Lincoln Electric LN-25 SVM179-B Service Manual page 48

F-4
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
Fault Code
Thermal LED Lit
Motor overloaded, long term
(Err 81 on Digital Models)
Thermal LED Lit
Motor overloaded, short term
(Err 82 on Digital Models)
The feeder does not power up - no
display (Digital Models) - no cold
feed.
NOTE: Both LED's should flash
briefly when power
applied.
The wire feeder powers up but
there is no welder output when the
gun trigger is pulled. The shielding
gas flows and the drive rolls turn.
(Across the arc models)
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 1-888-935-3877.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
Description
1. The wire drive motor has over-
heated.
1. The wire drive motor is in a
locked state causing the motor
to exceed it's maximum amper-
age draw.
OUTPUT PROBLEMS
1 The work sense lead has an
open or
(across the arc model).
2. The power source is off.
is
3. The circuit breaker for the feed-
er on the power source may
have tripped.
model).
1. The contactor coil connections
are loose.
2. The contactor has failed.
CAUTION
LN-25™ PRO
1. Remove any bends in the gun.
2. Check to see if the wire moves
smoothly through the gun and
cable.
3. Check the tightness of the spin-
dle brake.
4. Wait for the motor to cool and
the error to reset.
1. Verify that the motor can move
freely when the pressure arm is
released.
2. Verify that the drive system is
free of dirt and debris.
3. Perform the MOTOR OVER-
LOAD TEST.
1. Connect the work sense lead to
poor connection the work in a location free of dirt
or paint.
2. Turn on the power source.
3. Reset the circuit breaker.
(Control cable
1. Verify the connections.
2. Check for opens in the leads.
3. Perform
TEST, replace if necessary.
RECOMMENDED
COURSE OF ACTION
Possible Adjustment
the CONTACTOR
F-4