Abstract: A motor control having mechanical switching and pressure reponsive components for connecting and intercepting a circuit between an A.C. source and an A.C. motor in response to pressure changes in a pressure system. The control includes a microcomputer chip and components that detect a voltage across the motor and a current through the motor and provide signals indicative of the level of the motor voltage and current. The control in response to the signals determines the power factor of the current and in response to the detected signals protects the motor from operating malfunctions when the voltage is too high or low, the current is too high or too low, the time of operation of the motor is too long or too short and in response to the character of the malfunction provides a visual coded lamp indication of the cause of the malfunction.

Abstract: A pressure switch having mechanical and solid state components enclosed within a common cover. The mechanical components and the cover are secured to a support. The mechanical components include a snap acting switch having terminals connected to an alternating current source and an alternating current motor and a diaphragm that operates the snap switch in response to pressure changes in a fluid system. The cover includes a dividing wall that separates an internal cavity within the cover into two chambers with a rear chamber providing an enclosure for the mechanical components and the front chamber providing an enclosure for the solid state components that include means for detecting the motor current and voltage and a microcomputer. The dividing wall has spaced openings for connectors that provide a separable electric connection between the terminals in the rear chamber and the solid state components in the front chamber.