Generator Power Troubleshooting; Engine Troubleshooting - Miller Trailblazer 301 D Owner's Manual

Trouble
Lack of high frequency; difficulty in
establishing Gas Tungsten Arc Weld-
ing arc.
Wandering arc − poor control of arc
direction.
Tungsten electrode oxidizing and not
remaining bright after conclusion of
weld.

9-2. Generator Power Troubleshooting

Trouble
No generator power output at ac
receptacles.
Low generator power output at ac
receptacles.
High power output at ac receptacles.
Erratic power output at ac receptacles.

9-3. Engine Troubleshooting

Trouble
Engine does not crank.
OM-4410 Page 42
Use proper size tungsten for welding amperage.
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.
Reduce gas flow rate.
Select proper size tungsten. Properly prepare tungsten.
Shield weld zone from drafts.
Increase postflow time.
Check and tighten all gas fittings.
Properly prepare tungsten.
Reset circuit breakers CB1, CB3 and/or CB4 (see Section 7-1).
Check fuse F1, and replace if necessary (see Section 8-7).
Check receptacle wiring and connections.
Have Factory Authorized Service Agent check brushes, slip rings, integrated rectifier SR2, and circuit
boards PC1 and PC2.
Check air cleaner, and clean as necessary (see Section 8-3).
Check engine speed, and adjust if necessary (see Section 8-6).
See engine manual.
Check engine speed, and adjust if necessary (see Section 8-6).
Check receptacle wiring and connections.
Check governor according to engine manual.
Have Factory Authorized Service Agent check brushes, slip rings, and field current control board
PC2.
Check fuse F2, and replace if open (see Section 8-7).
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.
Remedy
Remedy
Remedy