Method and system for diagnosing a cooling system
AssigneeCopeland Corporation
InventorsNagaraj Jayanth, Hung Pham
Life of this patent
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Abstract
A cooling system includes a compressor having a motor protector which stops the compressor's motor when it senses an out of specification condition. A diagnostic system of the cooling system monitors the status of the motor protector. The diagnostic system includes logic circuitry that diagnoses the type of problem the compressor or the system is having based upon the running times and status of the motor in conjunction with the times and status of the tripped motor protector. The diagnostic system also includes either a discharge pressure sensor or a condenser temperature sensor, an ambient air sensor and a voltage sensor. The sensors provide information to the diagnostic system to enable it to determine and indicate a system fault.
Claims36
A cooling system comprising:
- a compressor;
- a motor attached to said compressor for powering said compressor;
- a motor protector associated with said motor and actuable between a first position when said motor is within specified operating parameters and a second position when said motor is outside of said specified operating parameters;
- and
- a diagnostic system associated with said motor protector and operable to diagnose the cooling system problem based upon a status of said motor protector.
Dependencies are inferred from the claim text.