Quote Originally Posted by m_c View Post
What happens to the voltages while the motors are starting, and the contactor chattering?
From putting the meter over A1, A2 on the contactor and pressing the start button the voltage is not instant ie it climbs to 240v while it chatters,
same if you put it over any of the other contacts. When it pulls in it is 240v. So readings might be 50, 70, 130, 170 then 240v (all while chattering)

Is there a way of wiring out the braking board item 7 on the drawing and still making the machine work to eliminate it from being the problem?
I can disconnect wire 24 from the contactor to stop it breaking, but there are 5 other wires still connected.

Then I can happily spend the £500 knowing that that is the cause.