prestoneo

Turned out to be a faulty NV10

Replaced the unit and all OK

Thanks for that, yes it is different but thanks for digging it out.

I've checked google and even found some guy on youtube lol who did an NV10 install vid on the exact machine, but he didn't know either.

So still no joy with that particular alarm code...

Somebody on here will know straight away, i'll just wait for them to point me in the right direction as you said

Unfortunately I don't have a manual for this machine

However I did find this post from NickYerPesos, machine is now working fine without the note acceptor

to go into test.. have your machine on and open the top door. wait for it to say doors open or read meters or similar. then find a button that is located within the back area of the machine (not the little red button)... there should be another behind the wood where the reels are.. just feel around until you find it.. it may even be behind the bottom door area.. basically just find another push button switch. then push that at the same time as pushing the little red test switch on the mpu gamecard. the machine should say the word "test" and your in test mode.
use the transfer and exchange buttons to navigate through the menu untill you find note acceptor settings, or bnv key... press start to enter that menu.
then use hold 1 and 2 and exchange transfer buttons to change the bnv key to 0 0 0 0 0 0.. then press start abd it should update.
I mainly work with bellfruit so cannot guarentee the exact buttons or phrases used.. but you get the gist..

So that's one problem down 

Thanks vectra,

Google is always the first port of call, and I do have the NV10 manual, evrything seems ok with that based on the steady green heartbeat LED

There is nothing specific relating to the interaction of the NV10 & Barcrest MPU5 which obviously crops up on a google search, hence reaching out to the people here who have the experience 

Ah thanks, yes i found it, I must have kept skipping past it previously as it stood out like a sore thumb after you saying where to find it