F-12
TROUBLESHOOTING AND REPAIR
F-12
LN-10
Observe all Safety Guidelines detailed throughout this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
The knobs do not control the com-
plete range of wire feed speed or
voltage.
An “Er” message is displayed when
the LN-10 is powered up.
A “GLP” message is displayed.
1. Limits may be set for wire feed
speed or voltage. See maxi-
mum and minimum limit set-
ting modes.
2. DIP switch S1 may be incorrect-
ly set for the wire drive or gear
ratio. See Wire Drive Head
Selection.
3. Make sure that the DIP switch
settings match the power
source being used. See
Welding Power Source
Selection.
1. This indicates an EEPROM
error has been detected. Check
all the settings to make sure
they are within the acceptable
ranges. If the “Er” message is
still displayed remove the input
power. While pressing the Timer
and Control keys, turn on the
input power. The message “Ln”
should be displayed. Leave on
for 5 seconds. Remove the
input power. Note: All the set-
tings will be removed.
1. The Ground Lead Protector cir-
cuit has activated due to exces-
sive current flow in the wire
feeder frame. This can be
caused be the electrode coming
in contact with the wire feeder
frame or poor connections in the
work cable circuit. The wire
feeder will be disabled. Remedy
the “grounding” problem and
resume normal operations by
releasing the gun trigger and
then closing the gun trigger.
1. Perform the Encoder Board
Test.
2. The control board may be
faulty.
1. The control board may be
faulty.
1. The GLP reed switch may be
faulty. This switch is normally
open and should only close
when current is flowing through
the green lead and wire feeder
frame. It may be stuck closed.
See the Wiring Diagram.
2. The control board may be
faulty.
FUNCTION PROBLEMS (Continued)
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric
Service Department for technical troubleshooting assistance before you proceed. Call 1-800-833-9353.
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