Lincoln Electric POWER FEED 25M NNS Operator's Manual page 53

POWER FEED™ 25M NNS
PROBLEMS
(SyMPTOMS)
The feeder does power up - no dis-
play, no cold feed.
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
Output Problems
1. The POWER FEED™ 25M NNS
power switch is OFF.
2. The Power Wave power source is
OFF.
3. The circuit breaker for the wire
feeder on power source have
tripped.
4. The control cable may be loose or
damaged.
5. The power switch is damaged.
1. The gas supply is OFF or empty.
2. The gas hose is cut or crushed.
3. Dirt or debris is in the solenoid.
4. There is a loose solenoid connec-
tion or the solenoid has failed.
5. 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 rolls
and/or inner wire guide.
7. Incorrect tension arm pressure on
the drive rolls.
8. Worn drive roll.
CAUSE
1. Turn the POWER FEED™ 25M
2. Turn ON the Power Wave power
3. Reset the circuit breakers.
4. Tighten, repair or replace the con-
5. Replace the power switch.
1. Verify the gas supply is ON and
2. Route the gas hose so it avoids
3. Apply filtered shop at 80psi to the
4. Remove the cover and check that
5. Replace the solenoid.
1. Keep the gun cable as straight as
2. Remove the gun from the wire
3. Blow dirt out of the liner with low
4. Use only clean electrode. Use
5. Replace the contact tip.
6. Verify the proper parts are
7. Adjust the tension arm per the
8. Replace the drive rolls if worn or
CAUTION
E 3
TROUBLE SHOOTING
RECOMMENDED
COURSE OF ACTION
NNS power switch ON.
source.
trol cable.
flowing.
sharp corners and make sure
nothing is on top of it. Repair or
replace damaged hoses.
solenoid to remove dirt.
all connections are in good condi-
tion.
possible. Avoid sharp corners or
bends in the cable.
feeder and pull the jammed wire
out of the gun and cable.
pressure (40psi or less). Replace
the liner if worn.
quality electrode, like L-50 or L-56
from Lincoln Electric.
installed.
Instruction Manual. Most elec-
trodes feed well at a tension arm
setting of "3".
filled with dirt.