Miller Electric Bobcat 250 manual Welding Troubleshooting, Generator Power Troubleshooting

. A complete Parts List is available at www.MillerWelds.com

SECTION 10 − TROUBLESHOOTING

10-1. Welding Troubleshooting

	Trouble		Remedy
Low or no weld output; generator pow-		Check control settings.
er output okay at ac receptacles.
		Check weld connections.
		Check fuse F1, and replace if open (see Section 8-4or 9-6).
		Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifiers SR2 and
		SR3.
No weld output or generator power out-		Be sure all equipment is disconnected from receptacles when starting unit.
put at ac receptacles.
		Check fuses F1 and F2, and replace if open (see Section 8-4or 9-6).
		Check plug PLG6 connection.
		Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifiers SR2, SR3.
Low weld output.		Check fuse F1, and replace if open (see Section 8-4or 9-6).
		Check control settings.
		Check engine speed, and adjust if necessary (see Section 8-6or 9-5).
		Service air cleaner according to engine manual.
		Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifiers SR2, SR3.
High weld output.		Check control settings.
		Check engine speed, and adjust if necessary (see Section 8-6or 9-5).
Erratic weld output.		Check control settings.
		Tighten and clean connections to electrode and workpiece.
		Use dry, properly-stored electrodes for Stick and TIG welding.
		Remove excessive coils from weld cables.
		Clean and tighten connections both inside and outside welding generator.
		Check engine speed, and adjust if necessary (see Section 8-6or 9-5).
		Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifiers SR2, SR3.

10-2. Generator Power Troubleshooting

	Trouble		Remedy
No or low generator power output at ac		Reset supplementary protector(s) (see Section 7-1).
receptacles; weld output okay.
		Press optional GFCI receptacle Reset button (see Section 7-1).
		Check fuse F2, and replace if open (see Section 8-4or 9-6).
		Check plug PLG6 connection.
		Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifier SR3.
No generator power or weld output.		Be sure all equipment is disconnected from receptacles when starting unit.
		Check fuses F1 and F2, and replace if open (see Section 8-4or 9-6).
		Check plug PLG6 connection.
		Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifiers SR2 and
		SR3.

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