Hobart Welding Products OM-947 212 149D manual Troubleshooting Table, Trouble Remedy, Does not run

6-8. Troubleshooting Table

	Trouble		Remedy
No weld output; wire does not feed; fan		Secure power cord plug in receptacle (see Section 4-6).
does not run.
		Replace building line fuse or reset circuit breaker if open.
		Place Power switch in On position (see Section 5-1).
		Reset welding power source supplementary protector if open.
No weld output; wire does not feed; fan		Thermostat TP1 open (overheating). Allow fan to run with gun trigger switch off; thermostat closes when
motor continues to run.		unit has cooled (see Section 3-2).
		Be sure that Voltage switch is not set between ranges (see Section 5-1).
		Disassemble torch handle and check trigger switch lead connections, tighten or reconnect any loose
		connections.
No weld output; wire feeds.		Connect work clamp to get good metal to metal contact.
		Check cable connection at work clamp and tighten hardware, if necessary (see Section 4-1).
		Replace contact tip (see Section 6-5).
		Check for proper polarity connections (see Section 4-3).
Low weld output.		Connect unit to proper input voltage or check for low line voltage.
		Place voltage switch in desired position (see Section 5-1).
		If using an extension cord, check that wire size and length is the proper size for power rating of welding
		power source (see Section 3-1).
Electrode wire feeding stops during		Straighten gun cable and/or replace damaged parts.
welding.
		Adjust drive roll pressure (see Section 4-8).
		Change to proper drive roll groove (see Section 6-4).
		Readjust hub tension (see Section 4-5).
		Replace contact tip if blocked (see Section 6-5).
		Clean or replace wire inlet guide or liner if dirty or plugged (see Section 6-4).
		Replace drive roll or pressure bearing if worn or slipping (see Section 6-4).
		Check and clear any restrictions at drive assembly and liner (see Section 6-6).
		Release gun trigger and allow gun and motor protection circuitry to reset.
		Have nearest Factory Authorized Service Agent check drive motor.

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