Periodic system diagnostic of a transport refrigeration system

摘要

Methods and systems for periodic system diagnostic of a TRS are provided. In particular, a TRS controller is configured to periodically activate an engine control unit (ECU) of a genset to acquire engine sensor information while the engine is not running. The TRS controller is configured to determine an efficient time to bring the ECU out of a minimum electrical power consumption stage into a medium power consumption stage in order to determine a next action of the TRS.

主权项

1. A method for periodic system diagnostic of a transport refrigeration system for a refrigerated transport unit, the transport refrigeration system including a transport refrigeration unit controlled by a transport refrigeration system controller and powered by an electrically controlled engine having an engine control unit, the method comprising:
the transport refrigeration system controller sending a medium electrical power consumption stage activation signal, via a keyswitch connection, to an electronic control unit when the electronically controlled engine is set to an engine operating mode in which the electronically controlled engine is not running, the medium electrical power consumption stage activation signal instructing the electronic control unit to activate and operate at a medium electrical power consumption stage; the transport refrigeration system controller obtaining engine sensor data from the electronic control unit via a Controller Area Network (CAN) communication interface bus; the transport refrigeration system controller determining a periodic system diagnostic time period based on the engine sensor data obtained from the electronic control unit.