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Lincoln Electric SVM154-A service manual Function Problems

Models: SVM154-A

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F-8

TROUBLESHOOTING AND REPAIR

F-8

Observe all Safety Guidelines detailed throughout this manual.

PROBLEMS	POSSIBLE AREAS OF					RECOMMENDED
(SYMPTOMS)	MISADJUSTMENT(S)					COURSE OF ACTION

FUNCTION PROBLEMS (Continued)

The “Cold Feed Forward” and/or	1.	Check the connectors and wires				1.	Perform the Keypad Resis-
the “Cold Feed Reverse” buttons		between the display board and					tance Test .
do not function properly. The motor		the control board for loose or
operates properly in other modes.		faulty connections. (J11 and J3)				2.	The display board may be
							faulty.
	2.	Check	the connector		J10
		between the keypad and the				3.	The control board may be
		display	board	for	loose		faulty.
		connections.

The “Gas Purge” button does not	1.	Check the connectors and wires				1.	Perform the Keypad Resis-
activate the gas solenoid. The gas		between the display board and					tance Test.
solenoid operates properly in other		the control board for loose or
modes.		faulty connections. (J11 and J3)				2.	The display board may be
							faulty.
	2.	Check	the connector		J10
		between the keypad and the				3.	The control board may be
		display	board	for	loose		faulty.
		connections.

The “Procedure” button does not	1.	Check the connectors and wires				1.	Perform the Keypad Resis-
function properly.		between the display board and					tance Test.
		the control board for loose or
		faulty connections. (J11 and J3)				2.	The display board may be
							faulty.
	2.	Check	the connector		J10
		between the keypad and the				3.	The control board may be
		display	board	for	loose		faulty.
		connections.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 1-800-833-9353.

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LN-10

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Lincoln Electric SVM154-A service manual Function Problems

Contents

SVM154-A ISAFETYi Fumes and Gases SafetyIii 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 InstallationGeneral Description Technical Specifications LN-10 Head & ControlInstallation of the LN-10 Boom Mount Wire Feeder Components Safety PrecautionsMounting the 10 Series Wire Drive Recommended Processes and EquipmentMounting the LN-10 Control Box Mounting Synergic 7F Wire Drive Unit K679-1 orConnecting Wire Drive Unit to Control Box Control Speed Range Setting Wire Drive Speed Range SelectionSeries Wire Drive Ratio Selection Electrode RoutingProcedure to Install Drive Roll and Wire Guides Wire Feed Drive Roll KitsSeries Wire Drive Roll Kit Installation KP1505 and KP1507 Synergic 7F Wire Drive 4-Roll Kits KP655 and KP656GUN and Cable Assemblies with FAST-MATE Connection GUN and Cable Assemblies with Standard ConnectionGmaw Guns Innershield GunsSeries Wire Drive Water Connections for Water Cooled Guns 8INSTALLATIONA-8Cylinder may explode if damaged Buildup of Shielding GAS may harm health or killInput Cable LN-10 Control to Power Source Electrical InstallationBoom and Bench Conversions Optional Features InstallationMaterials Required for bench to boom conversion Materials Required for boom to bench conversionOperation Table of Contents Operation SectionSetting the DIP Switches LN-10 Control DIP Switch SetupWire Drive Head Selection Setup DIP Switch AccessWelding Power Source Selection Security Mode Selection Step Trigger Mode Operation SelectionMetric/English Wire Feed Speed Display Selection S2 switch 1 on = m/minS2 switch 4 on = Robotics mode on Maximum Limits Setting Mode SelectionS2 switch 6 on Minimum Limits Setting mode on S2 switch 4 OFF = Robotics mode OFF As shippedProcedure Lights Indicate which Power-Down SaveKeypad and Display Operation Keypad and Display DescriptionTrigger Mode Selection Display Control Keys Digital Memory Voltmeter Control Control Select key enables operator toMaximum and Minimum Limits Setting Modes Wire Reel Loading READI-REELS Spools or Coils Dual Procedure RemoteFigure B.2 Making a Weld Procedure for Setting Angle of FeedplateGAS Guard Regulator Setting Wire Feed Overload Protection Wire Reel ChangingGrounding Lead Protector DH-10Display Prompt or Error Explanation of Prompting Error MessagesTable of Contents Accessories Section AccessoriesGeneral Table C.1 LN-10 Wire Feeder AccessoriesCored Electrode Wire Size Solid Steel ElectrodeAluminum Electrode Aluminum Electrode For use with Binzel Guns OnlyK683-3 Dual Procedure Switch K683-1 Dual Procedure SwitchK1449-1 Dual Procedure Input Cable AssembliesGUN Adapters for 10 Series K1558-1 Remote Switch Interface ModuleGUN and Cable Assemblies K1561-1 Robotics Interface ModuleK1555-1 Insulated Lift Hook K1557-1 Swivel MountK1556-1 Light Duty Caster KIT Table of Contents Maintenance Section MaintenanceAvoiding Wire Feeding Problems Safety Precautions MaintenanceRoutine Maintenance Periodic MaintenanceFigure D.1 Major Component Locations Theory of Operation Table of Contents Theory of Operation SectionControl Board Input RECEPTACLE, Control Board and Operator Controls Figure E.3 LN-10 Wire Feed Head and Receptacle Wire Feed Head ReceptacleTheory of Operation Protection and Shutdown Wire Feed Overload Loss of Voltage Sense Protection ShutdownLN-10 Table of Contents Troubleshooting and Repair Section Troubleshooting and RepairReturn to Return to Master TOC HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures LN-10 Function Problems Troubleshooting GuideFunction Problems Power Source Selection Function Problems Mode Selection Perform the Encoder Board Test Troubleshooting and Repair Mum and minimum limit set Perform the Gas Solenoid Test Feeding Problems Welding Problems LN-10 Wire Drive Motor Test Test ProceduresTest Description Materials NeededTest Procedure Wire Drive Motor TestMaterials Needed Tach Adjustment and Feedback TestTach Adjustment and Feedback Test 20TROUBLESHOOTING and REPAIRF-20Tach Adjustment Procedure LN-10 Keypad Resistance Test Keypad Resistance Test 24TROUBLESHOOTING and REPAIRF-24Control Ohms 50 Ohms Typical LN-10 Encoder PC Board Test Figure F.4 Encoder PC Board Test Encoder PC Board TestGAS Solenoid Test GAS Solenoid Test 30TROUBLESHOOTING and REPAIRF-30Display PC Board Removal and Replacement Component Replacement ProceduresDisplay PC Board Removal and Replacement 32TROUBLESHOOTING and REPAIRF-32Removal Procedure Replacement ProcedureGAS Solenoid Removal and Replacement GAS Solenoid Removal and Replacement 34TROUBLESHOOTING and REPAIRF-34Encoder PC Board Removal and Replacement Figure F.8 Encoder PC Board Removal and Replacement Encoder PC Board Removal and ReplacementWire Drive Motor and Gear BOX Removal and Replacement Figure F.9 Wire Feed Assembly Removal Wire Drive Motor and Gear BOX Removal and ReplacementTo Remove the Drive Motor from the Gear BOX To Remove the Wire Drive Assembly from the Gear BOXReplacement Procedures Current Sensing Reed Switch Removal and Replacement Current Sensing Reed Switch Plug Retest After Repair Check Wire Feed Speed RangeElectrical Diagrams Section Wiring Diagram LN-10 Control Electrical DiagramsElectrode Cable From Current Sensor Wiring Diagram LN-10 Wire DriveSchematic Control PC Board #1 Circuitry Tach Schematic Control PC Board #23168 G PC Board ASSEMBLY-CONTROL5VA Schematic Display PC BoardBoard 22066 Schematic Encoder PC BoardEncoder PC Board ASSEMBLY-ENCODERSVM Error Reporting Form