Troubleshooting Guide - Lincoln Electric RANGER SVM148-B Service Manual

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OBSERVE SAFETY GUIDELINES
DETAILED IN THE BEGINNING OF THIS MANUAL.
PROBLEMS
(SYMPTOMS)
Major physical or electrical dam-
age is evident.
No weld output and no auxiliary
power. Engine operates normally.
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.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. Contact your local Lincoln
Authorized
Facility.
1. Make sure the REMOTE switch
(S8) is in the proper position –
"MACHINE CONTROL" – if a
remote control unit is NOT con-
nected to the machine.
2. Check the brushes for wear and
proper contact to the rotor slip
rings.
CAUTION
RANGER 300 D AND 300 DLX

TROUBLESHOOTING GUIDE

RECOMMENDED
COURSE OF ACTION
1. Contact The Lincoln Electric
Field Service Service Dept. 1-800-833-9353
(WELD).
1. Perform the Rotor Voltage
Test.
2. If the Rotor Voltage Test is nor-
mal,
Resistance Test.
3. If the Rotor Voltage Test is NOT
normal, perform the Auxiliary
and Field Winding Voltage
Test.
diode bridge (D2), the field
capacitor (C1), and the Output
Control (R3). Replace if neces-
sary.
4. The control board may be
faulty. Replace.
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perform the Rotor
Then check the field