Daikin. Also check out the Johnson Controls managed York which is based on Hitachi technology but marketed by York team. Very impressive and locally produced.

We hear that a lot and it boils down to varying factors. Rest assured I've used them for over 10 years of various models in various places I've stayed. It's generally ok so long as it's regularly serviced at least once a year.

Also inverter AC pipes needs to be thick 0.8". Some models have extra communication cable between compressor and indoor blower. Manufacturers also specify safe distance from compressor to wall/roof/other so that they don't overheat and konk so easily. Some are specific that the pipe must curl one round esp Korean brands. Then there are workmanship and how skilful they install esp piping to compressor. Then there's piping and drainage placement, etc.

Most times, it's a combination of these.

Yes. Especially Daikin Japanese and Thai manufactured AC. They're equipped with compressor protection circuitry. If a leakage is detected and coolant pressure is running low, it will shut off AC with a corresponding error message.

Most times problems root cause is attributable to cheap China copper pipes. I recommend going for better quality pipes with pre-fitted insulation like Inaba Denko's Paircoil (JP) or Smartco's Paircoil (KR). If you're in JB, across the straits sells the better one i.e. Armacell's Armaflex (UK). Pipe thickness should be for R410a gas at 0.8" (inverter and non-inverter) as R22 is phased out.

Each manufacturer have heat dissipation specs like fridge, tv where there's a minimum distance required from wall, ceiling and esp in relation other compressors e.g. living room and master bedroom.

As long as these are adhered to and AC are regularly serviced, they should present less issues.

But good piping is the key along with a skilled installer.

Allco Parts in Kelana Jaya. You're looking for 1hp piping?

To be safe, a thicker pipe offers a better safety margin. Not wrong to use the thin ones. Don't stinge on piping and insulation. I've pm-ed you a contact.