Miller Electric 301 G manual Troubleshooting, Welding, Trouble Remedy

8-7. Troubleshooting

A. Welding

Trouble	Remedy
No weld output.	Check control settings.
	Check weld connections.
	Disconnect equipment from generator power receptacles during start-up.
	Place V/A Adjust switch in Panel position, or move switch to Remote position and connect remote
	control to Remote receptacle RC4 (see Sections 5-8and 6-1).
	Check and secure connections to Remote receptacle RC4 (see Sections 5-8).
	Check fuse F1 on circuit board PC7, and replace if necessary (see Section 8-6).
	Have Factory Authorized Service Agent check brushes, slip rings, and circuit boards PC1 and PC2.
Low weld output.	Check weld control settings.
	Change position of Engine Control switch and Speed Control switch to achieve desired engine speed.
	Place V/A Adjust switch in Panel position, or move switch to Remote position and connect remote
	control to Remote receptacle RC4 (see Sections 5-8and 6-1).
	Check and clean air cleaner as necessary (see Section 8-4).
	Have Factory Authorized Service Agent check brushes, slip rings, and circuit boards PC1 and PC2.
	See engine manual.
High weld output.	Check control settings.
	Check for obstructed movement of solenoid linkage.
	Have Factory Authorized Service Agent check circuit boards PC1, PC2, and PC7.
Weld output cannot be adjusted.	Check position of V/A Adjust switch (see Section 6-1).
	Have Factory Authorized Service Agent check field current control board PC2.
Erratic weld output.	Check control settings.
	Clean and tighten connections both inside and outside unit.
	Be sure connection to work piece is clean and tight.
	Remove excessive coils from weld cables.
	Use dry, properly stored electrodes.
	Have Factory Authorized Service Agent check brushes, slip rings, and circuit boards PC1 and PC2.
No remote fine amperage control.	Place V/A Adjust switch in Remote position (see Section 6-1).
	Check and tighten connections to Remote receptacle RC4 (see Section 5-8).
No 24 volt ac output at Remote	Reset circuit breaker CB5 (see Section 8-6).
receptacle RC4.
No 115 volt ac output at Remote	Check fuse F2, and replace if open (see Section 8-6).
receptacle RC4.

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