Table of Contents

TABLE OF CONTENTS
	Page
Safety Precautions	2-5
Introductory Information	7
Meaning of Graphic Symbols	8-11
General Machine Description	12
Recommended Processes & Equipment	12
Design Summary	12
Operational Features & Controls	12-14
Technical Specifications	15
Installation	16-18
Safety Precautions	16
Location	16
Application Limitations	16
Stacking	16
Input Power Connections	16
Output Cable Connections	17
Installation of Field Installed Options	17-18
Installation of Equipment Required for Recommended Processes	18
Operating Instructions	19
Safety Precautions	19
Power Source Operation	19-21
Duty Cycle	19
Starting the Machine	19
Control Settings & Descriptions	19-21
Maintenance	21
Routine Maintenance	21
Troubleshooting	22-25
Procedure for Replacing P.C. Boards	26
Remote Control & System Checks	27
Twist Mate Welding Cable Plug Instructions	28
Diagrams	29-30
Parts Pages	P236 Series

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Contents

IM481-B Safety Depends on You Safety Electric Shock can kill Iii Welding and Cutting Sparks can Cause fire or explosion Sûreté Pour Soudage a L’Arc Précautions DE Sûreté Please Examine Carton and Equipment For Damage Immediately Table of Contents Output Control Dial Meanings of Graphic SymbolsPower ON-OFF Switch Output Control LOCAL-REMOTE Switch Circuit Breaker Voltmeter SwitchThermal Protection Light Degree of protection provided by the enclosure Rating Plate Signifying the Chassis Ground Connection Earth Ground ConnectionSignifying the Earth Ground Connection Chassis Ground Connection Design Summary Operational Features & ControlsGeneral Machine Description Recommended Processes & Equipment Case Features Auxiliary Power ConnectionsRemote Control Connections WATER COOLER CONNECTOR Paralleling Machine & Circuit Protection Thermal Protection LightMETER OPTION Technical Specifications FALLING EQUIPMENT can cause InstallationSafety Precautions Input Power Connections Electric Shock can kill Installation of Field Installed OptionsOutput Cable Connections Output Cables Undercarriages K817P, K841 Wire Feeder Control Cable ConnectionsConnection of CV 500-I to LN-22 or LN-25 Duty Cycle Amps Volts Power Source OperationSafety Precautions ELECTRIC SHOCK can kill Operating Instructions PIN LEAD NO Function Front View of 14-PIN Connector ReceptacleTerminal Strip Connections Routine Maintenance VAC Auxiliary Power for Water CoolerMachine and Circuit Protection HOW to USE Troubleshooting Guide Troubleshooting Trouble Cause What To Do TROUBLESHOOTING GUIDE Faulty Output Control potentiometer Trouble Cause What To Do Output Voltage Connecting the Remote Control to the MachineFault Protection Operation Power I/O Switch Check Power Silicon Controlled Rectifier Test Remote Control CheckPower Rectifier Bridge Assembly Checking Procedure Power Diode Test Rubber Boot To plug To T1 main transformer Gate leads plug to Control P.C. board Enhanced Diagram Page Page Precaucion Warnung

Lincoln Electric IM481-B manual Table of Contents

Models: IM481-B