| 摘要 |
PURPOSE:To ensure that no faulty operation takes place, even if a user misuses a maintenance check switch at any other time than for maintenance checkup and that a maintenance service personnel may find it easy to do the maintenance checkup routine by providing a maintenance checkup invalidation device which invalidates the operation of each maintenance check switch. CONSTITUTION:A maintenance checkup invalidation device 2 which invalidates the operation of each maintenance check switch 1-1, 1-2,... is provided. If a maintenance service personnel operates each maintenance check switch 1-1, 1-2,... without activation of the maintenance checkup device 2 at the time of maintenance checkup, for example, various types of maintenance checkup service can be performed. On the other hand, if the maintenance checkup invalidation device 2 is activated by the personnel at any other time than for maintenance checkup service, a signal for instruction of maintenance checkup service is output from each maintenance check switch 1-1, 1-2,... due to the faulty operation resulting from the touching of each maintenance check switch 1-1, 1-2,... by mistake by the user. Subsequently, the triggering of a faulty action or the breakdown of internal information due to the misuse of each maintenance check switch 1-1, 1-2,... by mistake by the user at any other time than for maintenance checkup service, can be prevented. |
