The machine does not have maximum output, Troubleshooting & repair, Caution – Lincoln Electric IDEALARC SVM 122-A User Manual
Page 53
TROUBLESHOOTING & REPAIR
F-9
F-9
LINCOLN
®
ELECTRIC
IDEALARC DC-400
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
The machine does not have maxi-
mum output.
1. Make certain the correct three-
phase input voltage is being
applied to the machine.
2. If remote control is being used,
set the Output Control switch
(S2) in the OUTPUT CONTROL
“LOCAL” position and control
the weld output with the
machine Control potentiometer
(R4). If the problem is solved,
check the remote control unit
(or wire feeder) and associated
control cable.
1.
Check the Output Control
potentiometer (R4). Normal
resistance is 10,000 ohms.
Also check associated wiring
for loose or faulty connections.
See Wiring Diagram.
2. Check the welding Mode switch
(S4), the microswitches, and the
associated wiring.
3.
Check the Output Control
switch (S2) and associated
wiring. See Wiring Diagram.
4. Perform the Main Transformer
5. Perform the SCR/Diode Rec-
6.
The control board may be
faulty. Replace.