Provided is a transmission device for transmitting and receiving data through a transmission channel. The transmission device includes a transmission circuit unit configured to transmit data to the transmission channel. When an overcurrent caused by a simultaneous transmission of data to the transmission channel is detected during data transmission, the transmission circuit unit increases an output resistance, which is a resistance value for an output to the transmission channel, to an resistance value corresponding to a characteristic of a facility equipment item that transmits data to the transmission channel at the same time as itself.

Provided is a transmission device for transmitting and receiving data through a transmission channel. The transmission device includes a transmission circuit unit configured to transmit data to the transmission channel. When an overcurrent caused by a simultaneous transmission of data to the transmission channel is detected during data transmission, the transmission circuit unit increases an output resistance, which is a resistance value for an output to the transmission channel, to an resistance value corresponding to a characteristic of a facility equipment item that transmits data to the transmission channel at the same time as itself.

The present disclosure includes techniques that enable a conditioned air system to automatically restore functionality and/or to operate at reduced functionality when a fault is detected, for example, to facilitate reducing likelihood that continuing operation with the fault present will decrease lifespan of the conditioned air system. To facilitate improving operation of the conditioned air system when a fault is present, the control system of the conditioned air system may utilize substitute sensor data and/or adjust its control algorithm. In this manner, the control system may facilitate improving operational reliability and/or availability of the conditioned air system, for example, by adaptively adjusting its operation to enable the conditioned air system to continue operating even when a fault is present, while reducing likelihood that the continued operation will reduce lifespan of the conditioned air system.

The present disclosure includes techniques that enable a conditioned air system to automatically restore functionality and/or to operate at reduced functionality when a fault is detected, for example, to facilitate reducing likelihood that continuing operation with the fault present will decrease lifespan of the conditioned air system. To facilitate improving operation of the conditioned air system when a fault is present, the control system of the conditioned air system may utilize substitute sensor data and/or adjust its control algorithm. In this manner, the control system may facilitate improving operational reliability and/or availability of the conditioned air system, for example, by adaptively adjusting its operation to enable the conditioned air system to continue operating even when a fault is present, while reducing likelihood that the continued operation will reduce lifespan of the conditioned air system.

According to certain embodiments, a thermostat is configured for use in a climate control system. The thermostat is operable to use two-way communication for communicating operational information between the thermostat and at least one rooftop unit (RTU) within the climate control system. For example, the two-way communication comprises sending first operational information to the RTU and receiving second operational information from the RTU. The operational information comprising one or more climate control commands, setpoints, configuration information, diagnostics, and/or sensor data. The thermostat is further operable to operate the climate control system based on the operational information communicated between the thermostat and the RTU.

According to certain embodiments, a thermostat is configured for use in a climate control system. The thermostat is operable to use two-way communication for communicating operational information between the thermostat and at least one rooftop unit (RTU) within the climate control system. For example, the two-way communication comprises sending first operational information to the RTU and receiving second operational information from the RTU. The operational information comprising one or more climate control commands, setpoints, configuration information, diagnostics, and/or sensor data. The thermostat is further operable to operate the climate control system based on the operational information communicated between the thermostat and the RTU.

Internal control devices (41A to 41D) included respectively in air conditioners (10A to 10D) in an air conditioning system (1) are communicably connected one by one correspondingly to external control devices (42A to 42D). Each of the external control devices (42A to 42D) is configured to execute command generating operation of generating an operation command to a corresponding one of the air conditioners (10A to 10D). The external control devices (42A to 42D) constitute an external control system (50). In the external control system (50), one of the external control devices (42A) functions as a master control device configured to execute the command generating operation whereas remaining ones of the external control devices (42A to 42D) other than the external control device (42A) functioning as the master control device function as sub control devices configured not to execute the command generating operation.

Internal control devices (41A to 41D) included respectively in air conditioners (10A to 10D) in an air conditioning system (1) are communicably connected one by one correspondingly to external control devices (42A to 42D). Each of the external control devices (42A to 42D) is configured to execute command generating operation of generating an operation command to a corresponding one of the air conditioners (10A to 10D). The external control devices (42A to 42D) constitute an external control system (50). In the external control system (50), one of the external control devices (42A) functions as a master control device configured to execute the command generating operation whereas remaining ones of the external control devices (42A to 42D) other than the external control device (42A) functioning as the master control device function as sub control devices configured not to execute the command generating operation.

An air conditioner includes a housing having first and second suction ports; a heat exchanger configured to exchange heat with air brought in through the first suction port; a first discharging port configured to discharge the heat-exchanged air; a second discharging port configured to discharge air brought in through the second suction port to be mixed with air discharged from the first discharging port at outside of the housing; a discharging door having a plurality of discharging holes, through which air directed to the first discharging port is discharged out of the housing, and selectively opening the second discharging port by movement operation of the discharging door.

An air conditioner includes a housing having first and second suction ports; a heat exchanger configured to exchange heat with air brought in through the first suction port; a first discharging port configured to discharge the heat-exchanged air; a second discharging port configured to discharge air brought in through the second suction port to be mixed with air discharged from the first discharging port at outside of the housing; a discharging door having a plurality of discharging holes, through which air directed to the first discharging port is discharged out of the housing, and selectively opening the second discharging port by movement operation of the discharging door.