Miller Electric 172 M-10 Gun manual Troubleshooting Table, Trouble Remedy

5-8. Troubleshooting Table

	Trouble		Remedy
No weld output; wire does not feed; fan		Secure power cord plug in receptacle (see Section 3-5).
does not run.
		Replace building line fuse or reset circuit breaker if open (see Section 3-5).
		Secure gun trigger plug in receptacle (see Section 3-2).
		Place Power switch in On position (see Section 4-1).
No weld output; wire does not feed; fan		Check Voltage control knob. Switch must “click” into detent position 1, 2, 3, or 4 for proper contact (see
motor continues to run.		Section 4-1).
		Thermostat TP1 open (overheating). Allow fan to run; thermostat closes when unit has cooled (see
		Section 2-3).
		Check and replace motor fuse F1, if necessary (see Section 5-2).
		Have Factory Authorized Service Agent check all board connections and shut down PC1 board.
No weld output; wire feeds.		Connect work clamp to get good metal to metal contact.
		Replace contact tip (see Section 5-5).
		Check for proper connections at polarity changeover board (see Section 3-2).
Low weld output.		Connect unit to proper input voltage or check for low line voltage.
		Place voltage switch in desired position (see Section 4-1).
Electrode wire feeding stops during		Straighten gun cable and/or replace damaged parts (see Section 5-6).
welding.
		Adjust drive roll pressure (see Section 3-7).
		Change to proper drive roll groove (see Section 3-7).
		Readjust hub tension (see Section 3-6).
		Replace contact tip if blocked (see Section 5-5).
		Clean or replace wire inlet guide or liner if dirty or plugged (see Section 5-4 and/or 5-6).
		Replace drive roll or pressure bearing if worn or slipping (see Section 5-4).
		Secure gun trigger plug in receptacle or repair leads, or replace trigger switch (see Section 3-2).
		Check motor fuse F1, and replace if necessary (see Section 5-2).
		Check and clear any restrictions at drive assembly and liner (see Section 5-4 and/or 5-6).
		Have nearest Factory Authorized Service Agent check drive motor.

OM-1318 Page 22