User's Manual

Table Of Contents
DIB-500 R4.1 Component replacement
Replacing the LRU – optional (redundancy package)
188 Installation, Operation and Service Manual 90DIB500R41IM_FCC02 99.1
Resistance when pulling out the fan insert
Slight resistance will be noticed when pulling out the fan insert. Pull the fan insert out
further to disconnect the voltage supply connector.
2. Cautiously pull out the fan insert to the front along the holder.
You have successfully removed the fan insert.
11.5.2.2 Installing the fan subrack
The voltage supply connector will be reconnected when the fan insert is installed. Sub-
sequently, the fan will start automatically.
Proceed as follows to install the fan insert:
Preparation:
The tools and aids must be available, refer to section 11.2.3 on page 173.
You need the mounting screws removed with the component.
Carry out the following steps:
1. Slide the fan insert in from the front along the holder.
The fan will start automatically.
2. Reattach the fan insert to the front of the equipment rack. Use a Torx screwdriver
size TX20 for this purpose.
You have successfully installed the fan insert.
11.6 Replacing the LRU – optional (redundancy package)
For variants with redundancy package (hybrid and cavity) a LAN switch (LAN routing
unit, LRU) is additionally used optionally to connect the two equipment racks, i.e. the
TIB transceiver modules installed in the racks.
The tasks listed in the following table must be performed for the replacement of the
LRU.
The LRU and the top hat rail power supply unit are installed on a top hat rail and each
fastened by a lock.
Table 11.18 Overview of tasks to be performed (replacing the LRU)
Tasks/work steps Described in
Preparatory measures Temporary service interruption Section 8.1 on page 163
Removing the top cover of the mounting frame Section 5.4 on page 94
Removing the LRU Section 11.6.1 on page 189
Inserting the LRU Section 11.6.2 on page 190
Concluding tasks Mounting the top cover of the equipment rack Section 5.13 on page 129
Recommissioning after a temporary service inter-
ruption
Section 9.1 on page 167