If it says tamper, it could be tamper.
You would need to short the tamper cct connections, If it then clears, you may have wiring fault, you would then need to short tamper loop on each sensor, to find out which one the fault is on, Not forgetting, the bell box, can also set tamper. If you find one sensor gives the error, 1st check at the sensor, then check wiring, to find fault.
SD, February 2012