Grounding Lead Protector

B-11	OPERATION	B-11

The frame of the Synergic 7 wire feeder is grounded to the frame of the power source by a lead in the con- trol cable. An overload protector prevents welding current from damaging this lead if the electrode circuit touches the wire feeder frame while the electrode is electrically hot.

If such a grounding lead fault occurs, the wire feeder display will show "GLP", and the trigger circuit will be disabled. To reset the circuit, release the trigger, make sure that the electrode is not touching the wire feeder frame, and then either press any key on the keypad or close the trigger. When the GLP circuit is reset, the "GLP" display is removed and the wire feed- er is returned to normal operating mode.

Explanation of Prompting and

Error Messages

Display	Prompt or Error
HI	Indicates arc voltage is above 80V DC.

---Indicates selected Run-In speed will be the same as the weld speed. To enter a different Run-In speed simply press the increase arrow key with Run-In selected.

HXX	Indicates wire feed overload. XX indicates
	time remaining in seconds before unit resets
	automatically. See sections on Routine
	Maintenance, Periodic Maintenance, and
	Troubleshooting Guide Problem 24.
EP	Indicates problem in EPROM assembly. See
	Troubleshooting Guide Problem 24.
uP	Indicates problem in microprocessor RAM.
	See Troubleshooting Guide Problem 24.
EXX	Indicates various system problems. XX will
	be a number from 01 to 10. Turn off power to
	feeder. Wait 5 seconds. Turn power back on.
	If error persists, see Troubleshooting Guide
	Problem 24. If error does not reoccur, be
	sure to check all wire feed speed, accelera-
	tion, and timer settings before you proceed.
Er	EEPROM error. Usually occurs at power-up.
	Indicates one or more of the recalled settings
	is out of acceptable limits. Press any key to
	return to normal operation. Be sure to check
	all wire feed speed, acceleration, and timer
	settings before you proceed.
GLP	Indicates that the Grounding Lead Protector
	circuit was activated due to excessive current
	flow into the wire feeder frame. When the
	Grounding Lead Protector circuit is activated
	the wire feeder is disabled, i.e. the trigger out-
	put to the power source is opened up, the
	motor is stopped, and the gas solenoid is
	turned off. To resume normal operation,
	release the trigger, make sure that the elec-
	trode is not touching the wire feeder frame,
	and then either press a key on the keypad or
	close the trigger. See Problem 24 in the
	Troubleshooting Guide.

SYNERGIC 7 & 7H

Lincoln Electric IM557 manual Grounding Lead Protector, Explanation of Prompting Error Messages

Models: IM557

OPERATION