2N Lift emergency phone 2N LiftNet - Manual, 1446 v1.8.3 - Manual (Page 84)

Battery Maintenance 5.1
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5.1 Battery Maintenance
First put the accumulators in operation as described in the Description and Installation
section (PSTN Central Unit, Before You Start). Also, pay attention to them whenever
the operation is interrupted and during replacement. The basic rules are as follows:
Warning
 Never leave the batteries discharged for unnecessarily long periods.
 If the battery is fully discharged, please recharge it as soon as possible.
Interruption of Operation
The interruption of service means that LN is without a power supply for a rather long
time. The battery is not being charged and can be damaged. This situation may occur
in the following cases:
 In a building under construction or in an unused building where the power
supply may be turned off for weeks or even months;
 While replacing the CU;
 At the end of a testing, exhibition or similar event.
In such cases, open the CU and remove the battery or disconnect it placing the
transport tape between the battery contact and the holder contact.
List of Battery Endangering Situations
1. CU installation in an unfinished new building.
Remember that the power may be switched off for weeks or even months in a
building that has not been put in operation yet. If necessary, install the
communicator here, check its function and remember to protect the batteries
against depletion – remove them or disconnect using the transport tape. If the
risk is not so high, just disconnect the green connector. Both the steps,
however, may only be performed when the elevators are out of operation.
2. Excessively long storage periods.
Make sure that your storage obeys the FIFO (first in first out) principle. If the
end of the six-month storage period is approaching, you may recharge the
batteries in the product (see above), replace the transport tape and continue
storing the product.
3. Dismantling CU.
If, for whatever reason (warranty claim, transport to service site in order to
upgrade, etc.), you dismantle the CU, remember that the CU is still “working”.
This way it may be stored without recharging for no longer than 1 week, or,
after having been fully recharged, no longer than 1 month. If there is a risk of
exceeding this period, remove the batteries or disconnect them using the
transport tape.
4. Testing, exhibitions and presentations.
If you operate the communicator for example at an exhibition, remember that
the entire set may be disconnected from the power supply. In such case the