Lincoln Electric 7FH manual Hxx

PROBLEMS

PROBLEM	POSSIBLE CAUSE	WHAT TO DO
20. Wire feed speed is consistent	a.Defective gearbox ratio sensing	a. Remove control board plug from
and adjustable, but operates at the	or control board.	J5. Check that if you have a high
wrong speed.		speed Wire Feed Unit that you have
		continuity between plug P5 pins 4
		and 6. Likewise if you have a
		standard speed Wire Feed Unit you
		should not have continuity between
		P5 pins 4 and 6. If the continuity test
		fails, refer to wiring diagram and
		correct the problem in the J13 to J5
		jumper sensing system. Otherwise
		replace control board.
21. Display shows any of the
following:
HI	a. Voltmeter function is selected	a. Normal operation. Voltmeter only
	and arc voltage is > 80V DC.	reads 0-80V DC.
- - -	a. Run-In speed is selected but is	a. Run-In speed is now = weld
	disabled.	speed. To re-enable Run-In speed
		simply press the increase arrow key.
HXX	a. See problem 5 or see section on	a. XX indicates time in seconds
	Safety Precautions.	before unit will automatically reset.
Er	a. EEPROM error.	a. Parameter recalled at power-up
		was out of range. Press any key
		to reset. Check all settings before
		proceeding to weld. If this
		condition persists then replace
		control PC board. (See Procedure
		for Replacing PC boards.)
EXX	a. Where XX is a number from	a. Turn off power to feeder. Wait 5
	1-10. System error.	seconds. Turn power back on. If
		EXX is displayed again then
		replace control PC board. (See
		Procedure for Replacing PC
		boards.)
EP	a. EPROM checksum error.	a. Turn off power to feeder. Wait 5
		seconds. Turn power back on. If
		EP is displayed again then replace
		EPROM assembly. If problem still
		persists then replace Control PC
		board . (See Procedure for
		Replacing PC boards.)
uP	a. Microprocessor RAM error.	a. Turn off power to feeder. Wait 5
		seconds. Turn power back on. If
		uP is displayed again, then
		replace control PC board. (See
		Procedure for Replacing PC
		boards.)

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