A device-registration-operation assisting apparatus in a device management system including a plurality of devices installed in a building and a management device connected to the devices via a network, assists in an operation to register the devices. The device-registration-operation assisting apparatus includes an emission unit of an electromagnetic wave, and a mobile terminal. The emission unit is integrated into or positioned near one of the plurality of devices. The mobile terminal includes a receiving unit that receives the electromagnetic wave, a display unit that displays information of the device, and an input unit that receives an input of registration information in order to register the device displayed on the display unit in the device management system. The display unit does not display the information of the device for which the registration information is input to the input unit, or changes display of the information.

An air conditioning control system includes an air conditioner, an air conditioning control device with a display, and an operation terminal with a camera. First authentication information included in a two-dimensional code displayed in the display in the air conditioning control device is collated with second authentication information acquired from the two-dimensional code imaged by the camera in the operation terminal and included in registration information transmitted from the operation terminal, to determine whether the first authentication information and the second authentication information match with each other. In response to the first authentication information and the second authentication information being determined to match with each other, the operation terminal that has terminal information included in the registration information is successfully authenticated and registered as an operation terminal that is enabled to perform a remote operation of the air conditioning control device.

An air conditioning control system includes an air conditioner, an air conditioning control device with a display, and an operation terminal with a camera. First authentication information included in a two-dimensional code displayed in the display in the air conditioning control device is collated with second authentication information acquired from the two-dimensional code imaged by the camera in the operation terminal and included in registration information transmitted from the operation terminal, to determine whether the first authentication information and the second authentication information match with each other. In response to the first authentication information and the second authentication information being determined to match with each other, the operation terminal that has terminal information included in the registration information is successfully authenticated and registered as an operation terminal that is enabled to perform a remote operation of the air conditioning control device.

In a motor driving apparatus including a DC power supply circuit of variable output voltage value, an inverter of variable frequency, and a connection switching device for selecting connection, switching of the connection switching device is performed in a state where an output voltage of the DC power supply circuit is increased, a rotational speed of a motor is increased, and a current flowing through the motor is made not greater than a predetermined threshold. For example, the switching of the connection switching device is performed in a state where the current through the motor is made zero. For example, the switching is performed in a state where the output voltage of the DC power supply circuit is set at a value corresponding to the rotational speed of the motor during the switching. It is possible to prevent increase in apparatus size and switch the connection of windings while the motor is rotating.

A predictive controller for building equipment associated with a building includes one or more processing circuits configured to control electric energy used by the building equipment. The building equipment includes an electric energy using component. The one or more processing circuits are configured to utilize a predictive cost function to determine a first amount of the electric energy supplied from an energy grid source and a second amount of the electric energy supplied from a second energy source to the electric energy using component.

An HVAC controller is configured to receive signals from a plurality of sensors positioned in different spaces. The HVAC controller includes a controller that is configured to display one or more screens on a user interface that include a home screen including a selectable display element that indicates a number of the plurality of sensors that are currently being used by the controller in controlling the HVAC system. Upon selection of the selectable display element, the controller displays a sensor priority screen that includes a plurality of graphic constructs that each identify a building space and a current temperature for that building space. The controller is configured to control the HVAC system in accordance with the current temperature reported by each of the number of the plurality of sensors that are currently being used by the controller in controlling the HVAC system.

An HVAC controller is configured to receive signals from a plurality of sensors positioned in different spaces. The HVAC controller includes a controller that is configured to display one or more screens on a user interface that include a home screen including a selectable display element that indicates a number of the plurality of sensors that are currently being used by the controller in controlling the HVAC system. Upon selection of the selectable display element, the controller displays a sensor priority screen that includes a plurality of graphic constructs that each identify a building space and a current temperature for that building space. The controller is configured to control the HVAC system in accordance with the current temperature reported by each of the number of the plurality of sensors that are currently being used by the controller in controlling the HVAC system.

A network of wireless remote climate sensors in a heating, ventilation, and air conditioning (HVAC) system permits the creation of personalized microclimates within an enclosed space. In addition to collecting temperature and humidity data, the wireless remote climate sensors can detect whether the enclosed space is occupied by a human. Human detection is made possible by optional cameras, microphones, and gas sensors on the wireless remote climate sensors. As the human moves throughout the enclosed space, the HVAC system is able to track the human's movement using the wireless remote climate sensors. The HVAC system may adjust airflow to different portions of the enclosed space based on the human's location. The result is an efficient use of system resources to keep users at their ideal temperature.

A network of wireless remote climate sensors in a heating, ventilation, and air conditioning (HVAC) system permits the creation of personalized microclimates within an enclosed space. In addition to collecting temperature and humidity data, the wireless remote climate sensors can detect whether the enclosed space is occupied by a human. Human detection is made possible by optional cameras, microphones, and gas sensors on the wireless remote climate sensors. As the human moves throughout the enclosed space, the HVAC system is able to track the human's movement using the wireless remote climate sensors. The HVAC system may adjust airflow to different portions of the enclosed space based on the human's location. The result is an efficient use of system resources to keep users at their ideal temperature.

Devices, methods, and systems for determining the cause of a fault in a heating, ventilation, and air conditioning (HVAC) system are described herein. One device includes a memory, and a processor configured to execute executable instructions stored in the memory to receive operational data associated with an HVAC system, receive control logic associated with a controller of the HVAC system, determine a cause of a fault occurring in the HVAC system based, at least in part, on the operational data associated with the HVAC system and the control logic of the controller of the HVAC system, and provide the cause of the fault occurring in the HVAC system to a user.