2N Lift emergency phone 2N LiftNet - Manual, 1446 v1.8.3 - Manual (Page 26)

PSTN Central Unit 2.1
26
Interruption of Operation, Battery Maintenance
Caution
 Never leave the batteries discharged for unnecessarily long periods.
 If the battery is fully discharged please recharge it as soon as possible.
For a detailed description of situations that require your attention due to the state of
accumulators during interruption refer to the Maintenance section. Remember that
the state of accumulators is essential for system operation in any case. The
Maintenance section also contains instructions for accumulator maintenance, including
replacement.