Lincoln Electric SVM128-A Problems Possible Areas, Symptoms Misadjustments Course of Action

Page 65

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F-11

 

 

 

 

F-11

TROUBLESHOOTING & REPAIR

 

 

 

TROUBLESHOOTING GUIDE

 

 

Observe Safety Guidelines

 

 

 

detailed in the beginning of this manual.

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

RECOMMENDED

 

 

 

(SYMPTOMS)

 

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

 

 

 

ENGINE PROBLEMS

 

 

 

 

The engine “cranks” but will not

 

1.

Check for adequate fuel supply.

1. Check the ignition switch for

start.

 

2.

Press the engine protection

proper operation.

Check

the

 

 

associated leads

for

loose

or

 

 

 

“Reset” button.

 

 

 

faulty connections.

See

the

 

 

 

 

 

 

3. Check the fuse in the engine

Wiring Diagram.

 

 

 

 

 

 

protection relay.

2. Check the fuel injection pump.

 

 

 

 

 

 

 

 

Make sure it is operating when

 

 

 

 

12VDC is applied to leads

 

 

 

 

#59C(+) to #60(-).

 

 

 

 

 

 

 

3. The engine protection relay may

 

 

 

 

be faulty. Replace.

 

 

 

 

 

 

4. The engine fuel injectors may

 

 

 

 

need service.

 

 

 

 

 

 

 

 

The engine starts but shuts down

 

1.

Check for adequate fuel supply.

1. The oil pressure switch or

after a short period of time.

 

2. Check engine oil level.

coolant temperature

sensor

 

 

may be causing the engine pro-

 

 

 

 

 

 

3. Air may be entrapped in fuel

tection relay to shut off the fuel

 

 

 

system. Refer to Maintenance

injection pump. Make sure oil

 

 

 

section to bleed fuel system.

pressure and coolant tempera-

 

 

 

 

ture are correct before replacing

 

 

 

 

sensors.

 

 

 

 

 

 

 

2. The protection relay may be

 

 

 

 

faulty.

 

 

 

 

 

 

 

3. The engine fuel injectors may

 

 

 

 

need service.

 

 

 

 

 

 

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.

SA-250

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Contents SHIELD-ARCTMSA-250 SA-250 SafetyElectric Shock can kill Iii Welding Sparks can cause fire or explosionSûreté Pour Soudage a L’Arc Précautions DE SûretéMaster Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications SA-250 InstallationStoring Safety PrecautionsLocation and Ventilation PRE-OPERATION Engine Service Muffler Cooling SystemExhaust Spark Arrester TrailerWelding Cable Connections Electrical Output ConnectionsCircuit Breakers Auxiliary Power RECEPTACLES, PLUGS, and HAND-HELD EquipmentMachine Grounding SA-250 Table of Contents Operation Section Operation Safety InstructionsOperating Instructions General DescriptionDesign Features Operational Features and ControlsRecommended Applications WelderLimitations Welding CapabilityWELDER/GENERATOR Controls Controls and SettingsCurrent Range Selector Control of Welding CurrentFigure B.3 Diesel Engine Controls Diesel Engine ControlsBefore Starting the Engine Engine OperationStarting the Engine Check and fill the engine fuel tankBREAK-IN Period Stopping the EngineCold Weather Starting After you finish welding Welding OperationTable B.1 Range Settings for Wire SIZE/SPEED 12B-12 Auxiliary PowerTable of Contents Accessories OPTIONS/ACCESSORIES Semiautomatic Welding Accessories TIG Welding AccessoriesConnection of the LN-7 to Connection of Lincoln Electric Wire FeedersPIN Amphenol Unused Lead Individually Connection of the LN-25 toFigure C.4 SA-250/LN-25 Across the ARC Connection Diagram Control K487-25 Table of Contents Maintenance Engine Maintenance Routine and Periodic MaintenanceFigure D.1 OIL Drain and Refill Eliminate Air from the Fuel System HOW to Eliminate AIR from the Fuel System Figure D.4 Eliminating AIR from the Fuel System Self-vent methodFigure D.5 Engine Coolant Drain Plug Figure D.6 Tightening the FAN Belt Starting Engine Daily or BeforeFirst 25-50 Hours EveryCleaning the Battery Battery MaintenanceWELDER/GENERATOR Maintenance Idler Maintenance Figure D.5 Major Component Locations SA-250 Table of Contents Theory of Operation Section Circuits Theory of OperationALTERNATOR, and Protection Auxiliary and Field Feedback Coils Excitation FlashingEngine Idler Circuit Interpole and Series Coils Fine Current AdjustmentCurrent Range Selector Mechanical Coupling DC Generator MachinesSA-250 Table of Contents Troubleshooting & Repair Section HOW to USE Troubleshooting Guide Troubleshooting & RepairPC Board can be damaged by static electricity PC Board Troubleshooting ProceduresDetailed in the beginning of this manual Troubleshooting GuideObserve Safety Guidelines Shunt Field Winding Test Field Shunt Winding Test Output Problems Function Problems Function Problems Troubleshooting & Repair Symptoms Misadjustments Course of Action Problems Possible AreasWelding Problems Materials Needed Alternator Rotor TestTest Description Slip Rings Brushes Test ProcedureFigure F.2 Measuring Rotor Resistance Figure F.3 Measuring Rotor Resistance to Ground Field Shunt Winding Test Field Shunt Winding Test PIN TAB Idler Solenoid Test Idler Solenoid Test Engine Throttle Adjustment Test Strobe Tach Method Engine Throttle Adjustment TestOscilloscope Method Frequency Counter MethodAdjusting Screw Locking NUT Description Flashing the FieldsDo not remove brush holder ProcedureHigh Idle no Load Fine Current Control Rheostat AT Maximum Scope SettingsNormal Open Circuit Voltage Waveform 115VAC Supply Normal Open Circuit DC Weld Voltage Waveform Typical DC Weld Output Voltage Waveform Machine Loaded Selector Switch AT Maximum PositionAlternator Rotor Removal Replacement Alternator Rotor Removal ReplacementLoosen Screws Alternator Cover Slip Rings Brushes Figure F.13 Rotor Removal Replacement Alternator Stator Removal and Replacement Alternator Stator Removal ProcedureField Bridge Rectifier VAC Receptacle Circuit Breaker Genernator Brush HOLDER/COIL Cables Figure F.18 Drill Spot Locations Generator Frame Removal and Replacement See Figure F.19 for steps 4 Generator Frame RemovalFigure F.20 Wire and Selector Switch Connections Figure F.21 Case Front Removal Rope Sling ENGINE/GENERATOR Mounting Holes Troubleshooting & Repair Generator Armature Removal and Replacement Figure F.23 Blower Paddle Removal Generator Armature RemovalRetest After Repair AC Auxiliary Power Receptacle OutputEngine Output Welder DC OutputSA-250 Electrical Diagrams Section Section G SA-250 Wiring Diagram Electrical DiagramsWire Feed Module Wiring Diagram Idler PC Board M13708 Schematic Idler PC Board M13708 Components SVM Error Reporting Form

SVM128-A specifications

The Lincoln Electric SVM128-A is a cutting-edge welding machine designed to meet the demands of both professional welders and DIY enthusiasts. This versatile welding power source brings together advanced technology and robust design, making it a reliable choice for various welding applications.

One of the standout features of the SVM128-A is its capability to perform multiple welding processes. It supports MIG, TIG, and stick welding, allowing users to tackle a wide range of projects with ease. This multi-functionality makes it ideal for professionals working in different industries, as well as for hobbyists who enjoy diverse welding tasks.

The SVM128-A is equipped with inverter technology, which enhances its performance by providing a more stable arc and improved energy efficiency. This technological advancement contributes to lower operational costs and allows for a more consistent weld quality across different materials and thicknesses. Additionally, the inverter technology enables the machine to be lightweight and portable, making it convenient for jobs that require mobility.

Another prominent characteristic of the SVM128-A is its user-friendly interface. The machine features intuitive controls and a digital display that allows operators to easily set the desired welding parameters. This simplified setup helps reduce the learning curve for new users while also offering precise control for experienced professionals.

The Lincoln Electric SVM128-A is designed with durability in mind. Its robust construction ensures that it can withstand the rigors of frequent use in demanding environments. The machine is also equipped with various safety features, including thermal overload protection and a duty cycle rating that prevents overheating, ultimately extending its lifespan.

For optimal performance, the SVM128-A provides adjustable output options, allowing users to customize the welding parameters based on their specific needs. This flexibility makes it suitable for welding various metals, including steel, aluminum, and stainless steel.

In summary, the Lincoln Electric SVM128-A combines versatility, advanced technology, and a user-friendly design. With its capability to perform multiple welding processes, lightweight construction, and durable features, it stands out as an excellent option for anyone looking to achieve high-quality welds. Whether for professional or personal use, the SVM128-A is poised to deliver reliable performance and exceptional results.
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