Low weld output and low auxiliary output, Troubleshooting & repair, Caution – Lincoln Electric WELDANPOWER SVM 113-A User Manual
Page 45
TROUBLESHOOTING & REPAIR
F-7
F-7
WELDANPOWER 125
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
OUTPUT PROBLEMS
Low weld output and low auxiliary
output.
1. The generator brushes may be
worn. See the Maintenance
section of this manual or con-
tact your local Lincoln Electric
Authorized Field Service
Facility.
2. The engine RPM may be low.
1. Perform the Rotor Voltage
2. If the rotor voltage is low, the
field capacitor (C1) or the field
rectifier bridge (D1) may be
faulty. Test or replace.
3.
Check the rheostat (R1).
Normal resistance is 3.3 ohms.
See Wiring Diagram.
4.
The rotor may be faulty.
Perform the Rotor Resistance
Test.
5. The engine RPM may be low.
Perform the Engine Throttle
Adjustment Test.
6. If the engine idle RPM is okay,
the engine may have lost
horsepower and be in need of
major repair.