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FUNCTION PROBLEMS
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
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.
CAUTION
Major physical or electrical damage
is evident when the sheet metal
cover(s) are removed.
1. Contact your local authorized
Lincoln Electric Field Service
Facility for assistance.
1. Contact the Lincoln Electric
Service Department, 1-888-
935-3877.
No welding arc voltage when the
gun trigger is activated. The wire
feeds normally and the gas sole-
noid functions properly. The STA-
TUS LEDs are steady green on the
wire drive unit.
1. The Power source may unable to
produce welding output due to a
thermal fault or other malfunction.
Check STATUS LED on Power
Source. See PowerWave®
Troubleshooting.
1. Make certain the Power Wave
power source is functioning
correctly. (Green Status LED)
2. Check weld + work cable rout-
ing.
No control of wire feed speed. All
STATUS LEDs are steady green.
The preset wire feed speed is
adjustable on the front panel.
1. Check P9 plug and set at feed-
head control.
1. Perform the Tach Feedback
Test.
2. The wire drive feedhead board
may be faulty.
No wire feed, solenoid or arc volt-
age. The STATUS LED’s are
steady green.
1. The gun trigger may be faulty.
Check or replace.
2. Check panel connections and
switch(s) for proper operation.
1. Check the continuity of leads
from the gun trigger receptacle
to plug J85. See wire drive
wiring diagram.
2. The wire drive feedhead board
may be faulty.
The wire feed speed does not
change when welding current is
established. The WFS stays at
the run-in speed. The STATUS
LEDs are steady green.
1. The run in and weld wire feed
speeds may be set to the same
value. Set run in speed to a
value that gives best starting
results.
1. Perform the Current Transducer
Test in POWERWAVE® service
manual.
2. If the run in wire feed speed can-
not be adjusted, perform the
Tach Feedback Test and also
the Drive Motor Test.
3. The wire drive feedhead board
may be faulty.
TROUBLESHOOTING AND REPAIR
F-8 F-8
POWER FEED® 25M
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