I recently moved to a new house and tried to re-set up my simple CM15A to PAM21 module connection. The module stays "normally on" and when I turn it off thru the software it goes off for 3 seconds and turns itself back on.
PAM21 worked correctly in old house, and you have not changed any macro programming?
Do you have macro in AHP that turns PAM21 on?
If so, is the PAM21 house code, the CM15A/AHP monitored house code?
In other words, is AHP forcing PAM21 back ON even after you turn OFF because it is set ON in AHP?
If you have another transceiver (TM751 or RR501) disconnect CM15A and use other tranceiver. Does PAM21 come back ON now?