Patent ID: 8019480

Claim:
A method for controlling a cooled or heated water pump of an air conditioning installation, comprising: upon operation of a heat source of the air conditioning installation in a room cooling or heating mode to bring a temperature of water used in the air conditioning installation within a predetermined range of temperature, operating a motor, which drives the pump to deliver cooled or heated water from the heat source into an indoor unit, to rotate a number of revolutions N 1 initialized by means for controlling rotation of the motor; and when the temperature of the cooled or heated water is within the predetermined range of temperature and the operation of the heat source is halted, operating the motor to rotate a number of revolutions N 2 until the temperature of the cooled or heated water reaches a predetermined value P 1 , wherein the number of revolutions N 2 is determined by the means for controlling the rotation of the motor based on at least one condition obtained at a time of halting the operation of the heat source.