| 摘要 |
PROBLEM TO BE SOLVED: To prevent a fault by measuring an operating state of a refrigerator, comparing the measured data with set data previously set in a centralized control device, predicting a fault of the refrigerator, and generating a fault predicting alarm. SOLUTION: A plurality of refrigerator measuring controllers 4a to 4c input measured data of a refrigerant liquid temperature, a suction temperature, a discharge temperature, a high pressure, a low pressure and start or stop state of the refrigerator to be measured by the temperature sensor, a refrigerant input/output unit and a gas pressure sensor installed in a plurality of refrigerators 5a to 5c, and output the measured data to a untralized control device 1 through a communicating transmission line 6 at each one minute according to a request from the device 1. The measured data are calculated by a formula for calculating a saturated temperature preset in the device 1, compared with set data item as a reference for conducting a prior alarm. Thus, if the data exceeds the set value, it is judged that the data is abnormal, and a fault predicting alarm is outputted. |
