Just fitted Accenta MIni Gen 4 with LCD keypad. Front door (entry/exit) zone 1 lounge (2 pir's wired in series's, inhibited) zone 2 kitchen zone 4 landing zone 5 zones 3 6 7 & 8 unused used engineers code (9999) to set zones managers code users code & default code. Tried to set alarm, keypad showed tamper lockout fault, spring in keypad too short now ok, can not get back into engineers code? thinking of power down & disconnect battery then reconnect hope this resets engineers code? if this does not work thinking of default panel to factory settings or should I do something else?