Troubleshooting
No Output on Weld Receptacles but AC
Receptacle Output OK
If you have no welding power at all but the AC (120volts) is fully operational, this could
be caused by three components
The welding impedance (transformer)
The stator windings
The main welding rectifier bridge
Using the electrical diagram check for continuity of the welding impedance.
By
disconnecting the three heavy lead wires from the main welding bridge rectifier, you
can check continuity between those three wires. In any combination, the resistance
should be between one and 2 ohms. All three readings should be the same. If you have
readings that determines that the stator winding and impedance winding are in good
condition. With the three wires removed, you can now check the resistance of the main
Rectifier Bridge. By measuring resistance between the three terminals forward and
reverse you always should get a high and a low reading, for example; if you measure
between one and two, if the first reading is very high the reverse reading should be
very low. You also can check the bridge by taking a resistance reading on the main
welding terminals. Again, you should have a high and low reading by reversing the
leads.
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