If the engineer code has been lost or forgotten or in extreme circumstances, where a software crash has occurred, it may be necessary to clear the Non Volatile Memory (NVM) and return to factory set conditions, proceed as follows:
1) Remove the mains supply and cause an alarm condition by removing the CPU cover.
2) Disconnect the battery. If self contained, the external sounders will operate.
3) Remove all wires from terminals 17 (PA) and 27 (SET +).
4) Fit a wire link between terminals 17 and 27 and apply power.
5) The system will power up with no alarm condition. Remove the wire link and replace the original wiring.
6) The RKP indicators will show in response to each of the zones and circuits as they operate. Refit the CPU cover checking that the Tamper indicator goes off.
When ALL of the zones and circuits become clear the system will go to Day mode and at that moment the NVM will be cleared and factory set conditions will apply.
7) The system may now be programmed, tested and re-commissioned.
acorn, April 2009
