keith I don't know what you've fitted but an accenta + has four led lights on it one is marked TA = tamper.
Lets get one thing straight here the codes are not stored in the keypad they are stored in the main programmable chip in the main panel, the keypad only communicates with it.
So if you have connected the wires correctly I don't see a problem I have changed these lots of times when the buttons become worn out and stop working.
Rob
March 2010