I recently moved into a new property and discovered that when I turn on the split system (inverter reverse cycle heating/cooling) it causes equipment to make a buzzing sound (not a hum) it appears to impact SMPS and linear PS.
My Naim Uniti Nova doesn’t seem to be impacted until a second split system is turned on.
I’ve tried different power points, cables, DC blocker, power boards which don’t seem to help.
This property is a rental as I’m currently designing and building a house, so installing a dedicated line is not an option.
Has anyone has a similar experience and if so, did you find a solution?
I’d get an electrician in to do some visual checks and measurements, particularly regarding what the loading on your electrical supply looks like with the Aircon running. Something is clearly not right here, given the effect on your system.