Lincoln Electric LN-25 SVM179-B Service Manual page 22

B-8
3. 5-PIN GUN TRIGGER CONNECTOR
(See Figure B.1)
4. WORK SENSE LEAD
(See Figure B.1)
Must be connected for the drive motor to operate.
5. THERMAL LED, MOTOR OVERLOAD
(See Figure B.1)
The thermal light illuminates (yellow)
when the wire drive motor draws too
much current. If the thermal light illumi-
nates, the wire drive will automatically
shutdown for up to 30 seconds to allow
the motor to cool. To start welding
again, release the gun trigger, inspect the gun cable,
liner (and conduit). Clean and make repairs as nec-
essary. Start welding again when the problem has
been safely resolved.
For best results, keep the gun cable and conduit as
straight as possible. Perform regular maintenance
and cleaning on the gun liner, conduit and gun.
Always use quality electrode, such as L-50 or L-56
from Lincoln Electric.
6. POLARITY LED
(See Figure B.1)
The Polarity LED
lights (green) when
the wire feeder is
connected for posi-
tive polarity. and is
not lit in Negative
Polarity. Use the polarity LED to verify the wire
feeder is connected properly for the process being
used.
NOTE: Both LED's will flash briefly when power is
applied to the feeder.
7. WIRE FEED SPEED RANGE SWITCH (K2613-5
and K2613-7 only.)
Used to select either HIGH or LOW range for the
Wire Feed Speed Control. LOW range allows for
more precise setting at lower feed rates. On the
Standard Torque models, selecting the LOW range
DOES NOT increase the torque of the wire drive
system.
OPERATION
M M
LN-25™ PRO
B-8