See the Output Filter | Lincoln Electric SVM161-A specs

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F-8	TROUBLESHOOTING AND REPAIR								F-8
F-8									F-8

Observe Safety Guidelines detailed in the beginning of this manual.

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

			WELDING PROBLEMS
The machine does not have weld-		1.	Make sure the machine is prop-	1. Check for output voltage feed-
ing output in the Stick mode. Zero			erly set-up and configured for	back from the Output Filter
volts open circuit voltage. The			Stick mode.	Board.	See the Output Filter
Output LED on the control panel is				Board Test.
blinking.	The machine operates			2. Check	for output voltage feed-
correctly in the TIG mode				2. Check	for output voltage feed-
correctly in the TIG mode				back through the Bus Board.
				back through the Bus Board.
				See the Bus Board Test.
				3. The Control/Display Board may
				be faulty.

The machine does not have welding		1.	Make sure the correct input volt-	1. The output		rectifier may			be
output in either the Stick or TIG			age is applied to the machine.	faulty. Check and replace if nec-
modes.	Zero volts open circuit.		230 or 115VAC.	essary.	See the		Secondary
The Output LED on the control				Output Board Assembly Test
panel is blinking.				and Wiring Diagram.
				2. The Output Clamp Board may be
				faulty.
				3. The Output		Module Transistor
				Board may be faulty. See the
				Secondary		Output		Board
				Assembly		Test	and	Wiring
				Diagram.
				4. Perform the Main IGBT Inverter
				Board	Welding		Logic		and
				Inverter Test.
				5. The Superimposition Board may
				be faulty.
				6. The Hall Effect device may be
				faulty.
				7. The Control/Display Board may
				be faulty.

The machine operates properly in		1.	Make sure the machine is set-up	1. The Output		Module Transistor
the Stick and DC TIG modes. AC			and configured correctly for the	Board may be faulty.				See the
TIG mode does not function prop-			AC TIG mode.	Secondary		Output		Board
erly.				Assembly		Test	and	Wiring
				Diagram.
				2. The Superimposition Board may
				be faulty.

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 1-888-935-3877.

INVERTEC® V205-T AC/DC™

Image 48

Lincoln Electric SVM161-A service manual See the Output Filter

Contents

Invertec V205-T AC/DC Safety Invertec V205-T AC/DC Electric Shock can kill ARC Rays can burn Can be dangerous Powered equipment Welding CuttingCylinder may explode Sparks can cause fire or If damaged Explosion Précautions DE Sûreté Sûreté Pour Soudage a L’Arc Safety Methods of Reducing Emissions Mains Supply Master Table of Contents for ALL Sections Table of Contents Installation Section Installation Operating Temperature Range Storage Temperature Range Select Suitable Location StackingTilting Environmental Area Reconnect Procedure Input Connections Attachment Plug Installation 230V Input115V Input Engine Driven Generator Output Connections Output and GAS Connection for TIG Welding Figure A.1Work Cable Connection Remote Control Connection Shielding GAS Connection Invertec V205-T AC/DC Table of Contents Operation Section Safety Instructions OperationGeneral Description Welding Capability OPERATIONB-3 Rear Control Panel Figure B.1 Controls and Settings Figure B.2 Step Diagram Local/Remote push button Selects the welding TIG DC TIG AC SET UP Menu Indicator Parameter Default Output Limitations Welding Polarity Figure B.7 Steel TIG Welding Copper TIG WeldingTips for AC TIG Welding Filler Material AC TIG Welding Quick Start UP Protective GAS DC TIG Welding Quick Start UP Table of Contents Accessories Section Accessories Optional AccessoriesCompatible Equipment Cable Plugs Table of Contents Maintenance Section Maintenance Safety PrecautionsInput Filter Capacitor Discharge Procedure Routine Maintenance 3MAINTENANCE Figure D.1 Major Component Locations Invertec V205-T AC/DC 1TABLE of CONTENTS-THEORY of Operation Section E-1 Theory of Operation Input Board and BUS Board Main Igbt Inverter Board Figure E.3 Main Igbt Inverter Board Main Transformer Output Module Transistor BoardOutput Module and Clamping Board Superimposition Board CONTROL/DISPLAY Board High Frequency HF BoardOutput Filter Board Insulated Gate Bipolar Transistor Igbt Operation Passive Active 1TABLE of Contents Troubleshooting and Repair F-1 Troubleshooting and Repair HOW to USE Troubleshooting Guide PC Board Troubleshooting Procedures Electric Shock can kill Igbt Perform the Input Filter Board Igbt Inverter Board Test Secondary Output Board Assembly Test See the Output Filter Troubleshooting and Repair External Diagnostics Display Troubleshooting and Repair Internal Diagnostics Figure F.2 Internal Diagnostics LED Invertec V205-T AC/DC Test Description Materials Needed Input Filter Capacitor Discharge Procedure Capacitor Solder Resistor Pads Input Filter Board Test Procedure Input Filter Board TestInput Filter Board Input Filter Board Invertec V205-T AC/DC Main Igbt Inverter Board LOW Voltage Test Main Igbt Inverter Board LOW Voltage Test Figure F.6 Main Igbt Inverter Board Location Main Igbt Inverter Board LOW Voltage Test LED TP2 MF2 Figure F.7 Main Igbt Inverter Board Location CONTROL/DISPLAY Board Test CONTROL/DISPLAY Board Test Figure F.8 CONTROL/DISPLAY Board Location CN2 Figure F.9 CONTROL/DISPLAY Board Location CN1 Figure F.10 Plugs CN1, CN2 & CN7 BUS Board Test BUS Board Test Figure F.11 BUS Board Location Table F.5 Plug CN2 Test Points Table F.6 Plug CN3 Test PointsTable F.7 Plug CN4 Test Points Table F.8 Plug CN7 Test Points CN1 CN2 Main Inverter Board Power Factor Section Test Main Inverter Board Power Factor Section Test Table F.10 Voltage Checks with 115 VAC Applied to MachineTable F.11 Resistance Checks TP9 Gndpwr RL1 Invertec V205-T AC/DC Output Filter Board Test Output Filter Board Test Figure F.16 Output Filter Board Location Figure F.17 Output Filter Board Plug Location Figure F.18 Output Filter Board Plug CN1 Invertec V205-T AC/DC Secondary Output Board Assembly Test Secondary Output Board Assembly Test Figure F.19 Secondary Power Board Location OFF GA-SA Mode Positive Meter Negative Meter Expected Reading Probe Table F.14 Output Diode Resistance Check Main Inverter Board Welding Logic and Inverter Section Test Main Inverter Board Welding Logic and Inverter Section Test Table F.16 Feedback Voltage Signals Table F.18 LED Check in Stick ModeTable F.15 LED Function Table F.17 Voltage Checks with 115 VAC Applied to Machine Figure F.22 Main Board Inverter Section TP9 Ground Power Invertec V205-T AC/DC Input Filter Board Removal and Replacement Input Filter Board Removal and Replacement Figure F.24 Input Filter Board Location RV1 RV2 Invertec V205-T AC/DC Main Igbt Board Removal and Replacement Main Igbt Board Removal and Replacement Figure F.27 Main Igbt Board Location RV1 RV2 CN4 RV3 RV4 CN5 RV5 RV7 RV6 Invertec V205-T AC/DC CONTROL/DISPLAY Board Removal and Replacement CONTROL/DISPLAY Board Removal and Replacement Figure F.29 CONTROL/DISPLAY Board Location CN2 Invertec V205-T AC/DC Output Filter Board Removal and Replacement Removal and Replacement Figure F.32 Output Filter Board Location Phillips Head Screws CN1 Output Diodes Removal and Replacement Output Diodes Removal and Replacement To Replace ANY of the Output Diodes D1, D2, D3 or D4 Output Transistor Removal and Replacement Output Transistor Removal and Replacement Figure F.36 Output Transistor Location Plug CN1 5mm Allen Bolts Invertec V205-T AC/DC Table of Contents Diagram Section ELECTriCaL DiaGramS