Technical Manual

36 D C U M a i n t e n a n c e a n d O p e r a t i o n M a n u a l
Repairs
Repairs
Repairing the DCU
Be sure to note all repairs and changes to the DCU in the maintenance log.
For safety reasons, any repairs described in this section should begin with the unit
completely powered down (including disconnection from the battery) prior to
commencing the repair.
When the DCU is powered down, its backhaul will also go off-line. The
AclaraONE headend will be able to detect that the DCU has gone off-line and will
show an off-line status on the user screen.
After the repairs are complete, the battery may be reconnected, and power must be
restored to the DCU. When the backhaul is restored. The AclaraONE headend will
display a status of online for the DCU.
Replacing a Fuse
An AC powered unit is expected to have a disconnect switch, which interrupts
power. The battery harness also contains a fuse which might blow.
Replace any blown fuse with a suitable, comparable fuse of the required rating.
Refer to the fuse labeling or the wiring diagram for replacement fuse information.
Replacing the Battery
Refer to the Battery section of the DCU Installation Instructions, Y20977-TUM.