INVERTEC V300-I
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F-4
TROUBLESHOOTING & REPAIR
Troubleshooting Guide
— See Wiring Diagrams for location of specified
components. See Schematic Diagram for troubleshooting of specific circuits.
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
No output or reduced output the
first time power is applied to
machine.
Output turns on momentarily, then
switches off and repeats cycle.
Remote output control not function-
ing. Machine performs well on
LOCAL control.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
Check input voltages, fuses, and
input voltage reconnect proce-
dures. See Installation section.
If high input (380 VAC or higher)
voltage is applied. Capacitors may
need conditioning.
Check input voltages and recon-
nection procedures. See Instal-
lation section.
Check output terminal switch S4
and/or Remote Trigger Options
(i.e., wire feeders, guns, cables,
etc.).
Test or replace Output Remote
Control Device.
POSSIBLE AREAS OF
MALFUNCTION(S)
Check continuity of 3-amp slow
blow fuse located on reconnect
panel.
1.
See Thermal Protection AC
Trigger Circuit test.
2.
See Overvoltage Protection DC
Trigger Circuit test.
3.
See Static Capacitor
Balance/Dynamic Capacitor
Balance test. NOTE: This test
is necessary only if machine is
connected for 380 VAC or high-
er.
4.
See Switch PC Board test.
5.
See Snubber Resistor test.
1.
Test Local/Remote Switch S3
with ohmmeter. See schematic
drawing in Electrical Diagram
Section.
2.
Check continuity of
local/remote circuit. See
schematic drawing in Electrical
Diagram Section.
OUTPUT PROBLEMS (continued)
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln
Electric Service Department for technical troubleshooting assistance before you proceed call 216-383-2531 or 1-800-833-9353.
CAUTION
