ATLANTA - AirSept's new A/C Charge Guard filter allows technicians to charge refrigerant into hybrid vehicles while eliminating the risk of lubricant or debris contamination causing damage to electric compressors.
Most electric compressors used in hybrid vehicle A/C systems require a polyolester (POE) lubricant.
Even a small amount of PAG oil (the lubricant commonly used in belt-driven compressors) can damage the high voltage insulation in an electric compressor, according to the company. This damage creates a ground isolation fault that leads to compressor failure and an engine no-crank condition.
Vehicle and compressor manufacturers specify that no more than 1 percent of total lubricant in a hybrid A/C system can be PAG oil. This includes any PAG contained in leak detection dyes, and the PAG that remains in A/C service equipment hoses after use.
SAE has proposed a new J2788H specification for charging hybrid A/C systems. It recommends that the amount of PAG or other non-POE lubricant be limited to no more than 1,000 ppm, to stay below the 1-percent limit set by compressor manufacturers.
A single A/C Charge Guard unit allows no more than 100 ppm of liquid (including PAG) into the A/C system - only one tenth of the 1000 ppm limit proposed by SAE J2788H. And A/C Charge Guard traps all debris, so none enters the vehicle.
J2788H also recommends that technicians change or flush hoses before charging a hybrid vehicle from equipment that is also used to service non-hybrid vehicles. Using A/C
Charge Guard instead traps any lubricant coming out of the service hoses. This saves the technician from having to flush or change hoses, lowering labor cost for the job.
A/C Charge Guard works with new and existing A/C service equipment. Today, you can protect hybrid vehicle A/C systems from PAG oil and other contaminants by using AirSept's new A/C Charge Guard when charging hybrid vehicles.
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