User's Manual

Table Of Contents
Installation, Operation and Service Manual 90DIB500R41IM_FCC02 99.1 187
DIB-500 R4.1 Component replacement
Replacing fan unit constituents
11.5.2 Replacing the fan subrack
The fan insert is suspended on a mounting rail in the equipment rack and secured to the
front of the equipment rack with two mounting screws.
The fan insert can be replaced during operation. In this case, the replacement should
be performed fast. Otherwise the TIB transceiver modules may switch off automatically
as a factor of the ambient conditions.
Risk of overheating
During the operation without fan subrack, it is possible that the corresponding TIB trans-
ceiver module will overheat and be damaged.
Ensure that you install the new fan subrack immediately following the removal.
The tasks listed in the following table must be performed for the replacement of the air
filter pad.
11.5.2.1 Removing the fan subrack
The fan insert is equipped with a voltage supply unit. The voltage supply connector (D-
Sub) is on the rear of the fan insert.
Proceed as follows to remove the fan insert:
Preparation:
Ensure that the replacement component is available in its area of use.
The tools and aids must be available, refer to section 11.2.3 on page 173.
Carry out the following steps:
1. Loosen the mounting screws of the fan insert using a Torx screwdriver size TX20 x
80, refer to Figure 11.8.
Figure 11.8 Fan insert mounting screws
Table 11.17 Overview of the tasks to be performed (Replacing the air filter pad)
Tasks/work steps Described in
Removing the fan subrack Section 11.5.2.1 on page 184
Installing the fan subrack Section 11.5.2.2 on page 188