LUBRICATING SYSTEM CONTROL CIRCUIT

LUBRICATING SYSTEM CONTROL CIRCUIT A lubricating system including a fluid distribution system for distribution a lubricating fluid to one or more parts of an operating machine and a control system for controlling the operation of the fluid distribution system is disclosed. The control system generates a system fault signal, which disables the machine being lubricated, a predetermined time period after a fault condition in said fluid distribution system is detected. A fault condition is detected in part by monitoring the output of a low pressure sensor which generates a low pressure fault signal whenever the pressure in the fluid distribution system falls below a predetermined level. Circuitry is provided for ensuring that a system fault signal will not be generated in response to an erroneous low pressure fault signal which may be generated during the initial pressurization of the fluid system. The control system is preferably capable of operating the fluid distribution system in any one of a plurality of modes at the option of the operator of the system.