| 摘要 |
PURPOSE:To prevent the shortage of cooling capacity and the reduction of belt life due to the decrease of belt tension by detecting belt tension from a comparison of rotational speed detected in a cooling operation, and warning a user of the decrease of belt tension if the detected value was lower than a set value. CONSTITUTION:The rotational speed Ne of an auxiliary engine 2, detected by a rotational speed sensor 44 in a cooling operation, is put in and the rotational speed Nm of a ferrite motor 7, detected by a ferrite motor rotational speed detecting means 45 in a cooling operation, is then put in. A judgment is made afterward as to whether or not the comparison value Hm/Ne between the rotational speed Ne of the auxiliary engine 2 and the rotational speed Nm of the ferrite motor 7 is greater than a set value, 0.98. If the result of the judgment was YES, the operation is repeated. If the result was NO, a warning lamp 46 is lit up. The occurrence of the shortage of cooling capacity, a sudden reduction of belt life or the squeaking of a belt as was experienced before can be prevented this way. |
