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BT Versatility
Installation and maintenance Manual
42
Power supply unit spare fuse
A spare mains fuse is located in the Power supply unit. It is in a holder directly below the installed fuse
(3.15A T).
If there is no power being supplied to the unit check if the fuse is blown
1. Power the system down by unplugging it at the mains.
2. If a battery is installed turn off the BBU switch to disconnect the battery.
3. Remove any voice or network modules.
4. Open the CCU main cover by opening the four ‘quarter turn’ screws indicated in the first diagram
below.
5. Check the fuse on the Power supply
6. If it is blown replace it with the spare fuse
Note: The spare fuse should only be used to replace the installed mains fuse type 3.15A T and should
not be used to replace any other fuse on the power supply board.