Most coin mechs will not accept coins after you have reached the maximum vend amount. If the maximum charge for a single item is $2.00 You can put in $1.00 + $2.00 and get change, but you cannot put in $2.00 + 1.00 because the maximum had already been reached with the $2.00 coin. If you raise the price of a selection to $3.00 you should find you can put in $1.00 + .25 +.25 + 2.00 but not 1+2+.25

thanks for that, but no that is not the problem, we already have one item set at $3.00 Thanks for trying to help anyway.

I don't know anything about this mech, but NRI is a Crane company. Try http://www.nationalvendors.com/
They will have contact numbers on their site and you should be able to get some help with it from the technical support department.
Good luck.

Thanks for the help, after finding some time to spend looking at it we have found out how to get the coin mech out and give it a good clean. It now accepts all coins which is great. However it will get to $2 or over and then stop accepting anything. ie if you put in $1.50 then put in a $2 coin it will accept this as $3.50 but not take anymore, however if you put in $2 and then try to add anymore it will not accept it.
Also I said it was a Snakmart III 5000, but under that it has a stamp saying model 3020. Not sure if that will change anyones knowledge?

What is the make and model of the coin mech?

Hi, the coin mech is a NRI series G46
We actually cant seem to get this out of the machine, it appears as if you lift it up and pull it out but things stopping us from lifting it up far enough, very strange.