Patent ID: 8737059

Claim:
A method for controlling and monitoring an air-conditioning system of a data processing installation comprising at least one server switchgear cabinet for accommodating electrical units, wherein hot air is sucked by an air-conditioning device via a hot air suction, is cooled to cold air and is blown via a cold air injection indirectly or directly into the at least one server switchgear cabinet or into a cold aisle which is confined by two rows, each of the rows including at least one of the at least one server switchgear cabinet or the air-conditioning device, wherein the cold air is sucked from the at least one of the server switchgear cabinet from the cold aisle and is transported into a hot aisle separated from the cold aisle or into an ambient space, wherein, by air temperature sensors, temperatures of the hot air at the hot air suction and the cold air at the cold air injection of the air-conditioning device and, by cooling medium temperature sensors, temperatures of a cooling medium passing through one or more heat exchangers in the air-conditioning device for dissipation of a heat loss on a cooling medium inlet side and on a cooling medium outlet side are determined, analyzed and a power of at least one blower in the air-conditioning device is controlled, wherein controlling of a cooling power of the air-conditioning device is performed in at least two distinct defined modes, wherein in a first operating mode of the at least two distinct defined modes, an air supply volume capacity of the at least one blower is controlled to a minimum value at a maximum defined temperature difference between the hot air and the cold air, the maximum defined temperature difference between the hot air and the cold air is used as a reference variable, and a cooling medium flow of the cooling medium is varied at the minimum value of the air supply volume for controlling the maximum defined temperature difference, and in a second operating mode of the at least two distinct defined modes, the cooling power is controlled such that a maximum defined temperature for the cooling medium flowing from the one or more heat exchanger is not exceeded.