Miller Electric SuitCase 8VS manual Troubleshooting, Trouble Remedy

6-3. Troubleshooting

	Trouble	Remedy
Wire does not feed; open-circuit voltage		Check circuit breaker CB1. Reset CB1.
available.
		Unit overheated. Allow unit to cool.
		Check sensing lead connection.
		Check gun trigger plug connection.
		Check gun trigger. See gun Owner’s Manual.
Wire feeds erratically.		Readjust hub tension.
		Readjust drive roll pressure.
		Clean or replace dirty or worn drive roll (see Section 4-4).
		Remove weld spatter around nozzle opening.
		Replace contact tip or liner. See gun Owner’s Manual.
Wire feeds as soon as power is applied.		Check gun trigger. See gun Owner’s Manual.
Wire feeds when Jog switch is pressed		Check gun trigger connection at wire feeder. Check gun trigger leads and trigger switch. See gun Owner’s
but not when gun trigger is pressed.		Manual.
Wire stubbing on low end using a con-		Make sure CC/CV switch is in CC position (see Section 5-1).
stant current power source.
		Increase output setting of power source.
Gas does not flow or does not stop flow-		Check gas valve.
ing; wire feeds.
		Have Factory Authorized Service Agent check control board PC1.
Wire remains energized after trigger is		Check contactor W1 to see if contacts are frozen closed.
released.

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