Air-cleaning control is performed in accordance with a situation of motion of a person and brightness in a room. An air-cleaning device (100) includes: a first determination unit (11) that determines, from a detection signal from a person detection sensor (31), whether a state of an air-cleaning target room is at least any of a state where a person is absent in the air-cleaning target room, a state where a person is present and a motion amount is small, and a state where a person is present and the motion amount is large; a second determination unit (12) that determines, from a detection signal from as illuminance sensor (32), whether the state of the air-cleaning target room is at least any of a state where it is bright inside the air-cleaning target room and a state where it is dark inside the air-cleaning target room; and an operation control unit (13) that controls an operation of an air-cleaning function by using determination results of the first determination unit (11) and the second determination unit (12).

Air-cleaning control is performed in accordance with a situation of motion of a person and brightness in a room. An air-cleaning device (100) includes: a first determination unit (11) that determines, from a detection signal from a person detection sensor (31), whether a state of an air-cleaning target room is at least any of a state where a person is absent in the air-cleaning target room, a state where a person is present and a motion amount is small, and a state where a person is present and the motion amount is large; a second determination unit (12) that determines, from a detection signal from as illuminance sensor (32), whether the state of the air-cleaning target room is at least any of a state where it is bright inside the air-cleaning target room and a state where it is dark inside the air-cleaning target room; and an operation control unit (13) that controls an operation of an air-cleaning function by using determination results of the first determination unit (11) and the second determination unit (12).

An HVAC controller provides control values to or more output ports of the HVAC controller. Operation of the HVAC controller is monitored for one or more irregularities. When one or more irregularities in the operation are identified, a hold mode is entered. The hold mode includes holding the one or more current control values on the one or more output ports of the HVAC controller until the one or more irregularities in the operation of the HVAC controller are corrected or a predetermined hold time expires, whichever occurs first. When the one or more irregularities in the operation of the HVAC controller are not corrected before the predetermined hold time expires, a back off mode is entered. The back off mode includes setting each of one or more control values on one or more output ports of the HVAC controller to a corresponding configurable back off value.

An HVAC controller provides control values to or more output ports of the HVAC controller. Operation of the HVAC controller is monitored for one or more irregularities. When one or more irregularities in the operation are identified, a hold mode is entered. The hold mode includes holding the one or more current control values on the one or more output ports of the HVAC controller until the one or more irregularities in the operation of the HVAC controller are corrected or a predetermined hold time expires, whichever occurs first. When the one or more irregularities in the operation of the HVAC controller are not corrected before the predetermined hold time expires, a back off mode is entered. The back off mode includes setting each of one or more control values on one or more output ports of the HVAC controller to a corresponding configurable back off value.

A damper inspection system for a heating, ventilating, and air conditioning (HVAC) system includes a fuse link sensor configured to couple to a damper. The fuse link sensor includes a first contact and a second contact. The fuse link sensor is configured to transition between an engaged configuration in which the first contact is electrically coupled to the second contact and a disengaged configuration in which the first contact is electrically decoupled from the second contact. The damper inspection system includes a remote controller that includes control circuitry configured to electrically couple to the first contact and the second contact and to determine an operational status of a fuse link of the damper based on an electrical continuity between the first contact and the second contact.

A damper inspection system for a heating, ventilating, and air conditioning (HVAC) system includes a fuse link sensor configured to couple to a damper. The fuse link sensor includes a first contact and a second contact. The fuse link sensor is configured to transition between an engaged configuration in which the first contact is electrically coupled to the second contact and a disengaged configuration in which the first contact is electrically decoupled from the second contact. The damper inspection system includes a remote controller that includes control circuitry configured to electrically couple to the first contact and the second contact and to determine an operational status of a fuse link of the damper based on an electrical continuity between the first contact and the second contact.

A method for determining the positions of a number of fans (V.sub.n,m) for generating an air flow in a preferably enclosed space. The fans (V.sub.n,m) have an acceleration sensor to determine their position. The fans (V.sub.n,m) are arranged in rows (R.sub.1, R.sub.2, . . . , R.sub.n) and columns (S.sub.1, S.sub.2, . . . , S.sub.m). At least the position (i, j) of one fan (V.sub.i,j) is known.

A method for determining the positions of a number of fans (V.sub.n,m) for generating an air flow in a preferably enclosed space. The fans (V.sub.n,m) have an acceleration sensor to determine their position. The fans (V.sub.n,m) are arranged in rows (R.sub.1, R.sub.2, . . . , R.sub.n) and columns (S.sub.1, S.sub.2, . . . , S.sub.m). At least the position (i, j) of one fan (V.sub.i,j) is known.

An asset inventory for a site location is conducted by providing a user with a mobile interface, collecting a site ID, collecting an equipment ID, collecting equipment asset information, associating the equipment ID and equipment asset information with the site ID, and storing the equipment asset information, equipment ID, and site ID in one or more data repositories. Site surveys are conducted based on a system comprising a server, one or more data repositories, a mobile data interface, a network, and a series of rules corresponding to service and maintenance of site equipment.

An asset inventory for a site location is conducted by providing a user with a mobile interface, collecting a site ID, collecting an equipment ID, collecting equipment asset information, associating the equipment ID and equipment asset information with the site ID, and storing the equipment asset information, equipment ID, and site ID in one or more data repositories. Site surveys are conducted based on a system comprising a server, one or more data repositories, a mobile data interface, a network, and a series of rules corresponding to service and maintenance of site equipment.