Abstract: A cooling system for a machine having an engine and an operator cabin includes a primary air conditioning unit, an auxiliary air conditioning unit, an electrical powering unit configured to electrically power the auxiliary air conditioning unit, a sensor configured to generate a signal indicative of a temperature within the operator cabin, and a controller in communication with the primary air conditioning unit, the auxiliary air conditioning unit, and the sensor. The controller selectively activates the primary air conditioning unit and the auxiliary air conditioning unit. When the primary air conditioning unit is activated, a timer is started to determine the elapsed time during which the temperature within the operator's cabin exceeds the acceptable range of desired temperature, and the auxiliary unit is activated when the elapsed time exceeds a threshold time.

Abstract: A cooling system is disclosed for use with a machine having an engine and an operator cabin. The cooling system may have a first pump configured to circulate coolant through the engine, a heat exchanger configured to receive coolant from the engine and transfer heat between the coolant and air passing through the heat exchanger, and a fan configured to generate a flow of air through the heat exchanger and into the operator cabin. The cooling system may also have an air conditioning unit configured to chill coolant, and a second pump configured to circulate coolant from the air conditioning unit through the heat exchanger.