Filter
Top Products
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC
TROUBLESHOOTING & REPAIR
F-5 F-5
LN-9 GMA Wire Feeder
TROUBLESHOOTING GUIDE Observe Safety Guidelines
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 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.
3. Perform the
Trigger
Transformer T2 Test.
4. Perform the
Wire Drive Motor
Test.
5. The Trigger Board may be faulty.
6. If the wire drive motor is OK, the
power PC board or the control
board may be faulty.