300 Z/ZP 2
Malfunctions – diagnosis – repair
BL144 GB 2019-11
99
Action 2: Self-rescue using the EMERGENCY descent function.
Triggering of the safety gear
In order to prevent the safety gear engaging, the brake release
lever has to be operated with extreme caution. Once the safety
gear has engaged, the platform can no longer be moved and has
to be lifted. See chapter 5.3.3 Platform moved too low
The EMERGENCY descent function is used only in an emergency
to reach the next lower landing level. Persons trapped may be able
to evacuate themselves in this way.
It must not be used for lowering the platform during operation!
The Brake Indicator label will be damaged during emergency
release and has to be replaced after checking the motor brake!
Release the motor brake by carefully
pushing (upwards) on the brake
release lever (1) in a controlled
manner.
The platform glides downwards.
Fig. 67: Pressing the brake release
lever
CAUTION
The brake becomes very hot and loses braking power
Interrupt the lowering process for 2 min after every 1 - 2 m at the latest. The
length of a mast section can be used for orientation.
When at the next landing level, release the brake release lever.
Stop so that the floor of the platform is slightly above the sill of the
landing level safety gate.
Exit the platform.
It is not possible to lower the platform by releasing the motor
brakes if e.g. the safety gear has been triggered.