Miller Electric 250 manual Troubleshooting Tables, Welding, Generator Power, Trouble Remedy

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

9-6. Troubleshooting Tables

A. Welding

	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 9-5).
		Have Factory Authorized Service Agent check brushes, slip rings, integrated rectifiers SR2 and SR3,
		and main rectifier SR1.
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 9-5).
		Check plug PLG6 connection.
		Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifiers SR2, SR3.
Low weld output.		Check control settings.
		Check fuse F1, and replace if open (see Section 9-5).
		Check engine speed, and adjust if necessary (see Section 9-4).
		Service air cleaner (see Section 8-2)
		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 9-4).
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 9-4).
		Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifiers SR2, SR3.

B. Generator Power

Trouble	Remedy
No or low generator power output at ac	Reset supplementary protectors (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 9-5).
	Check engine ignition wiring connections.
	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 9-5).
	Check engine ignition wiring connections.
	Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifiers SR2 and
	SR3.

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