Lincoln Electric R350 manual Troubleshooting

E-7	TROUBLESHOOTING	E-7
	Observe all Safety Guidelines detailed throughout this manual

PROBLEMS

(SYMPTOMS)

POSSIBLE

CAUSE

RECOMMENDED

COURSE OF ACTION

Weld and Arc Quality Problems (Continued)

Wire burns back to tip at the end of	1.	Burnback Time	1.	Reduce burnback time and/or
the weld.				work point.
Machine output shuts down during a	1.	Secondary current limit has been	1.	Adjust procedure or reduce load
weld.		exceeded, and the machine shuts		to lower current draw from the
		down to protect itself.		machine.
	2.	System Fault	2.	A non-recoverable fault will inter-
				rupt welding. This condition will
				also result in a status light blink-
				ing. See the Status Light section
				for more information.
Machine wonʼt produce full output.	1.	Input voltage may be too low, lim-	1.	Make certain that the input voltage
		iting output capability of the power		is proper, according to the Rating
		source.		Plate located on the rear of the
				machine.
	2.	Single Phase Operation	2. Maximum output is reduced if
			there is a loss of phase on 460 or
			575 VAC. Check for the presence of
			all phases.
	3.	Machine calibration.	3.	Calibrate secondary current and
				voltage.
Excessively long and erratic arc.	1.	Wire feed problem.	1.	Check for feeding problems. Make
				sure proper gear ratio has been
				selected.
	2.	Loss of, or improper Shielding	2.	Verify gas flow and type are cor-
		Gas		rect
	3.	Machine calibration.	3.	Calibrate secondary current and
				voltage.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

POWER WAVE® R350