| 摘要 |
PROBLEM TO BE SOLVED: To provide a water supply device capable of continuing operation without causing inconvenience for a user of a customer even if abnormality is caused in a base board for controlling inverters. SOLUTION: This water supply device 1 has a plurality of pumps 3, a plurality of inverters 5 for variably controlling a rotational frequency of the corresponding pump, and a control part 6 for controlling the plurality of inverters 5. The control part 6 has a plurality of control base boards 60a and 60b capable of respectively and independently controlling the plurality of inverters 5, and controls the plurality of inverters 5 by backing up by the standby other control base board 60b or 60a when the abnormality is caused in one control base board 60a or 60b in operation. COPYRIGHT: (C)2006,JPO&NCIPI
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