We have an EST2 that says “Dialer is missing or has failed”. It has a DL2 dialer. We hadn’t had any dialer trouble until April 2017. When the panel reported the dialer had failed at that time, I installed a new dialer, programmed it, and all was well until now. Now the panel is giving me the same error on the replacement dialer.
Are DL2 dialers that unreliable or is it likely something else is going wrong with the panel? Has anyone successfully repaired a DL2? Examining the faulty dialer, I don’t see anything obvious. I realize components can fail without any physical signs, but still, I don’t see what the problem actually is with the faulty dialers.
This is a live system (not a hobby panel) but we have the blessing of our dealer to do our own work to keep this system working.