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Dumbwaiter are considered as the smallest member in the elevator family. According to the different usage occasions, they can be called as service lifts, food conveying, elevators, catering elevators or multi-purpose dumbwaiter. At present, there has been perfect product series, floor type and window type dumbwaiters are matched with three different opening methods.
| Function Name | Function Description |
| Floor Display | Numeral display of landing floor |
| Open or Closed State display of the door | Open the door when the dumbwaiter is landing, light display should notice the door is opened |
| Landinfg notice buzzer | Buzzer will ring when the cabin reaches the apponited floor |
| Key switch | Main Landing is quipped with key switch board to start or shut the control circuit |
| Calling response | Press the calling button, the number of the floor called will be lighted and keep shining until the car landing |
| Running Direction Display | Running direction is diplayed shinning arrow |
| Overtime Running Protection | When the dumbwaiter run time exceeds the normal time 10s, the traction machine circuit will be cut off, the dumbwaiter id stopped to prevent the motor broken |
| Contactor conglutination or locked protection | When the contactor can't activate or release normally, the dumwaiter can't be started again to ensure safety |
| Trouble self diagnosis | When the dumwaiter has something wrong, the display board will display the possible trouble with special signal |
| Emergency Stop Switch | It can't cut off the control circuit to let the dumbwaiter stop when there are some emergencies |
| Wrong or Short phase protection | If the 3 phases power supply has wrong or short phase, it can prevent the motor broken |
