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Well, I found out that when the battery is kaput, the error code can read anything, r2,r1,r4 etc even if they are not connected. Put a new battery, and do full system reset and reprogram My system is up and running.

Hi, I. need help on the above panel which I installed in my house about 15 Years ago. Once when disarmed , the internal sounders went off and error code R2 appeared during a storm. I suspected the antitamper switch behind the 2nd keyboards could have triggered due to a banging front door.. i...