| 摘要 |
PROBLEM TO BE SOLVED: To prevent erroneous dispatch of service man by providing a control circuit for controlling the output signal from a controller to an alarm to turn off even upon occurrence of an abnormal situation thereby blocking previous notification to the service side when an abnormal situation is occurred intentionally on the showcase side. SOLUTION: When an abnormal situation occurs in a showcase 10, an abnormality data is transmitted from a controller on the showcase 10 side and received by a receiving circuit 1 on the central management system side. A controller 3 reads in that abnormality data and fetches a date data from a calendar timer 2 and then both data are stored in a memory circuit 4. An alarm 6 is then actuated and a service man is dispatched. When an abnormal situation is generated intentionally at the time of maintenance, for example, a control setter 8 sets a control circuit 7 to control the output signal from the control circuit 3 such that the alarm 6 is not actuated even it an abnormality is informed from the showcase 10 side. |
