Patent ID: 9206590
Filing Date: 2015-12-08
Classification: E03C,F04B,F04D,G05B,Y10T

Abstract:
1. A water supply apparatus, comprising: a plurality of pumps; a plurality of motors configured to drive said plurality of pumps; a plurality of inverters each configured for variable rotational speed control of a corresponding one of said plurality of motors; and a first control board and a second control board each configured to control said plurality of inverters, wherein when an abnormality occurs in said first control board, said second control board backs up said first control board to thereby allow said water supply apparatus to continue its operations, wherein each of said plurality of inverters is provided with at least two different communication ports, and wherein said first control board is connected to said plurality of inverters in series by communication lines and said second control board is connected to said plurality of inverters in series by different communication lines.