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What is the fault of Guangdong United Elevator 1 13?

The motor of Guangdong United Elevator 1 13 is damaged.

Because the number of encoder pulses detected by the main control unit during elevator operation is too small. The control system gives the signal to open the door, and it is necessary to check the door interlock circuit. The motor of Guangdong United Elevator 1 13 is damaged.

Guangdong, referred to as Guangdong for short, is the capital of Guangzhou, a provincial administrative region of People's Republic of China (PRC).