I have two keypads, HRT-6LKP-C and HRT-6LRL-C, both used from different projects. Both worked on their old systems. I followed the factory reset procedure in App note #102: Press and hold buttons 1-3-5 until the LEDs flash, then press and hold 1-5 until all LEDs flash. Both keypads display a different behavior than APP Note #102 indicates; pressing 1-3-5 and holding causes all LEDs to chase downwards twice, then pressing 1-5 and holding causes all the LEDs to do the same (chase down twice). Then, pushing any button once causes the same chasing twice behavior of all the LEDs.
Anyway, neither keypad will respond to the serial number addressing.
Is there perhaps a different way to factory reset these units?