Yesterday, when this initially happened the RKP was "dead", which is what led me to check the fuses. I replaced the visibly blown Aux fuse with a 500mA. Doing this is what resulted in the RKP showing *************'s and flashing.
Tonight, thinking the new fuse/one of the other fuses could be to blame, I swapped them all out. Which resulted in the sounder going off, previously, replacing the fuses one by one was enough to stop the sounder, but not this time. So I've disconnected the battery, pulled all fuses and going to let it run its course... Grrr.
The panel feed has a 3A fuse.
F1, has a 1A (Battery)
F2, has a 500mA (Aux)
F3, has a 500mA (Bell)
A few years ago I installed a C020, and I remembered that I had a flash cable and RSS software, so I fired that up. I was able to run an RRI, which suggested;
Panel AUX Voltage is out of the range or have more than 5% difference to baseline.
The audit logs show...
Looking under Keypad/MAX in RSS reveals nothing on either 1/2/3.
I'm beginning to think the fitters gone through a wire or something, and tinkering on the IT side of things (resetting it etc), isn't going to help.