KIA Niro: Checking Refrigerant Specifications

  1. Check refrigerant specifications label inside engine room.


R-134a R-1234yf


  1. If refrigerant specifications label is not visible, check the refrigerant service port diameter.

High pressure side

R-134a R-1234yf

R-1234yf Low pressure side

Low pressure side

R-134a R-1234yf

R-1234yf Service port diameter for high/low pressure side varies based on refrigerant

Service port diameter for high/low pressure side varies based on refrigerant specification.


     Refrigerant System Service Basics (R- 134a)

    For the electric compressor using high-voltage, use POE oil with high insulation property. Use a separate equipment (refrigerant recovery / charger) exclusive for hybrid vehicle maintenance to prevent infusion of PAG oil of non-hybrid v

     Refrigerant System Service Basics (R- 1234yf)

    Refrigerant Identification Do not mix HFO-1234yf (R-1234yf) in the vehicle with other refrigerant, such as R-12, R-134a and etc. Use only the UL-listed service equipment certified to meet the requirements of SAE standards to recover and r

     Filter  inspection

    The climate control air filter should be replaced according to the maintenance schedule. If the vehicle is operated in severely air-polluted cities or on dusty rough roads for a long period, it should be inspected more frequently and replaced


     Energy flow

    The hybrid system informs the drivers its energy flow in various operating modes. While driving, the current energy flow is specified in 11 modes. Vehicle stop A: Idle Mode The vehicle is stopped. (No energy flow) EV propulsion A:

     Low Voltage DC/DC Converter

    Specification Description The Low Voltage DC/DC is integrated into the HPCU. It charges the auxiliary battery as a substitute for generator by converting the high voltage (DC 270V) from the high voltage battery into low voltage (DC 12V).