2.
MAINTENANCE
Periodic checks and maintenance are important for proper operation of any electronic systems.
This chapter contains maintenance instructions to be followed to obtain optimum performance
and the longest possible life of the equipment. Any maintenance must be executed by a suitably
qualified technician.
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
Only qualified personnel
should work inside the
equipment.
•
Do not disassemble or modify the
equipment.
Fire, electrical shockor serious injury can
result.
2.1 Annual Recertification
The VDR must undergo an annual performance test to recertify suitability. This test is conducted
by a test engineer authorized by the manufacturer and certified by a relevant ship classification
society, the content and procedure of the test in accordance with the regulations of that society.
For further details about the VDR performance test, contact your ship classification society.
2.2 Cleaning
Dirt or dust may be removed from units with a soft cloth. 0 0
• Fresh water-moistened cloth may be used to remove
stubborn dirt. DO NOT use any commercial cleaning
agents to clean any unit. They can remove paint and
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markings. This is especially important with the
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Waterproof Microphone VR-3012W. The watertight
integrity of the microphone will be compromised if any ~ @",
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commercial cleaning agent contacts the ventilation @?J @?J
sheet behind the MIC cover.
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Waterproof microphone VR-3012W (bulkhead type)
9
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2.5 Replacing Acoustic Beacon
The life of the underwater acoustic beacon is approximately 6 years, It must be replaced (Type:
DK-120, Code no, 000-148-648) by a qualified service technician before validity date marked on
the beacon,
1, Unfasten two bolts and remove the beacon cover,
2, Use box screwdriver (7 mm) or slotted screwdriver to unfasten four bolts and then remove
the beacon,
3, Attach a new beacon,
Bolts
Water switch is right side,
(The label is upside-down.)
Validity date should face in front •
Acoustic beacon
DRU (Beacon cover removed)
NOTICE: As the acoustic beacon contains a battery, it must be disposed of in accordance with
appropriate regulations,
12
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, . Fuses
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 Remarks
interval
Battery in DCU 4 years 2 pes" 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 Data cannot be recorded to the backup HDD
when it fails, Error 018 is generated when
this occurs,
DC-DC converter 6 years Failure prevents powering of the VDR by DC
power.
DCU chassis fan 6 years Failure of one or both of these fans prevents
DCU CPU fan 6 years the CPU from operating, which may prevent
start up of the VDR
CMOS battery on CPU board 6 years Failure of this battery prevents GPS time
in DCU synchronization, Error 026 is generated
when this occurs,
AC power supply 6 years Failure prevents powering of the VDR by AC
power.
14
