Hi all
OK so I got a Texecom Excel panel earlier in the year and the transformer has started humming/buzzing loudly. The supplier has sent a replacement transformer for me to fit. The question is, can anyone see a problem with doing this (semi) live? To avoid disarming the bell box etc., I was considering simply turning off the mains and running the system on battery in "engineer mode" while I swap out the transformer. Providing I am careful not to short anything, am I taking any risks here? Also, if I do turn the whole thing off and disconnect the battery, will I lose programs etc.?
TIA
Phil