Hobart Welding Products OM-198 683C manual Troubleshooting, Trouble Remedy

4-9. Troubleshooting

Trouble	Remedy
No weld output; wire does not feed.	Be sure line disconnect switch is On (see Section 2-13).
	Replace building line fuse or reset circuit breaker if open (see Section 2-13).
	Reset circuit breaker CB1 (see Section 4-2).
	Secure gun trigger connections (see Section 2-6).
	Have Factory Authorized Service Agent check Power switch.
	Have Factory Authorized Service Agent check all board connections and main control board.
	H – – message appears on voltmeter display to indicate thermostat TP1 is open and unit is in an over-
	heated condition (see Section 3-2).
No weld output; wire feeds.	Thermostat TP1 open (overheating). Allow fan to run; the thermostat will close when the unit has cooled
	(see Section 2-2).
	Connect work clamp to get good metal to metal contact.
	Replace contact tip (see Section 4-4).
	An overload condition occurred. Release gun trigger (see Section 4-3).
	Have Factory Authorized Service Agent check main control board and main rectifier.
Low weld output.	Connect unit to proper input voltage or check for low line voltage (see Section 2-13).
	Check input voltage jumper links and correct position if necessary (see Section 2-11).
	Have Factory Authorized Service Agent check main control board.
Fan motor does not run.	Have Factory Authorized Service Agent check fan-on-demand circuit.
Low, high, or erratic wire speed.	Readjust front panel settings (see Section 3-1).
	Change to correct size drive rolls (see Section 4-5).
	Readjust drive roll pressure (see Section 2-14).
	Replace inlet guide, contact tip, and/or liner if necessary (see Sections 4-4, and 4-7).
	Check position of input jumper links (see Section 2-11).
	Have Factory Authorized Service Agent check main control board.
No wire feed.	Reset circuit breaker CB1 (see Section 4-2).
	Turn Wire Speed control to higher setting (see Section 3-1).
	Clear obstruction in gun contact tip or liner (see Sections 4-4, and 4-7).
	Readjust drive roll pressure (see Section 2-14).
	Change to correct size drive rolls (see Section 4-5).
	Rethread welding wire (see Section 2-14).
	Check gun trigger and leads. Repair or replace gun if necessary.
	Have Factory Authorized Service Agent check main control board.
	H – – message appears on voltmeter display to indicate thermostat TP1 is open and unit is in an over-
	heated condition (see Section 3-2).

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