Lincoln Electric IM910 LN-15 WIRE FEEDER - Manual (Page 29)

E-3 TROUBLESHOOTING E-3
LN-15 CONTROL CABLE MODEL (CE)
Observe all Safety Guidelines detailed throughout this manual
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.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
The Wire Feed Speed Range is only
50 - 374 in/min ( 1.3 - 9.5 m/min)
"POS", "PRE" or "BRN" show on the
display.
The voltage display reads "0.0" volts
during welding
Porosity in the weld.
Variable or "hunting" arc.
Variable or "hunting" arc.
The arc burns back to the tip.
1. The 83% wire feed speed dual
procedure is activated with the low
speed gear.
Check dual procedure
switch in gun.
1. The LN-15 is in the Press and
Spin set-up mode.
2. One of the DIP switches on the
feed head board is set to "ON" for
timer setting mode.
3. Cycle power to the LN-15 or wait
45 seconds.
4. The LN-15 is an old ALPHA unit
and a DIP switch is in the wrong
position.
1. The power source meter polarity
switch is in the wrong position.
2. Set the power source meter polar-
ity switch to match the welding
process.
1. The part being welded is wet, dirty
or rusty.
2. The electrode being used is wet,
dirty or rusty.
3. There is insufficient shielding gas
flow from possible cuts in the gas
hose
4. There is moisture or water in the
shielding gas line.
5. There is too much shielding gas
6. There is too much wind or drafts.
7. The arc voltage is set too high.
8. The wrong shielding gas is being
used.
1. Worn and/or melted contact tip.
2. Worn work cable or poor work
connection.
3. Loose electrode connection.
4. Wrong electrode polarity for the
process being used.
1. The spool of electrode is tangled.
2. The electrode and work leads are reversed
(welding with the wrong polarity.)
3. The liner is clogged.
4. The contact tip is worn.
5. The wire drive tension is improp-
erly set.
If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact
your local Lincoln Authorized
Field Service Facility.
If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact
your local Lincoln Authorized
Field Service Facility.
WELDING PROBLEMS
DISPLAY PROBLEMS