Miller Electric M-15 manual Troubleshooting, Welding Trouble Remedy

4-9. Troubleshooting

Welding Trouble	Remedy
No weld output; wire does not feed.	Secure power cord plug in receptacle (see Section 2-8).
	Check and replace power switch if necessary.
	Check fuse F1, and replace if necessary (see Section 4-2).
	Replace building line fuse or reset circuit breaker if open (see Section 2-8).
	Secure gun trigger plug in receptacle or repair leads, or replace trigger switch (see Section 2-6 and/or
	4-7).
	Thermostat TP1 open (overheating). Allow fan to run; the thermostat will close when the unit has cooled
	(see Section 2-3).
No weld output; wire feeds.	Connect work clamp to get good metal to metal contact.
	Replace contact tip (see Section 4-4).
Low weld output.	Connect unit to proper input voltage or check for low line voltage (see Section 2-8).
Low, high, or erratic wire speed.	Readjust front panel settings (see Section 3-1).
	Change to correct groove in drive roll (see Section 2-10).
	Readjust drive roll pressure (see Section 2-10).
	Replace inlet guide, contact tip, and/or liner if necessary (see Sections 4-8, 4-4 and/or 4-6).

Wire Drive/Gun Trouble	Remedy
Electrode wire feeding stops during	Straighten gun cable and/or replace damaged parts (see Section 4-6).
welding.
	Adjust drive roll pressure (see Section 2-10).
	Readjust hub tension (see Section 2-9).
	Replace contact tip if blocked (see Section 4-4).
	Clean or replace wire inlet guide or liner if dirty or plugged (see Section 4-8, and Section 4-6).
	Replace drive roll if worn or slipping (see Section 2-10).
	Secure gun trigger plug in receptacle or repair leads, or replace trigger switch (see Section 2-6 and/or
	4-7).
	Check and clear any restrictions at drive assembly and liner (see Section 4-8, and Section 4-6).
	Have nearest Factory Authorized Service Agent check drive motor.
	Check relay CR1, and replace if necessary.

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