A/C Control Unit

[Eig]

I am trying to find out which terminals on the A/C control unit does the purple wire which goes to a transformer and a black wire which goes to the gas solenoid connect to on a minimig 180c.

 

[Eig]

OK got the wires sorted - next problem is the torch is live all the time showing around 20v without pressing the trigger and burns the wire when arced to the earth clamp, the main solenoid clicks rapidly during this but the wire doesn't feed at this stage. The voltage then drops to about 6v but starts building up again to about 15v and if left will start buzzing and clicking the relay on the circuit board.

I have eliminated the torch by disconnecting the wire - a close visual check of the PCB shows no signs of burnt out components.

Anyone got any ideas??


Jim

 

[shenion]

Sounds like you wired that contactor wrong.

 

[Eig]

It was doing this before I moved the contacter - the wirws came off when I moved it.

 

[Eig]

Sorted - a close inspection of the PCB shows that the relay had been changed by the previous owner, an even closer inspection showed a small solder splatter - when this was removed the problem disappeared.