Sensors, electronic parts price are far more lower (can be negligible) than the mechanical parts (cooling coil, condenser fin) in an aircond. Remember, in an electrical appliances, plastic parts (which mostly made by crude oil) and all other mechanical parts (especially aircond which use alot of aluminiums in the construction) material cost are far more higher than the electronic part. In an aircond, the estimated BOM cost for electronic vs non electronic = 10% vs 90%, you weight yourself. But the appearance to the customer will be those 'high tech electronic features', that's why they need to include to impress ppl, in fact, those added features cost is almost negligible, just using 1 or 2 extra sensor and few software algorithm to achieve it, is almost free for them.

From your point of view, they sacrifice some comfort for electricity saving, but from the point of view of Pana, they sacrifice comfort for lower material cost, that's the fact, the electricity saving is just a 'by product' of their cut cost activity. Sorry if it sound offended, but naturally i don't have good impression on Pana product, becos i was a R&D electronic engineer in Pana for 5 years before, cut cost was their philosophy, especially now after they faced a huge deficit in their finance globally in year 2013, cut cost is their 1st priority, cost down or terminate business, and this is part of the reason i left the company.