Method and apparatus for preventing the no-load operation of a pump for a liquid supply system

摘要

An apparatus and method for preventing the no-load operation of a pump for a liquid supply system which responds to a sensor signal indicating that insufficient liquid in the supply exists for properly supplying liquid from a supply tank to a reservoir tank is described. The device provides a user indication that the supply tank liquid needs replenishment. Further, the device also detects when the pump supplying liquid from the supply tank to the reservoir tank operates for a period of time longer than a predetermined period of time. The device also provides a user with an indication that such a condition exists.