Control By ECM

WARNING: This page is about a different car, the 2018 Infiniti Q60. However, it is still accessible from the selected car via links, so may be relevant.

Compressor Protection Control at Pressure Malfunction

The high-pressure side value that is detected by refrigerant pressure sensor is as per the following state, ECM requests IPDM E/R to turn A/C relay OFF and stop 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)
0.12 MPa (1.22 kg/cm ² , 17.4 psi) or less

Air Conditioning Cut Control

When the engine condition is high load, ECM makes the A/C relay to OFF, and stops the compressor.