Emerson Retail Services Inc.

Computer Process Controls, Inc.

Albert W Maier

Richard P Vogh, Iii

Timothy D Campbell

John R Aggers

Scott Michael Gelber

Robert A Kensinger

Matthew H Lattanzi

Richard P Iii Vogh

A method includes cycling an electronic evaporator pressure regulator valve fluidly coupled to a refrigeration circuit to regulate flow through the electronic evaporator pressure regulator valve and sensing a current drawn by the electronic evaporator pressure regulator valve during cycling of the electronic evaporator pressure regulator valve. The method further includes determining a valve condition of the electronic evaporator pressure regulator valve based on the sensing.

Evaporator pressure regulator control and diagnostics

An apparatus for refrigeration system control includes a plurality of circuits, each circuit having at least one refrigeration case and an electronic evaporator pressure regulator in communication with each circuit. Each electronic evaporator pressure regulator controls a temperature of one of the circuits. A sensor in communication with each circuit measures a parameter from the circuit. A controller associated with each electronic evaporator pressure regulator controls the respective electronic evaporator pressure regulator based upon measured parameters from each of the circuits.

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St. Charles, MO, United States of America

Albert W Maier