hobart handler 175 no wire feed or weld output

[bagshaw]

i have a handler 175 welder. It had no wire feed and no weld output i thought i troubleshot it back to the the circuit board but i replaced the circuit board and i'm still having the same problem.

[rufus]

Does the fan turn on?
Do you hear the clunk noise when you pull the trigger?

Be sure you don't have an open circuit breaker.

Also be sure the selector switch is not on purge.

[skipnrocks]

anything new on this? did you figure it out? I am having the same problem with my 140

[bagshaw]

the fan comes on and when i pull the trigger the relays do engage. The circuit breaker is fine and so is the thermostat. but the feed doesnt engage and there is no weld output

[old fart]

It sounds is if the fan motor may be bad. The motor serves as a step down transformer as well as cooling so it may run but not provide the 24V AC the control board needs to operate.
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[bagshaw]

Well i just checked that an the fan is outputing 24v AC back to the control board

[Hobart Expert Keith]

Do you have power to the weld terminals when the trigger is depressed?

You should have 29VDC on range 4.
If not, check your voltage selector switch,

Keith

[bagshaw]

well pissed me off i went back to check the voltage at the terminals and the welders working fine. So now i've just got to find the broken wire or loose connection. thanks for the help

[Hobart Expert Keith]

The connection your looking for would be the 4 pin connector from the motor to the board. also make sure the connections at RC5 and RC2-1 are good. This feeds the weld voltage to the control board for the motor drive voltage.

Keith

[Hobart Expert Darrell]

Check the connectors that plug into the board and fan motor to make sure that the individual terminated wires are firmly snapped into the plastic housing of the connector. You can check this by a light (emphasize light) tug on each wire. If the wire isn't properly snapped into the housing, it will slide out easily. This will cause intermittent contact. As the connector is pushed onto its mate, the terminal that's not snapped in properly will slide out and make point contact that can be interrupted by shock or vibration.