Hy­brid ve­hi­cles

Car Mechanics (UK) - - Air-Conditioning Repairs -

As the air-con­di­tion­ing units on hy­brids have to work with the en­gine switched off, the com­pres­sors con­tain an elec­tric drive medium, which was in­tro­duced with the sec­ond-gen­er­a­tion Toy­ota Prius. Un­sur­pris­ingly, these de­vices op­er­ate at high volt­age and are filled with spe­cial POE oils with a high elec­tri­cal re­sis­tance. The use of an in­cor­rect oil can cause ei­ther per­ma­nent dam­age, or else the cli­mate con­trol ECU can de­ac­ti­vate the com­pres­sor. The power sup­ply is pro­vided by sep­a­rate bat­ter­ies. The third-gen­er­a­tion Prius in­tro­duced a so­lar-pow­ered ven­ti­la­tion sys­tem as an op­tional ex­tra, with air-con­di­tion­ing that could run for up to three min­utes be­fore the en­gine was started.

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