CD-212
PRO WELD
17.0 TROUBLE SHOOTING
–
ELECTRICAL
When troubleshooting the power unit/controller (welder), the following precautions must be
observed:
1. Welder must be TURNED OFF!
2. Unplug power cable from welder and wait at least two minutes before checking compo
nents.
3. The use of a volt/ohmmeter is recommended where any voltage may be present.
4. Use a continuity tester ( or troubles
hooting light) for continuity checks only.
5. Possible causes marked with a star (*) are generally the most common problems.
P
ROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
1. Welder does not turn on
A. Power connections at
Check connections.
and
will not weld.
Welder or 110 VAC outlet
not complete.
*B. Broken power cable or
Check wires for continu
ity.
loose wire connection in
Repair break.
the plug.
C. Fuse blown.
Replace fuse.
2. Fuse bl
ows each time
*A. Shorted weld capacitor.
Check safety vent seal for
unit is turned on.
Rupture hole. Replace
defective capacitor.
B. Shorted rectifier (BR1)
Check for a short across the
rectifier with ohmmet
er.
Replace rectifier module if
shorted.
C. Incorrect primary hookup.
Check transformer connect
ions.
D. Shorted transformer
Replace transformer.
assembly.
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18
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