Trouble Shooting - Electrical - Pro-Weld CD-212 Operation & Maintenance Manual

PRO
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 components.
3. The use of a volt/ohmmeter is recommended where any voltage may be present.
4. Use a continuity tester ( or troubleshooting light) for continuity checks only.
5. Possible causes marked with a star (*) are generally the most common problems.
PROBLEM
1. Welder does not turn on
and will not weld.
2. Fuse blows each time
unit is turned on.
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WEL D
POSSIBLE CAUSE
A. Power connections at
Welder or 110 VAC outlet
not complete.
*B. Broken power cable or
loose wire connection in
the plug.
C. Fuse blown.
*A. Shorted weld capacitor.
B. Shorted rectifier (BR1)
C. Incorrect primary hookup.
D. Shorted transformer
assembly.
CD -2 1 2
CORRECTIVE ACTION
Check connections.
Check wires for continuity.
Repair break.
Replace fuse.
Check safety vent seal for
Rupture hole. Replace
defective capacitor.
Check for a short across the
rectifier with ohmmeter.
Replace rectifier module if
shorted.
Check transformer connections.
Replace transformer.