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No power to feed and gas after shipping machine.

No power to feed and gas relay after shipping machine.
Transformer hums if big relay manually pushed in.

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I would first check that the unit is set for your input voltage.

Posted on Jul 01, 2009

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Posted on Jan 02, 2017

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I think you have a 110 volt machine on which you are using a step down transformer. If so it seems that the voltage from the transformer is high or the current factor requirement is also insufficient . which can produce the hum or heat. Make sure the voltage is steady or else you will need to use a stabilizer or a proper power supply that is actually catering to the requirement of the machine. You have not mentioned the power factor of the machine and i suspect that the power supply used externally is insufficient.

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The weld wiring burning doesn't meant the transformer is good, it only means you have shorted hot to ground and thats what happens when hot touches ground it heats and melts. I would start by looking for a schematic for you welder. Check and making sure your getting good power to the power supply, relay(s) first. Also you can ohm out the transformer and check for the proper resistance but without the schematic/wiring diagram I can't say what the specs are. Normally on these the power comes in to the switch and then to the relay(s) which send power to the fan, and then splits to the trigger which allows power to the transformer, wire feed motor etc. But without the diagram your just shooting in the dark.

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