Repairs
28
Building Technologies
FL-III Maintenance and Repair
CPS Fire Safety
08.2012
5.2
Repairs on the closed controller
5.2.1
Replacement of the fuse
If no LED’s light up on the front or rear after switching on the controller, no buzzer
is audible and no connection can be established with the software FibroManager, it
is possible that the fuse has been triggered.
Before replacement of the fuse, check whether the required supply voltage has
been connected and whether the supply cable has been correctly connected on
both sides.
Before replacement of a blown fuse, external causes for the blown fuse must be
ruled out or remedied, such as overvoltage of the supply voltage.
The fuse is located on the rear side of the controller.
WARNING!
Only insert fuse types with the required specification!
Never bridge or deactivate the fuse!
Fuse replacement of the 12 to 48V DC power supply
Fig. 14
Fuse replacement of the 12 to 48V DC power supply
Remove the power supply cable.
In order to replace the fuse, unscrew the fuse holder counter-clockwise with a
suitable tool (screwdriver, 4 mm flat head). To remove the fuse, rotate the fuse
drawer with its opening downwards and catch the fuse with your hand.
The installed fuse may only be replaced with an equivalent fuse type (micro-fuse:
4A (T), 5 x 20 mm).
If the newly inserted fuse is again blown after switching on the controller and
external causes have been ruled out, then there is a defect present in the power
supply or in one of the modules that are to be supplied. In this case, the device
must usually be taken out of operation and must be sent to the manufacturer for
repair. Outside of the warranty period and following the conditions specified in the
chapter “Warranty and Liability”, a repair on-site may be possible.
