Hello there. For context;

I recently bought 3 ACs for my 700 sqft living dining space combo.

Initially the idea was to switch the AC's on on 12 hour intervals, so AC 1 will turn on, and then AC 2 will turn off and vice versa. Temps were set to 27C as for some unbeknownst reason, this temperature seems to be very comfortable compared to the previous house. Previously we had to set it to 22C. Might be because of the ceiling and floor insulation and because mine's a terrace, so my neighbours provide the wall insulation.

My technician however, said it's better to just keep them both running 24/7. He explains that Daikin actually builds the inverters to be operated 24/7. Like it's literally in his training, he was told to recommend the customers to keep it on if they can. Customers that do this, he only goes once every 6 months to clean out the filters and check, and typically no issues.

He said the most strenuous part of the AC is in starting the system as it sends a jolt of amperage and then it has to run extremely hard to cool the walls and all heat retaining masses in the house. Apparently this is what kills the electronics and inverters have really sensitive chips. We have the luxury of solar power & a 2 year warranty, so we figured we might as well try it.

It's been 3 weeks now, and we haven't turned off the AC since we installed it. We got our first bill and we still have an excess of 80kw of solar power. Granted this isn't the full 4 weeks of a month but that's our billing cycle.

I'm posting to see if anyone else does this, and hows it been for you?

For inverter type ac, your technician is right.