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2.7 Replacing Fuses
The battery cable in the DCU contains two 10A fuses in fuse holders. If a fuse blows, the
BACKUP BATTERY LED may not be lighting. Find the cause before replacing a fuse. Have a
serviceman replace any fuse.
2.8 Replacing Parts
Interval-specific parts
The batteries in DCU and the acoustic beacon on the DRU must be replaced every 4 and 6 years
respectively to comply with IMO conventions. Record the date of expiration on the card in the
card holder on the door of the DCU.
Part Replacement
interval
Remarks
Battery in DCU 4 years 2 pcs., replace together
Acoustic underwater beacon in DRU 6 years
Consumable parts
The parts in the table below should be replaced before the estimated lifetime shown. The period
of expiration begins from the date of installation. Record the date of replacement on the card in
the card holder on the door of the DCU.
Consumable part Life Remarks
Backup HDD 2 years / 25℃
Data cannot be recorded to the backup HDD
when it fails. Error 018 is generated when
this occurs.
DC-DC converter 4 years / 25℃* If DC power supply fails, RAP indicates 082
and AP in DCU indicates 84.
DCU chassis fan 6 years / 25℃*
DCU CPU fan 6 years / 25℃*
Failure of one or both of these fans prevents
the CPU from operating, which may prevent
start up of the VDR.
CMOS battery on CPU board
in DCU
6 years / 25℃ Failure of this battery prevents GPS time
synchronization. Error 026 is generated
when this occurs.
AC power supply 6 years / 25℃ If AC power supply fails, RAP indicates 214
with AC power switch ON.
* = Product has a 90% probability of achieving full lifespan
Fuses