First of all, a HUGE thank you to Toyota of Long Beach20 minutes ago
The HVAC system uses an AC induction motor to drive a sealed-system scroll compressor, a design principle not usually used in automotive applications. Using a scroll compressor increases the efficiency of the system, while driving it with an AC induction motor makes the system more flexible, so the AC can run while the engine is off. Because the oil used with the refrigerant gas also flows in the area of the high-voltage motor-windings, the fluid must be electrically insulating to avoid transmitting electric current to exposed metal parts of the system. Therefore, Toyota specifies a polyolester (POE) oil (designated ND11) is required for repairs. The system cannot be serviced with equipment normally employed for regular cars, which typically use polyalkylene glycol (PAG) oil, as the equipment would contaminate the ND11 oil with PAG oil. According to SAE J2843 the oil provided from maintenance equipment must contain less than 0.1% PAG when filling. One percent PAG oil may result in an electrical resistance drop by a factor of about 10.
The Prius offers Toyota's in-house Entune software for smartphone integration. Setup requires a lengthy app download and account creation process. Entune's app support is meager and less intuitive than CarPlay or Android Auto (neither of which is offered). The Bluetooth menu offers better control and search functionality than most other Bluetooth systems.