What's wrong with the brake coil of Tianao elevator?

1. power failure: the lack of power in the brake coil is caused by power failure, such as an open switch and a blown fuse.

2. Line fault: The power shortage of the brake coil is caused by line fault, such as short circuit and poor contact.

3. Failure of the brake coil itself: If there is no problem with the power supply and wiring, the problem lies in the brake coil itself, that is, the winding of the coil is burnt out, the coil joint is loose or the coil lead-out terminal is damaged.