Installed a Veritas six months ago for a friend (yes, I know, I should have known better) and everything has been fine since. He came to set it yesterday and was presented with the keypad display: ' Code accepted. Enter Command'. Resetting takes it back to disarmed but subsequent code inputs gives the same result. Never had this before on a Veritas or Premier so before I go round and try a factory reset I would appreciate any suggestions.