Lincoln Electric IM539 Synergic 7F and 7FH - Manual (Page 35)

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PROBLEM
20. Wire feed speed is consistent
and adjustable, but operates at the
wrong speed.
21. Display shows any of the
following:
HI
- - -
HXX
Er
EXX
EP
uP
POSSIBLE CAUSE
a.Defective gearbox ratio sensing
or control board.
a. Voltmeter function is selected
and arc voltage is > 80V DC.
a. Run-In speed is selected but is
disabled.
a. See problem 5 or see section on
Safety Precautions.
a. EEPROM error.
a. Where XX is a number from
1-10. System error.
a. EPROM checksum error.
a. Microprocessor RAM error.
WHAT TO DO
a. Remove control board plug from
J5. Check that if you have a high
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.
a. Normal operation. Voltmeter only
reads 0-80V DC.
a. Run-In speed is now = weld
speed. To re-enable Run-In speed
simply press the increase arrow key.
a. XX indicates time in seconds
before unit will automatically reset.
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.)
a. Turn off power to feeder. Wait 5
seconds. Turn power back on. If
EXX is displayed again then
replace control PC board. (See
Procedure for Replacing PC
boards.)
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.)
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.)
PROBLEMS