Patent ID: 9297578
Filing Date: 2016-03-29
CPC Classification: B60H,F25B,F25D

Claim Text:
1. A method of operating a transport refrigeration unit having a compressor powered by AC electric current to limit current draw by the compressor, the method comprising: (a) determining whether an ambient temperature in which the refrigeration unit is operating has been greater than a set point ambient temperature for a first time period; (b) determining whether the refrigeration unit has been operating in a temperature pulldown mode for more than a time period, Z; (c) determining whether the AC electric current is equal to or exceeds a preset maximum current limit; (d) determining whether a time period between a last defrost cycle and a next previous defrost cycle is less than fifteen minutes; and (e) when the determination is yes in both of step (a) and step (b) and is also yes in at least one of step (c) and step (d), reducing the preset maximum current limit to a first reset maximum current limit.