Lincoln Electric WELDANPOWER SVM 113-A Service Manual page 45

F-7
TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
Low weld output and low auxiliary
output.
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.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. The generator brushes may be
worn. See the Maintenance
section of this manual or con-
tact your local Lincoln Electric
Authorized
Facility.
2. The engine RPM may be low.
CAUTION
WELDANPOWER 125
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
1. Perform the Rotor Voltage
Test.
2. If the rotor voltage is low, the
field capacitor (C1) or the field
Field Service
rectifier bridge (D1) may be
faulty. Test or replace.
3. Check
Normal resistance is 3.3 ohms.
See Wiring Diagram.
4. The
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.
F-7
Observe Safety Guidelines
the rheostat (R1).
rotor may be faulty.