| 摘要 |
PROBLEM TO BE SOLVED: To secure fail-safe in controlling a refrigeration storage shed using a plurality of control devices. SOLUTION: A sub-control device 36 transmits storage room temperature data detected by a storage room temperature detecting means to a main control part 37, and according to the refrigeration control data transmitted from the main control device, the control for a refrigeration unit is performed. A preset temperature data transmitted from the main control device is retained, whereby when the refrigeration control data can not be received from the main control device, according to the retained preset temperature data and the storage room temperature data, the control for the refrigeration unit is performed. COPYRIGHT: (C)2004,JPO
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