When the BMU is in use, when the electric lift mechanism loses all functions, it can be lifted up and down by the manual operation of the basket. Therefore, even if the basket suddenly loses power during use, it is not necessary to panic, and the operator can safely return. On land, if there is a power outage, the window cleaner equipment can be operated by the following operating procedures, which is done by the roof operator.
1. Turn off the main power switch to avoid accidents when calling.
2. Relax the lift motor brake.
3. Insert the rocking handle into the square shaft end of the lifting mechanism, and operate the rocking handle to realize the hanging basket and the lowering.