Compressor Oil Circulation Control
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.
When the engine starts while the engine coolant temperature is 56 deg.C (133 deg.F) or less, ECM activates the compressor for approximately 6 seconds and circulates the compressor lubricant once.