Tw230 dhb chipper infeed won’t stay on only when button held on

[John sue]

Hi all 

2017 tw230 dhb chipper 

in feed green button when press won’t keep rollers turning 

only if held on green button 

black box speed fault 2 lights up solid when 

throttle turn over half way 

when turn throttle down light goes off 

also on hydrolic section at side of engine 

red light shows when green infeed pressed is this normal 

thanks please help 

all works and chips but only when green button held on 

 

checked all switches ✅

check stop bar switch ✅

checked relays ✅

checked throttle speed ✅

checked plug under chipper hopper ✅