AEG Protect 1. M Operating Instructions Manual page 17

UPS must be absolutely dry prior to start-up. As a result,
leave it to acclimatise for at least two hours.
♦ Never connect the mains input and the UPS output!
♦ Ensure that no fluids or foreign bodies can penetrate the
housing!
♦ Do not block the air vents of the unit! Make sure, for
example, that children do not insert any objects in the
ventilation openings!
♦ Do not connect household appliances such as hairdryers
to the UPS! Also take care when working with motor
loads. It is essential to avoid back-feeding the inverter,
e.g. if the load is intermittently operated in regenerative
mode.
Danger! Electric shocks!
Even after the mains voltage has been
disconnected, the components within the UPS
remain connected to the battery and can thus
cause electric shocks. It is therefore imperative
to disconnect the battery circuit before carrying
out any maintenance or repair work!
If it is necessary to replace the battery or carry
out maintenance work, this must be done by or
under the supervision of a specialist familiar with
batteries and the necessary safety precautions!
Only authorised persons are allowed in the
vicinity of the batteries!
When replacing the batteries, the following must be observed:
Only ever use identical, maintenance-free sealed lead batteries
with the same data as the original batteries.
Danger! Explosive!
Never throw batteries into open fire.
Never open or damage batteries. (Electrolyte
may leak out and damage skin and eyes. It may
be toxic!)
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