Lincoln Electric SVM149-A service manual User Responsibility, Operational Features and Controls

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B-3		OPERATION	B-3

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USER RESPONSIBILITY

Because design, fabrication, erection and cutting vari- ables affect the results obtained in applying this type of information, the serviceability of a product or structure is the responsibility of the user. Variation such as plate chemistry, plate surface condition (oil, scale), plate thickness, preheat, quench, gas type, gas flowrate and equipment may produce results different than those expected. Some adjustments to procedures may be necessary to compensate for unique individual con- ditions. Test all procedures duplicating actual field con- ditions.

OPERATIONAL FEATURES AND CONTROLS

The PRO-CUT 25 comes with an ON/OFF POWER SWITCH, OUTPUT CURRENT CONTROL, and

PURGE BUTTON.

DESIGN FEATURES AND

ADVANTAGES

The PRO-CUT 25 design makes plasma cutting uncomplicated. This list of design features and advan- tages will help you understand the machine's total capabilities so that you can get maximum use from your machine.

- Light weight and portable design for industrial use.

-Continuous control, 12 - 25 amps.

-Reliable touch start mechanism for plasma arc initia- tion.

-Rapid arc restrike for fast cutting of expanded metal.

-Input over voltage protection.

-Bright 3.0 second timed pilot arc.

-Purge momentary push button.

-Air regulator and pressure gage included.

-Parts-in-Place mechanism to detect proper installa- tion of consumables and torch.

-Latching Parts-in-Place mechanism. Requires the operator to turn the machine off and then on to reset.

-Preflow/Postflow timing. Preflow is eliminated if arc is re-initiated in Postflow.

-Thermostatic Protection.

-Solid state over-current protection.

-Automatic reconnect for 115 VAC or 230 VAC inputs.

-Dead front display for machine status.

-Unique electrode and Vortech™ nozzle design for optimum cooling and long life.

-Swirl texture inside Vortech™ nozzle for better start- ing reliability and higher quality cuts.

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PRO-CUT 25

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Contents PRO-CUT Safety Cylinder may explode if damaged Précautions DE Sûreté SafetyMaster Table of Contents for ALL Sections PRO-CUT Installation Section Table of ContentsTechnical Specifications PRO-CUT 25 K1756-1 InstallationInput Electrical Connections Safety Precautions Electric Shock can KillSelect Proper Location High Frequency Interference ProtectionGAS Input Connections Torch Output ConnectionsPRO-CUT Table of Contents Operation Section Description Safety PrecautionsPreheat Temperature for Plasma Cutting OperationOperational Features and Controls Design Features AdvantagesUser Responsibility Consumable Life Cutting CapabilityLimitations Controls and SettingsPilot ARC Discussion Apparently wrong, reset the machine by turningGeneral In All Cases Procedure RecommendationsPRO-CUT Accessories General Options Accessories Maintenance Electric Shock can kill Routine MaintenancePRO CUT PRO-CUT Table of Contents Theory of Operation Section Theory of Operation General DescriptionInput Line VOLTAGE, and Auxiliary Transformer Figure E.3 Precharge and Protection Precharge and ProtectionReturn Return to Section TOC Main TransformerFigure E.5 Plasma Output Section and Torch Figure E.6 Control Board Control BoardSafety PARTS-IN-PLACE Protection Protection CircuitsAccidental Operation Protection Insulated Gate Bipolar Transistor Igbt Operation Table of Contents Troubleshooting & Repair Section HOW to USE Troubleshooting Guide Troubleshooting & RepairPC Board Troubleshooting Procedures Output Problems Function Problems See the Operation section Troubleshooting & Repair LED Function Problems Description Input Filter Capacitor Discharge ProcedureRight Side of Machine Discharge ProcedureMain Inverter Board Resistance Test Right Side of Machine IGBT’s D2 D1 D11 D10 PRO-CUT Input Board Voltage Test Test Points Fan PRO-CUT Main Inverter Board Voltage Test P2 P1 P2 P1 PRO-CUT Torch Continuity and Solenoid Test Torch Continuity and Solenoid Test Torch Continuity and Solenoid Test PRO-CUT AIR/GAS Solenoid Test AIR/GAS Solenoid Test Control Board Removal and Replacement Small Red Cap Screws Over tighten Input Board Removal and Replacement Input Board Input Board Removal & Replacement PRO-CUT Main Inverter Board Removal and Replacement Main Board Main Inverter Board Removal & Replacement PRO-CUT Switch Removal and Replacement PRO FAN Removal and Replacement Fan Do Not Over tighten Machine Input and Output Retest After RepairTable of Contents Electrical Diagrams Section Electrical DiagramsInput Voltage Board Pressure SCHEMATIC- Control Printed Circuit Board Sheet Electrical Diagrams Electrical Diagrams PC Board Assembly Main Inverter Board PC Board Assembly Input Board Cutting Current Path SVM Error Reporting Form