Am2 fault finding

[Sam4365]

Can a get some tips on the am2 fault finding.

1 fault that was on my list was chattering on DOL motor unsure how to find the fault.

 

[Darkwood]

Welcome to the forum

 

[Pete999]

Can a get some tips on the am2 fault finding.

1 fault that was on my list was chattering on DOL motor unsure how to find the fault.

Dirty magnet pole faces, grease etc on the DOL starter

 

[Richard Burns]

Chattering on a contactor normally indicates that the power supply has been wired through a NC contact rather than a NO contact so that when power is applied to the contactor the NC contact opens and switches the power off, so the NC contact then closes which switches it on again and so on.

 

[Bobster]

Or AC is being applied to a DC coil. Although in real life the coil burns out pretty fast.