Abstract: A cooling system includes a compressor rack having a plurality of compressors and a controller associated with each compressor. Each controller is associated with a communication gateway and monitors operational characteristics of its respective compressor and communicates with an internet web server through the gateway.

Abstract: The compressor assembly includes a compressor and a controller mounted on the compressor and operable to monitor operational characteristics of the compressor. The controller also controls the compressor unloader, liquid injection, oil injection and/or a crankcase heater.

Abstract: A compressor assembly includes a compressor, a controller, a gateway and a system controller. The controller includes a vibration sensor and monitors operational characteristics of the compressor. The gateway is in communication with the controller, the system controller is in communication with the controller through the gateway.

Abstract: A cooling system includes a compressor rack, a controller, a gateway, and a system master. The compressor rack includes a plurality of compressors. A controller is dedicated to each compressor and includes a memory storing configuration data for the compressor. A gateway is in communication with each controller and allows the system master to command the controller to send the configuration data to the system master, whereby the system master stores a copy of the configuration data for each compressor.

Abstract: A compressor includes a motor protector which stops the compressor's motor when it senses an out of specification condition. A diagnostic system monitors the status of the motor protector. The diagnostic system includes logic circuitry that diagnoses the type of problem the compressor is having based upon the running times and status of the motor in conjunction with the times and status of the motor protector.

Abstract: An improved liquid level sensor is disclosed which provides a reliable and simple device for accurately determining the level of a liquid within a vessel. The sensor of the present invention utilizes a plurality of thermocouples grouped in pairs with the pairs being spaced along a line extending generally in the direction in which the liquid level may vary. A first thermocouple of each pair is located in relatively close thermal proximity to an electrically powered heater and the second of each pair of thermocouples is spaced away from the heater. The thermocouples are connected in series and produce a signal directly indicative of the level of the liquid along the sensor. Additionally, a pressure sensing circuit may also be incorporated with the liquid level sensor.

Abstract: A compressor includes a motor protector which stops the compressor's motor when it senses an out of specification condition. A diagnostic system monitors the status of the motor protector. The diagnostic system includes logic circuitry that diagnoses the type of problem the compressor is having based upon the running times and status of the motor in conjunction with the times and status of the motor protector.

Abstract: An improved liquid level sensor is disclosed which provides a reliable and simple device for accurately determining the level of a liquid within a vessel. The sensor of the present invention utilizes a plurality of thermocouples grouped in pairs with the pairs being spaced along a line extending generally in the direction in which the liquid level may vary. A first thermocouple of each pair is located in relatively close thermal proximity to an electrically powered heater and the second of each pair of thermocouples is spaced away from the heater. The thermocouples are connected in series and produce a signal directly indicative of the level of the liquid along the sensor. Additionally, a pressure sensing circuit may also be incorporated with the liquid level sensor.

Abstract: A compressor protection and control subsystem for a rotary compressor provides temperature pressure, mis-wiring and vibrational protection for the scroll machine. The vibrational protection comprises a vibration sensor which is integrated on the circuit board of the protection and control subsystem. The vibration sensor, in conjunction with at least one timer, monitors the vibrations of the scroll machine and will shut down the machine when excess vibrations are sensed over a prespecified period of time. The temperature system monitors operating temperature conditions the pressure system monitors operating pressures and the mis-wiring system monitors the power supplied to the compressor. Once an undesirable characteristic is identified, the operation of the scroll machine is stopped. These protection systems are integrated into a single subsystem which identifies the reason of shutting off the scroll machine in order to simplify repairs needed.

Abstract: A compressor protection and control subsystem for a rotary compressor provides temperature pressure, mis-wiring and vibrational protection for the scroll machine. The vibrational protection comprises a vibration sensor which is integrated on the circuit board of the protection and control subsystem. The vibration sensor, in conjunction with at least one timer, monitors the vibrations of the scroll machine and will shut down the machine when excess vibrations are sensed over a prespecified period of time. The temperature system monitors operating temperature conditions the pressure system monitors operating pressures and the mis-wiring system monitors the power supplied to the compressor. Once an undesirable characteristic is identified, the operation of the scroll machine is stopped. These protection systems are integrated into a single subsystem which identifies the reason of shutting off the scroll machine in order to simplify repairs needed.

Abstract: A protection system for a scroll machine provides temperature, mis-wiring and vibrational protection for the scroll machine. The vibrational protection comprises a vibration sensor which is integrated on the circuit board of the protection system. The vibration sensor, in conjunction with at least one timer, monitors the vibrations of the scroll machine and will shut down the machine when excess vibrations are sensed over a prespecified period of time. The temperature system monitors operating temperature conditions and the mis-wiring system monitors the power supplied to the compressor. Once an undesirable characteristic is identified, the operation of the scroll machine is stopped. These protection systems are integrated into a single module which identifies the reason of shutting off the scroll machine in order to simplify repairs needed.

Abstract: Liquid refrigerant temperature, measured by a sensor adjacent the flow control device, provides multiple diverse pieces of information which are used to control the indoor fan speed. liquid refrigerant temperature is used as an indication of outdoor air temperature and is also used as an indication of whether the compressor is operational or not.