Lincoln Electric IM628 manual Troubleshooting, Symptom Problem Solution

D-1	TROUBLESHOOTING	D-1
	Observe all Safety Guidelines detailed throughout this manual

SYMPTOM

PROBLEM

SOLUTION

Connected extraction fan does not	Welding light insufficient to be	Position the hood closer to the arc. Check
start automatically.	detected by sensor.	the functioning of the sensor using a striker
		or bright light (or arc flash).
	Lens caps extremely dirty.	Clean or replace the lens caps.
	Automatic Start/Stop Arc Sensor	If the connected extraction system oper-
	damaged or defective.	ates correctly with the hood-mounted I/0
		switch, check the wiring of the Sensor into
		the hood-mounted switch. Replace the
		Sensor if necessary.
	Motor overload protection activated.	Check the overload; if tripped, let the
	(Starter/Overload in Mobiflex 200-M,	machine cool down for a few minutes and
	Thermal Relay with SF2400 Fan)	reset the overload.
	Fuse blown.	Check and replace if required.
	Connecting cable in arm damaged or	Check and replace if required.
	defective.
	Hood-mounted switch or Control	Check and tighten or replace if required.
	Board loose or defective.
	Transformer (in Control Box or	Check and replace if required.
	Mobiflex Control Panel) defective.
	Contactor (in Control Box or Mobiflex	Check and replace if required.
	Control Panel) defective.
	Wiring or connections loose.	Check all connections and tighten or repair
		if necessary:
		• At Control Board (under hood-mounted
		switch)
		• In Control Box (if using SF2400 Fan
		with K1669-2 Lamp Kit)
		• In Control Panel (in Mobiflex 200-M)

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.

AUTOMATIC START/STOP ARC SENSOR