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
MULTI-SOURCE
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 1-
800-833-9353.
OUTPUT PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
The white power light is lit and the
input contactor activates but there
is no welding output. The amber
thermal light is NOT lit.
The Multi-Source operates but
does NOT have maximum welding
output. 40,000 watts on 60 Hz -
36,000 watts on 50HZ.
1. Check the welding cables for
loose or faulty connections.
2. Make certain the Multi-Weld(s)
are connected and operating
properly.
3. Check (at the output terminals
of the Multi-Source) for
approximately 75-80VDC open
circuit voltage. If this voltage
is present, the problem is most
likely external to the Multi-
Source machine.
1. Check all three phases of the
input voltage at the Multi-
Source machine. Make sure
the input voltages are present
and match the machine’s rat-
ing and reconnect panel con-
figuration.
2. Check for loose or faulty weld-
ing cables.
1. Perform the Firing Board Test.
2. Perform the Control Board
Test.
3. Perform the SCR Rectifier
Bridge Test.
4. Perform the Main Transformer
(T1) Test.
5. Perform the Input Contactor
Test.
1. Perform the Main Transformer
(T1) Test.
2. Perform the SCR Rectifier
Bridge Test.
3. Perform the Input Contactor
Test.
4. Perform the Firing Board Test.
5. Perform the Control Board
Test.
6. The output shunt may be
faulty. See Display
Calibration Procedure.