Refrigerant Pressure Protection
WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
The refrigerant system is protected against excessively high- or low-pressures by the refrigerant pressure sensor, located on the liquid tank on the condenser. The refrigerant pressure sensor detects the pressure inside the refrigerant line and sends a voltage signal to the ECM. If the system pressure rises above or falls below the following values, the ECM requests the IPDM E/R to de-energize the A/C relay and disengage the compressor.
- 3.12 MPa (31.82 kg/cm 2 , 452.4 psi) or more (When the engine speed is less than 1, 500 rpm)
- 2.74 MPa (27.95 kg/cm 2 , 397.3 psi) or more (When the engine speed is 1, 500 rpm or more)
- 0.14 MPa (1.43 kg/cm 2 , 20.3 psi) or less