2N Lift emergency phone 2N LiftNet - Manual, 1446 v1.8.3 - Manual (Page 22)

PSTN Central Unit 2.1
22
a. Weak and short green flashing
The battery is OK and fully charged, you may continue with the
installation. If the product was stored for longer period than ½ year, or
under temperature exceeding 25 °C proceed according to paragraph b.
Caution
 The product needs to be put in operation after the tape
has been removed.
It can be stored no longer than one week without charging; after having
been fully charged no more than 1 month.
b. Weak and short red flashing
Some battery cells are discharged. In such case connect the 12V DC
power adapter (do not connect any audio units!) and let the CU charge
for at least 24 hours, even after the indicator has starting showing that
the battery is charged. This is a so-called compensatory cycle, which
balances out the condition of the individual cells after a long period of
storage.
c. No flashing
The battery is fully depleted and may be damaged. Replace the battery
with a new recommended type (SANYO Eneloop 2000).
4. You may now install the CU.
CU Mounting
It is recommended to install the CU in a room that is secured against unauthorised
persons, such as the lift machine room, switching station etc. On an easily accessible
place there is a risk of telephone line misuse or SIM card misappropriation (in the GSM
version).
Mount the CU onto a wall using the attached dowels and screws.
CU Connection
Supply
Use the included adapter or a 12V DC power supply with appropriate parameters
(stabilised).
Warning
 Never use an AC or non-stabilised DC power supply to avoid CU
damage.