Maintenance - Andrew Node C837 User Manual

6 Maintenance

6 MAINTENANCE
6.1 GENERAL
Read the health and safety warnings in chapter 1.2 Health and Safety Warnings.
Note: The Node C does not require any preventative maintenance
measures.
It is only recommended to replace the battery pack of the battery backup option after
two years of usage as a preventive measure. The nominal lifetime of the battery pack
is approx. two years under normal environmental conditions.
In the event of a malfunction, the user should check the status of the antennas,
feeder cables, connectors, and mains power before replacing any components.
6.2 REPLACEMENT OF COMPONENTS
Read the health and safety warnings in chapter 1.2 Health and Safety Warnings.
Maintenance of the Node C should be performed on a FRU (Field Replaceable Unit)
basis only. Do not damage the warranty labels on the components, as this voids the
warranty.
The spare parts list contains only units that can be replaced without tuning or
complex soldering work. Those units are all components of the Interface Unit. Do not
replace any components inside the Node C itself.
Note: Defect parts should only be replaced by original parts from the
supplier. All interventions inside the housing are at one's own risk.
Note: During maintenance ensure that the unit has been disconnected
from mains.
To open the cabinet of the Interface Unit, observe the instructions in chapter 4.1
General.
Note: If the optional battery backup is installed, disconnect the battery
cable from the charge module connector as described in chapter
5.4.1.3 Battery Backup, to ensure that all circuits are voltage-free.
Note: Before disconnecting any cables, label any unlabeled cables to
ensure correct reconnection, and check the switch positions of the
removed part to set the switches of the new part accordingly.
To replace a FRU, use the appropriate tools. The tools are provided along with the
equipment. Replacement tools may be ordered from the supplier. All screws have a
right-hand thread, turn the tool clockwise for tightening and counter-clockwise for
loosening.
ID No: 161692 PRELIMINARY Page 87