Miller Electric M-15 - Manual (Page 26)

OM-1314 Page 22
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.