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14.
MAINTENANCE
Since the sensor unit is the maintenance-free type. After installing and starting operation of the
sensor unit, it is not necessary to provide maintenance services for 3 years basically.
MD-SX sensor does not need the renewal parts.
Regarding the contamination of the lens surface, it is necessary to be cleaned the sensor hood
section when the error code 17 which means the sensitivity decreased occurred and daily
operation check.
Please refer to [
16.3 Sensor cleaning procedure
].
During engine operation, if the sensor unit is removed for maintenance or inspection, the alarm will
be activated, and the engine protective relay may trip.
And please switch off the power of controller whenever the sensor is removed
To prevent activation of the alarm, disconnect the external output line from the controller, or
take the other measures.
When disconnect the external wires from the terminal block, record the wire numbers so that
they will be reconnected correctly. If necessary, mark the wires with the terminal block
numbers.
If any problem is found as the result of inspection, see Section [15. Troubleshooting,] and take
necessary measures.
(1) Checking for abnormalities (Check as needed.)
1) Check that excessive vibrations are not applied to the sensor units and they are fitted securely.
If the sensor unit is vibrated or loose, tighten the sensor unit.
2) Check for oil leak from the sensor unit mounting screws. If the oil leaks, reinstall the sensor unit while
referring to Section [8 INSTALLATION].
3) Check that the controller main body does not show abnormal heat generation, vibrations or noises.
If a problem is detected, check the wiring conditions of the terminals and the input power supply
voltage.
(2) Confirmation of indication of mist indicator LEDs (Check as needed.)
1) Periodically check the engine load factor at the start of the engine and during normal operation and the
correlation between the load factor and the mist indicator LEDs.
2) Check that the mist indicator indicates “2” to “3” while the engine is operating at the rated conditions.
If the indication is improper, particularly if the indication of the mist indicator is remarkably high (in
the yellow range), the engine may be disordered. In this case, check the engine.
If the engine is not defective, operate the engine with the full load, and check the engine again with the
full load. In addition, set the full load again.
(3) Loosing of screws of various parts (Check every six months.)
1) Check for loosing of the rubber vibration insulators (if the rubber is fitted), and bolts for mounting the
controller. If the rubber or the bolts are loose, tighten them.
2) Check for loosing of wire connections on the terminal block in the controller.
Check for loosing of the board mounting screws and wire connectors.
If screws or connectors are loose, tighten them.
!
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Issued to HORIZON TANKERS LIMITED S.A.
