Lincoln Electric IM481-B manual Trouble Cause What To Do

Trouble		Cause		What To Do
Output control not functioning on	1. Output Control switch in wrong		1.	Place switch in “Remote”.
“Remote” control.		position.
	2.	Faulty Output Control switch.	2.	Check and replace if found faulty.
	3.	Faulty remote control poten-	3.	Check and replace if found faulty.
		tiometer.
	4.	Leads or connections open in	4.	Check all leads and connections,
		control circuit.		internal or remote, for continuity;
				repair if necessary.
	5.	Faulty Control PC Board.	5.	Replace. See Procedure for
				Replacing PC Boards.
Poor arc striking with semiautomatic	1. Poor work connection.		1.	Work connection must be ade-
or automatic wire feeders.				quate for application.
	2.	Improper procedures.	2.	Adjust procedures for improved
				starting.
	3.	Defective Control PC Board.	3.	Replace. See Procedure for
				Replacing PC Boards.
Poor arc characteristics.	1. Defective Control PC Board.		1.	Replace. See Procedure for
				Replacing PC Boards.
	2.	Capacitor(s) in output circuit	2.	Replace entire bank of capaci-
		failed. A failure is indicated if the		tors. Do not replace individual
		small vent plug on top of a		capacitors.
		capacitor is raised or blown out.
				WARNING: The liquid electrolyte
				in these capacitors is toxic. Avoid
				contact with any portion of your
				body. Clean up vented electrolyte
				using rubber gloves and a water
				dampened cloth. Any electrolyte
				which gets on skin, clean with
				soap and water.

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