Lincoln Electric SVM161-A service manual Igbt Inverter Board Test

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F-6	TROUBLESHOOTING AND REPAIR					F-6
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS			POSSIBLE AREAS OF		RECOMMENDED
(SYMPTOMS)			MISADJUSTMENT(S)		COURSE OF ACTION
			FUNCTION PROBLEMS
Error code “E20”, “E24”, or “E25” is		1. Any one of these codes indicates		1.	The Control/Display	Board is
flashing on the digital display.			a memory error.		faulty. Replace.
The machine functions normally		1. Check for obstructions that could		1. Check the fan fuse F3 located on
except the cooling fan does not			prevent the fan from turning.		the Bus Board Replace if faulty.
operate.
				2. Perform the Bus Board Test.
				3. The Main IGBT Inverter Board
					May be Faulty. Perform the
					Main IGBT Inverter Board Low
					Voltage Supply Test.
No High Frequency when the torch		1.	Make sure the HF is in the active	1.	Check fuse F2 on the Bus Board.
trigger is pulled and the machine is			mode. See the Set-up Menu in	2.	Check for 385VDC	at Test
in the TIG mode.			this manual.		Points 9 and 20. See the Main
					IGBT Inverter Board Test.
				3.	Perform the Control/Display
					Board Test.
				4.	The HF board may be faulty.
					Replace.
Error code “E14” is flashing of the		1.	This is an indication that the out-	1.	Check for excessive	welding
digital display			put inductance is too high.		cable length.
				2.	The Main IGBT Inverter Board
					may be faulty.
				3.	The Superimposition Board may
					be faulty.
				4.	The Control/Display 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™