Miller Electric Maxstar 200 STR Troubleshooting, Trouble Remedy, Shield weld zone from drafts

6-4. Troubleshooting

	Trouble	Remedy
No weld output; unit completely		Place line disconnect switch in On position (see Section 4-10).
inoperative.
		Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 4-10).
		Check for proper input power connections (see Section 4-10).
No weld output; Output LED on.		Input voltage outside acceptable range of variation (see Section 4-9).
		See Section 6-3, Troubleshooting Help Aids.
No weld output; Overtemp LED on.		Unit overheated. Allow unit to cool with fan On (see Sections 4-3and 6-3).
Erratic or improper weld output.		Use proper size and type of weld cable (see Section 4-5).
		Clean and tighten all weld connections (see Section 4-5).
Fan not operating.		Check for and remove anything blocking fan movement.
		Have Factory Authorized Service Agent check fan motor.
Wandering arc		Use proper size tungsten (see Section 8).
		Use properly prepared tungsten (see Section 8).
		Reduce gas flow rate (see Section 4-7).
Tungsten electrode oxidizing and not re-		Shield weld zone from drafts.
maining bright after conclusion of weld.
		Allow adequate postflow time to shield tungsten while it cools, after welding stops.
		Check and tighten all gas fittings (see Section 4-7).
		Water in torch. Refer to torch manual.

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