Troubleshooting & repair, Caution – Lincoln Electric LN-9 SVM127-A User Manual
Page 64
TROUBLESHOOTING & REPAIR
F-6
F-6
LN-9 Wire Feeder
Observe Safety Guidelines
TROUBLESHOOTING GUIDE
detailed in the beginning of this manual.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
216-383-2531 or 1-800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
FUNCTION PROBLEMS
No wire feed when gun trigger is
activated. The drive rolls do not
turn. The digital meter does light
but reads only the SET voltage and
wire speed values.
1. The Ground Lead Protector
may have tripped. Reset and
clear possible fault between
electrode circuit and feeder
frame.
2. The gun trigger may be faulty.
1. The 1CR relay on the power PC
board may be faulty. Check or
replace.
2. Check resistor R1. Normal
resistance is 2 ohms. See the
Wiring Diagram.
3. Perform
the
3. Perform the
Trigger Board
Test.
4. Perform the
5. If the wire drive motor is OK,
then the power PC board or the
control PC board may be faulty.