Lincoln Electric LN-25X Operator's Manual page 34

LN-25X™
PROBLEM
Err 81 Motor overload, long
term
Err 82 Motor overload, short
term
Output Problems
The feeder does power up -
no voltage, no cold feed.
The wire feeder power up
but there is no output when
the trigger is pulled. The
shielding gas is flowing and
the drive rolls turn
No shielding gas.
Inconsistent wire feeding or
wire not feeding but drive
rolls turning.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized
Field Service Facility for technical troubleshooting assistance before you proceed.
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE CAUSE
The wire drive motor has
overheated.
TThe wire drive motor current
draw has exceeded limits,
usually because the motor is in
a locked rotor state.
1. The work sense lead is
disconnected or is a poor
electrical connection.
(Across the arc models)
2. The power source is OFF.
1. The contactor coil
connections are loose.
2. The contactor has failed.
1. The gas supply is OFF or
empty.
2. The gas hose is cut or
crushed
3. The flow meter valve is
closed.
4. Dirt or debris is in the
solenoid.
5. There is a loose solenoid
connection.
6. The solenoid has failed.
1. The gun cable is kinked
and/or twisted
2. The wire is jammed in the
gun and cable.
3. The gun liner is dirty or worn.
4. The electrode is rusty or dirty.
5. The contact tip is partially
melted or has spatter.
6. Improper gun liner, tip, drive
RECOMMENDED COURSE OF ACTION
1. Check that the electrode slides easily through the gun and cable.
2. Remove tight bends from the gun and cable.
3. Check that the spindle brake is not too tight.
4. Verify a high quality electrode is being used.
5. Wait for the error to reset and the motor to cool (approximately 1
minute).
1. Check that motor can turn freely when idle arm is open.
2. Verify that the gears are free of debris and dirt.
1. Connect the work sense lead to the work in a location free of dirt,
rust and paint.
2. Turn ON the power source.
1. Verify the contactor coil connections.
2. Replace the contactor.
1. Verify the gas supply is ON and flowing.
2. Route the gas hose so it avoids sharp corners and make sure nothing
is on top of it. Repair or replace damaged hoses.
3. Open the flow meter valve.
4. Apply filtered shop at 80psi to the solenoid to remove dirt.
5. Remove the cover and check that all connections are in good
condition.
1. Keep the gun cable as straight as possible. Avoid sharp corners or
bends in the cable.
2. Remove the gun from the wire feeder and pull the jammed wire out
of the gun and cable.
3. Blow dirt out of the liner with low pressure (40psi or less). Replace
the liner if worn.
CAUTION
E-2
TROUBLESHOOTING