| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot water supply system for suppressing useless power consumption without losing data stored in a RAM of a hot water supply device while strictly keeping the guaranteed number of writing in a nonvolatile memory. SOLUTION: A control part 11 of each hot water supply device 1 stores accumulation data for control of the hot water supply device 1 as needed in the RAM of the hot water supply device 1 and performs writing processing in the nonvolatile memory of the hot water supply device 1 at fixed time intervals. A control part 21 of a system controller 2 includes a structure for energizing/cutting off a main power supply of the hot water supply device 1 in a stand-by status when a prescribed condition is satisfied. The control part 21 obtains the accumulation data for control stored in the RAM of the hot water supply device 1 and stores it in a RAM of the control part 21 immediately before cutting off the main power supply of the hot water supply device 1 in the stand-by status. Meanwhile, when the main power supply of the hot water supply device 1 is energized, the accumulation data for control stored in the RAM of the control part 21 is transmitted back to the hot water supply device 1. COPYRIGHT: (C)2010,JPO&INPIT
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