Lehner Lifttechnik ALPHA, User Manual, Page: 14 / 34

Alpha | User Manual Version 09/2022 Page 10
4.8 Battery charging system
The drive motor of your Alpha stairlift is powered by batteries which are charged via a charger.
Charging takes place at each stop via charging contacts. When the stairlift is not in use, it is therefore
necessary to always park the stairlift in the landing.
To prevent accidental parking outside a loading bay, an acoustic signal has been installed in the
stairlift:
4.8.1 The beeper
If the stairlift does not park exactly on the loading point after use, the lift will give a short
beep every second after 5 seconds. Then please move the lift to a stop (where it will also
stop automatically) and the beep will stop.
If the stairlift parks correctly in the charging position and the lift starts to beep briefly
every second, this means that the battery charging process has been interrupted. Turn
off the main switch on the stairlift (the lift will stop beeping) and check if there is a power
failure in your building or if the fuse or RCD in the stairlift power supply circuit is not in
order. Replace the fuse or switch on the RCD and then the main switch. If the lift continues
to beep, please call the service department, it could be that the battery charger is faulty.
If the battery voltage for the travel drive of the lift becomes too low, a long beep sounds
every 2.5 seconds while the lift is travelling. Drive the vehicle to the charging station,
where the batteries will recharge. If the lift beeps while driving even after charging the
batteries, the batteries are defective. The batteries must now be replaced by the service
department. If the stairlift continues to operate despite weak batteries, the stairlift control
is programmed so that the stairlift will definitely reach the lower landing with the
remaining battery voltage.