Hobart Welding Products 250 Welding Troubleshooting Table, Wire Drive/Gun Troubleshooting Table

5-8. Welding Troubleshooting Table

	Welding Trouble		Remedy
No weld output; wire does not feed.		Secure power cord plug in receptacle (see Section 3-13).
		Check and replace power switch if necessary.
		Check supplementary protectors CB1 and/or CB2, and reset if necessary (see Section 5-2).
		Replace building line fuse or reset circuit breaker if open (see Section 3-13).
		Secure gun trigger plug in receptacle or repair leads, or replace trigger switch (see Sections 3-5and/or
		Parts List).
		Thermostat open (overheating). Allow fan to run; the thermostat will close when the unit has cooled (see
		Section 3-2).
No weld output; wire feeds.		Connect work clamp to get good metal to metal contact.
		Replace contact tip (see Section 5-5).
Low weld output.		Connect unit to proper input voltage or check for low line voltage (see Section 3-13).
Low, high, or erratic wire speed.		Readjust front panel settings (see Section 4-1).
		Change to correct size drive roll (see Section 5-3).
		Readjust drive roll pressure (see Section 3-14).
		Replace inlet guide, contact tip, and/or liner if necessary (see Sections 5-3, 5-5and/or 5-6).

5-9. Wire Drive/Gun Troubleshooting Table

Wire Drive/Gun Trouble	Remedy
Electrode wire feeding stops during	Straighten gun cable and/or replace damaged parts (see Section 5-6).
welding.
	Adjust drive roll pressure (see Section 3-14).
	Readjust hub tension (see Section 3-9).
	Check supplementary protectors CB1 and/or CB2, and reset if necessary (see Section 5-2).
	Replace contact tip if blocked (see Section 5-5).
	Clean or replace wire inlet guide or liner if dirty or plugged (see Sections 5-3and/or 5-6).
	Replace drive roll if worn or slipping (see Section 5-3).
	Secure gun trigger plug in receptacle or repair leads, or replace trigger switch (see Section 3-5and/or
	see Parts List).
	Check and clear any restrictions at drive assembly and liner (see Section 5-6).
	Have nearest Factory Authorized Service Agent check drive motor.

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