Troubleshooting Guide - Lincoln Electric RANGER 9 SVM 110-A Service Manual

F-4
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
216-383-2531 or 1-800-833-9353.
RANGER 9
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. Contact your local Lincoln
Authorized
Facility.
1. Make sure the REMOTE switch
(S4) 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

TROUBLESHOOTING GUIDE

RECOMMENDED
COURSE OF ACTION
1. Contact The Lincoln Electric
Field Service Service Dept. (216) 383-2531 or
1-800-833-9353 (WELD).
1. Perform the Rotor Voltage
Test.
2. If the Rotor Voltage Test is nor-
mal, then perform the Rotor
Resistance Test.
3. If the Rotor Voltage Test is NOT
normal, perform the Auxiliary
and Field winding Voltage Test.
Then check the field diode
bridge (D2), the field capacitor
(C1), and the Output Control
(R3). Replace if necessary. If
the field bridge, field capacitor
and Output Control are good,
then the printed circuit board
may be faulty. Replace.
F-4
RANGER 9