mike 109444
Member
- Messages
- 4,666
This might help. Note there are various versions of the 150. Check the number on your pcb with the one on pic.
The thermal cutout should be stuck on the main transformer and when it gets hot it will go "open circuit" or yours may have STUCK open.
The parts that must be ok on your machine (as you say they are working) are the main transformer as it supplies power to the wire feed motor via the orange, pink and grey lines. The fan as it runs !
I would suspect the dark blue in pic.
1) The connection between the diode/bridge asy (ally plate device) to reactor (looks like another slightly smaller transformer but just two wires on it, one in and one out to the earth/work clamp.
2) The earth/work clamp and it's lead.
3) The connection between the diode/bridge asy and it's connection to the torch by the wire feed motor.
4) The torch that should be feeding the welding voltage up the torch to the contact tip.
The above can be checked with a multimeter set on DC volts and should get a reading between 14 to 30 Vdc depending what power setting is selected.
Think of the mig as a BIG ass power supply... 240Vac in 14 to 30Vdc out !
The thermal cutout should be stuck on the main transformer and when it gets hot it will go "open circuit" or yours may have STUCK open.
The parts that must be ok on your machine (as you say they are working) are the main transformer as it supplies power to the wire feed motor via the orange, pink and grey lines. The fan as it runs !
I would suspect the dark blue in pic.
1) The connection between the diode/bridge asy (ally plate device) to reactor (looks like another slightly smaller transformer but just two wires on it, one in and one out to the earth/work clamp.
2) The earth/work clamp and it's lead.
3) The connection between the diode/bridge asy and it's connection to the torch by the wire feed motor.
4) The torch that should be feeding the welding voltage up the torch to the contact tip.
The above can be checked with a multimeter set on DC volts and should get a reading between 14 to 30 Vdc depending what power setting is selected.
Think of the mig as a BIG ass power supply... 240Vac in 14 to 30Vdc out !