Lincoln Electric SVM188-A service manual ISAFETYi

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iSAFETYi

WARNING

CALIFORNIA PROPOSITION 65 WARNINGS

Diesel engine exhaust and some of its constituents

 

The engine exhaust from this product contains

are known to the State of California to cause can-

 

chemicals known to the State of California to cause

cer, birth defects, and other reproductive harm.

 

cancer, birth defects, or other reproductive harm.

 

 

 

The Above For Diesel Engines

 

The Above For Gasoline Engines

ARC WELDING can be hazardous. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH.

KEEP CHILDREN AWAY. PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING.

Read and understand the following safety highlights. For additional safety information, it is strongly recommended that you pur- chase a copy of “Safety in Welding & Cutting - ANSI Standard Z49.1” from the American Welding Society, P.O. Box 351040, Miami, Florida 33135 or CSA Standard W117.2-1974. A Free copy of “Arc Welding Safety” booklet E205 is available from the Lincoln Electric Company, 22801 St. Clair Avenue, Cleveland, Ohio 44117-1199.

BE SURE THAT ALL INSTALLATION, OPERATION, MAINTENANCE AND REPAIR PROCEDURES ARE PERFORMED ONLY BY QUALIFIED INDIVIDUALS.

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FOR ENGINE powered equipment.

1.a. Turn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running.

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1.b.Operate engines in open, well-ventilated areas or vent the engine exhaust fumes

outdoors.

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1.c. Do not add the fuel near an open flame weld- ing arc or when the engine is running. Stop the engine and allow it to cool before refuel- ing to prevent spilled fuel from vaporizing on contact with hot engine parts and igniting. Do not spill fuel when filling tank. If fuel is spilled, wipe it up and do not start engine until fumes

have been eliminated.

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1.d. Keep all equipment safety guards, covers and devices in posi- tion and in good repair.Keep hands, hair, clothing and tools away from V-belts, gears, fans and all other moving parts when starting, operating or repairing equipment.

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1.e. In some cases it may be necessary to remove safety guards to perform required maintenance. Remove guards only when necessary and replace them when the maintenance requiring their removal is complete. Always use the greatest care when working near moving parts.

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1.f. Do not put your hands near the engine fan. Do not attempt to override the governor or idler by pushing on the throttle control rods while

the engine is running.

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1.g. To prevent accidentally starting gasoline engines while turning the engine or welding generator during maintenance work, disconnect the spark plug wires, distributor cap or magneto wire as appropriate.

1.h. To avoid scalding, do not remove the radiator pressure cap when the engine is hot.

ELECTRIC AND MAGNETIC FIELDS may be dangerous

2.a. Electric current flowing through any conductor causes localized Electric and Magnetic Fields (EMF). Welding current creates EMF fields around welding cables and welding machines

2.b. EMF fields may interfere with some pacemakers, and welders having a pacemaker should consult their physician before welding.

2.c. Exposure to EMF fields in welding may have other health effects which are now not known.

2.d. All welders should use the following procedures in order to minimize exposure to EMF fields from the welding circuit:

2.d.1. Route the electrode and work cables together - Secure them with tape when possible.

2.d.2. Never coil the electrode lead around your body.

2.d.3. Do not place your body between the electrode and work cables. If the electrode cable is on your right side, the work cable should also be on your right side.

2.d.4. Connect the work cable to the workpiece as close as possible to the area being welded.

2.d.5. Do not work next to welding power source.

Mar ‘95

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Contents DC-600 ISAFETYi Fumes and Gases SafetyElectric Shock can kill Can be dangerousPowered equipment For ElectricallyPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcElectromagnetic Compatibility EMC Safety Master Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications DC-600Select Proper Location Safety PrecautionsElectric Shock can Kill Ground Connection Fuse and Wire SizesElectrical Input Connections Reconnect Procedure Connection for Highest Rating Plate VOLTAGE, 50 or 60 HZConnection for 440 Volts 50 or 60 HZ V 60HZ See Machine Rating Plate for Required Input Supply Voltage Connections Output ConnectionsELECTRODE, Work and #21 Lead Terminal Strip 2 T.S.2 Auxiliary Power Control ConnectionsTerminal Strip 1 T.S.1 DC-600 Table of Contents Operation Section Safety Precautions OperationRecommended Processes and Equipment Design Features AdvantagesGeneral Description Welding Capability Meanings of Graphical Symbols on Case FrontOFF Input Power Output Control Output Voltage CurrentMeaning of Graphical Symbol for Ground CON- Nection Controls and SettingsAuxiliary Power in MS-RECEPTACLE OVERLOAD, OVERCURRENT, and Fault ProtectionOperating Steps Remote Control of Machine OperationWelding Procedure Recommendations NA-3 Automatic Wire Feeder RemoteLN-8 or LN-9 SEMI-AUTOMATIC Wire Feeder LN-7 and Other Constant Wire FeedersDC-600 Table of Contents Accessories Section Factory or Field Installed Options AccessoriesWire Feeders and Tractors Field Installed OptionsFigure C.2 MULTI-PROCESS Switch Cable Connections Accessories Table of Contents Maintenance Section Routine and Periodic Maintenance MaintenanceSafety Precautions Electric Shock can Kill 1TABLE of CONTENTS-THEORY of Operation Section E-1 Theory of Operation Input Circuit and Main TRANS- FormerFiring Board Firing CIRCUIT, Control CIR- Cuit and RectificationRectification Thermal Protection SCR Operation DC-600 1TABLE of Contents Troubleshooting and Repair F-1 2TROUBLESHOOTING and REPAIRF-2 HOW to USE Troubleshooting GuideTroubleshooting and Repair PC Board Troubleshooting ProceduresControl Feeder. See Protective Devices Check all three phase input Output Control J1,Pin2. See Wiring Diagram Wiring Diagram Materials Needed PC Board Troubleshooting GuideTest Description PC Board Troubleshooting Guide Control Board Figure F.2 Control Board LEDsDC-600 Internal Trigger Circuit Test Procedure Internal Trigger Circuit TestInternal Trigger Circuit Test 75 76DC-600 Firing Board Test Firing Board Test Control Board Test Control Board Test Figure F.7 Control BoardMain Transformer Voltage Test Main Transformer Voltage Test Figure F.8 Input Contactor and Reconnect PanelFigure F.9 Transformer Secondaries Main Transformer Voltage Test Control Transformer Test Procedure Control Transformer TestInput Contactor Test Input Contactor Test Voltage TestSCR Bridge Test Anode Cathode Remove Insulating Paint SCR Bridge TestActive Test Scope Settings Maximum Output Setting no Load Minimum Output Setting no Load 35TROUBLESHOOTING and REPAIRF-35 2V/Div Volts DC-600 Input Contactor CR1 CLEANING/REPLACEMENT Contactor Replacement Procedure Input Contactor CLEANING/REPLACEMENT ProcedureCleaning Procedure SCR Rectifier Bridge Removal and Replacement Procedure Removal Procedure 42TROUBLESHOOTING and REPAIRF-42Removal and Replacement Procedure SCR Rectifier BridgeReplacement Procedure Insulator Lock Washer Plain Washer Output Snubber LeadDC-600 Main Transformer and Choke Removal and Replacement Removal and Replacement Main Transformer and ChokeRemoval Procedure Weld Input Idle Amps and Watts Maximum Open Circuit VoltagesDC-600 Table of Contents Diagram Section Electrical Diagrams Wiring Diagram 230/460/575 Volt Machines G3506-1 Schematic Complete Machine G3575 Schematic Control PC Board G3408-1 Control PC Board Assembly G3409-1 Schematic Firing PC Board G3741-1