Urgent help anyone, event tomorrow!!

[leorcc]

maybe a relay that is stuck?

[ady]

right, switched the speed controller but not the wiring and the fault is still their but on the other side!! so it looks to be a speed controller fault.

Id agree with Leo ....check the relays on the duff board.

http://www.4qd.co.uk/serv/nccfaults.html#onedirhttp://www.4qd.co.uk/serv/nccfaults.html#onedir


Also check the relay operating voltage.


The voltage is marked on the relays. Make sure these are correct as 24v relays will not operate from 12v and 12v relays will soon burn out their coils if used on 24v.
36 and 48v versions use the 24v relays but with a resistor in series with the relay coils and other components changed as appropriate.

http://www.4qd.co.uk/serv/nccv.html#coilvhttp://www.4qd.co.uk/serv/nccv.html#coilv

(Message edited by woody on April 27, 2007)

[woody]

http://www.4qd.co.uk/serv/nccfaults.html#rnehttp://www.4qd.co.uk/serv/nccfaults.html#rne

The fault described in the above link matches your description.

Item 23 in this link (Reverse-ignition diode 1N414
http://www.4qd.co.uk/serv/nccbits.htmlhttp://www.4qd.co.uk/serv/nccbits.html

(Message edited by woody on April 27, 2007)

[ady]

thanks for that, i will have a look after the event, unfortunately time is against me now.

A quick snip of just one leg of the offending diode ( effectively removing it from the circuit ).....if it exists on your board ...should prove if its at fault i.e. Short circuit.

Go on .......youve got plenty of time.

(Message edited by woody on April 27, 2007)

guys, thanks alot for all your tips but unfortunately on my first outing, it didnt run.... just sat looking pretty!! thanks again

Bum:sad: ...

Id be interested in the final verdict on the fault should you fix it.

im in 2 minds at the moment as i think its about time i changed to a robotec or something else.

do it ady you know you want one.