Miller Electric Trailblazer DC, 301 G, DC Generator Power Troubleshooting, Engine Troubleshooting

Trouble	Remedy
Lack of high frequency; difficulty in	Use proper size tungsten for welding amperage.
establishing Gas Tungsten Arc Weld-
ing arc.
	Reduce leakage of high frequency from torch or work cable (check grounding, remove excessive
	coils from weld cables, use shorter weld cables, etc.).
	Check cables and torch for cracked or deteriorated insulation or bad connections. Repair or replace
	necessary parts.
Wandering arc − poor control of arc	Reduce gas flow rate.
direction.
	Select proper size tungsten. Properly prepare tungsten.
Tungsten electrode oxidizing and not	Shield weld zone from drafts.
remaining bright after conclusion of
weld.
	Increase postflow time.
	Check and tighten all gas fittings.
	Properly prepare tungsten.

10-2. Generator Power Troubleshooting

	Trouble		Remedy
No power output.		Reset circuit breakers CB1, CB3 and/or CB4 (see Section 7-1).
		Check fuse F1, and replace if necessary (see Section 8-5or 9-7).
		Have Factory Authorized Service Agent check brushes, slip rings, integrated rectifier SR2, and circuit
		boards PC1 and PC2.
Low power output.		Check and clean air cleaner as necessary.
		Check engine speed, and adjust if necessary (see Section 8-7or 9-6).
		See engine manual.
High power output.		Check engine speed, and adjust if necessary (see Section 8-7or 9-6).
Erratic power output.		Have Factory Authorized Service Agent check brushes, slip rings, and field current control board PC2.
		Check receptacle wiring and connections.
		Check governor according to engine manual.

10-3. Engine Troubleshooting

	Trouble		Remedy
Engine will not crank.		Check fuse F6, and replace if open (see Section 8-5or 9-7).
		Check battery voltage.
		Check battery connections and tighten if necessary.
		Check plug PLG5 and plug PLG8 connections.
		Have Factory Authorized Service Agent check Engine Control switch S2.

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