diagram Piping DiagramsTypical Piping Schematic, 2 and 3 1/2 hp Models HP Portable Chillers Appendix HP Portable Chillers Appendix Typical Piping Schematic, 5 hp through 40 hp, No-Pump Models HP Portable Chillers Appendix Typical Electrical Subpanel Electrical Schematics

A0554831 specifications

The Sterling A0554831 is a versatile and powerful tool designed for a range of applications, particularly in the industrial and construction sectors. Known for its robust construction and reliability, it has gained popularity among professionals and DIY enthusiasts alike.

One of the main features of the Sterling A0554831 is its durable build quality, which is designed to withstand harsh working conditions. The device typically features a high-strength casing that protects it from dust, moisture, and impact, ensuring longevity even in the most demanding environments. Its ergonomic design allows for comfortable handling, minimizing user fatigue during extended use.

In terms of performance, the Sterling A0554831 is equipped with advanced technologies that enhance its efficiency and functionality. The device is powered by a high-torque motor, delivering impressive power that enables it to tackle heavy-duty tasks with ease. The precision-engineered components ensure consistent performance, making it ideal for tasks that require accuracy and reliability.

Another significant characteristic of the Sterling A0554831 is its versatility. It typically comes with multiple settings and modes, allowing users to adjust the tool according to the specific requirements of their project. Whether drilling, cutting, or fastening, the tool can accommodate various tasks, making it a valuable addition to any toolkit.

Safety features are also a priority with the Sterling A0554831. Many models are equipped with overload protection and safety switches that prevent accidental activation, safeguarding the user during operation. Additionally, some variants may include LED indicators that provide real-time information about battery life or operational status, enhancing overall user experience.

In conclusion, the Sterling A0554831 stands out in the market for its combination of durability, performance, and versatility. With advanced technologies that cater to a wide range of applications and a design focused on user comfort and safety, this tool is an excellent choice for professionals looking for dependable and effective solutions in their work. Whether you are a seasoned professional or a casual DIYer, the Sterling A0554831 is well-equipped to handle your needs with ease and efficiency.
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