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Sigma | User Manual Version 09/2022 Page 9
4.8 Battery charging system
The drive motor of your platform lift is powered by batteries, which are charged via a charger. The
charging is permanent (also while driving).
If the platform lift is not charged, the lift will emit a short beep every second after 5
seconds. Check that the lift or the charger is connected to the mains. Turn off the main
switch on the back of the platform (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 at the rear of the
platform. 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. If the charger is connected and the lift still
beeps during travel even after charging the batteries, the batteries are defective. The
batteries must now be replaced by the service department. If the platform lift continues
to operate despite weak batteries, the control is programmed so that the platform will
reach the lower landing in any case with the remaining battery voltage.