Troubleshooting Guide - Lincoln Electric INVERTEC V300-PRO SVM105-B Service Manual

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TROUBLESHOOTING GUIDE

PROBLEMS
(SYMPTOMS)
Major physical or electrical dam-
age is observed when cover wrap-
around is removed.
Machine is dead — no output —
no fan — no display.
No output but fan operates and the
meter display is on.
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
1-888-935-3877.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
FEEDING PROBLEMS
Contact Lincoln Electric Service
Department (1-888-935-3877)
Power Switch must be in ON posi-
tion.
Check input voltage.
If machine is set for single-phase
operation, inspect to assure that
WHITE and BLACK leads of the
Power Cord are connected properly
and RED lead is not connected and
is insulated.
Check that input voltage set-up
switch and jumper A (the reconnect,
auxiliary jumper) are in proper posi-
tion for input voltage being used.
Output Terminal Switch or Remote
Trigger MUST be in ON position.
Local/Remote Switch must be in
LOCAL position unless remote con-
trol device is attached to remote
receptacle.
If machine has not been used for a
long time and is connected for 380
VAC or higher, Capacitors may
need "conditioning." See Input
Filter Capacitor Conditioning in
this section
CAUTION
V300-PRO
Observe Safety Guidelines
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
Check continuity of 3-amp slow
blow fuse located on reconnect
panel.
1. Check Power Switch (S1).
2. Look for loose or broken wires
between Power Switch and
Input Rectifier (component
D13).
3. Check for broken leads to pri
mary of Auxiliary Transformer
T1.
4. Possible open primary coil of
Auxiliary Transformer T1.
1. See Output Pilot Circuit test.
2. See Thermal Protection AC
Trigger Circuit test.
3. See Overvoltage Protection
DC Trigger Circuit test.
4. See Capacitor Balance test
5. See Switch PC Board test.
6. See Power Board test
7. Look for broken or loose con-
nections on high current-carry-
ing parts of machine (i.e.,
choke, output bridges, output
studs, main transformer.
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