Modem / Battery - CommScope Node AM4 Manual

5. Maintenance

5.2.2. Modem / Battery

1. Caution: Electrolyte inside. Risk of health hazards associated with electrolyte
leakage. Do not disassemble, puncture, modify, drop, throw, or cause other
unnecessary shocks to batteries.
2. Caution: High current if shorted. Risk of injury by high current. Do not short circuit the
batteries.
3. Caution: The batteries might be hot. Risk of burns by hot surface. Do not touch the
batteries before they have sufficiently cooled down.
Do not put the batteries to the garbage but dispose of them properly according local
and/or regional regulations.
Notice:
Currently, the battery condition is only detected at shutdown, by making sure the battery
has enough charge to allow a complete shutdown process. If the battery is dead,
missing, or not able to hold a charge lasting more than a minute or two (the time for a
normal shutdown, which could be up to 10 minutes), this will be noticed by the software
at the next power up and an alarm raised. However, this means a "good" battery
condition can also only be detected at shutdown. If a bad battery is replaced with a good
battery in the field, the alarm will not be cleared immediately at the next bootup. Instead
the system will have to have a normal power shutdown and then the alarm will be cleared
at the following bootup. So, the procedure for replacing a failed battery should be:
1. Shutdown the system.
2. Replace the battery.
3. Power up (alarm will still be raised).
4. Shutdown the system.
5. Power up (alarm will now be cleared).
If this is not done, the alarm will be only cleared after the next shutdown and power up
event of the system.
button on the UI1 board is pressed and the unit is powered up again. To delete the false
alarm, the unit has to be shut down and powered up again. During the shutdown, the
battery disconnect button must not be pressed.
Notice: For the replacement procedure, also observe the warnings in chapters 5.1 and
5.2.1.
For tightening
Notice:
SMA connectors, always
use an appropriate torque
wrench:
Modem and battery are located on a carrier plate located behind the combiner carrier
plate. Thus, for replacing the modem or the battery, the combiner has to be removed
first. To do so refer to chapter 5.2.1, observing the corresponding warning messages.
MF0121ACP_uc.docx
Also, observe that an alarm is raised once the battery disconnect
Manual for Node AM4 Page 57