Lincoln Electric IM904 manual Preventive Maintenance

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D-2	MAINTENANCE	D-2

PREVENTIVE MAINTENANCE

1.Perform the following preventive maintenance pro- cedures at least once every six months. It is good practice to keep a preventive maintenance record; a record tag attached to the machine works best.

2.Remove the machine wraparound cover and per- form the input filter capacitor discharge procedure (detailed at the beginning of this chapter).

3.Clean the inside of the machine with a low pres- sure airstream. Be sure to clean the following components thoroughly.

•Power Switch, Driver, Protection, and Control printed circuit boards

•Power Switch

•Main Transformer

•Input Rectifier

•Heat Sink Fins

•Input Filter Capacitors

•Output Terminals

•Lower base compartment

4.Examine capacitors for leakage or oozing. Replace if needed.

5.Examine wraparound cover for dents or breakage. Repair as needed. Cover must be kept in good condition to assure high voltage parts are protected and correct spacings are maintained.

6.Check electrical ground continuity. Using an ohm- meter, measure resistance between either output stud and an unpainted surface of the machine case. Meter reading should be 500,000 ohms or more. If meter reading is less than 500,000 ohms, check for electrical components that are not prop- erly insulated from the case. Correct insulation if needed.

7.Replace machine cover and screws.

INVERTEC STT II (CE)

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Contents Invertec S T T II CE Safety Depends on YouCalifornia Proposition 65 Warnings SafetyElectric Shock can kill Iii Welding Sparks can cause fire or explosionSûreté Pour Soudage a L’Arc Précautions DE SûretéThank You Table of Contents Technical Specifications -INVERTEC STT II CE For Code InstallationINPUT- Three Phase only Tilting Select Suitable LocationInput Connections StackingGround Connection Input Cable Installation and CON- NectionOutput Connections Input Voltage Reconnect ProcedureWire Feeder Output Connections To Operate at ProcedureGeneral Warnings Safety PrecautionsOperation Operating InstructionsOperating Controls Design Features and AdvantagesRecommended Equipment Welding Capability3B. Peak Current Display Meter This Power Switch Turns outputAuxiliary Power Circuit Breaker Wire Feeder Receptacle This isPeak Current Welding Parameters and GUIDE- LinesWelding Procedures for STT Options / Accessories Accessories LN-742 or STT-10 Wire Feeder Connection Instructions Figure C.3 STT-10 to STT II Connection Input Filter Capacitor Discharge Procedure MaintenancePreventive Maintenance HOW to USE Troubleshooting Guide TroubleshootingFacility Problems Symptoms Possible CauseAuthorized Field Service Recommended Course of ActionProblems Possible Symptoms Cause Troubleshooting Troubleshooting Problems Symptoms Possible Cause Wiring Diagram Invertec STT II CE for Code Diagrams Wiring Diagram Invertec STT II CE for CodeDIAGRAMSF-3 Dimension Print STT II CEInvertec STT II CE Invertec STT II CE Invertec STT II CE Precaucion Warnung