Chapter 4
MAINTENANCE
4.5
FAULT FINDING
4-19
4
INSTRUCTION MANUAL
4.5 FAULT FINDING
In case of semiconductor circuits, it is deemed that there are few cases in which the used
semiconductor devices have inferior quality or performance deterioration except due to
insufficient design or inspection or by other external and artificial causes. In general, the
relatively many causes are disconnection in a high-value resistor due to moisture, a
defective variable resistor and poor contact of a switch or relay.
Some troubles are caused by defective parts, imperfect adjustment (such as tuning
adjustment) or insufficient service (such as poor cable contact). It will also be effective
to check and readjust these points.
4.5.1 LIST OF ALARMS AND OTHER INDICATIONS
If any of the following alarm occurs, the system displays the alarm message in red in
order to attract the attention of operator. Other messages are displayed with the suitable
color which is yellow or blue depending on the level of message importance.
Alarm: Red ࣭Collision-related Alarm
࣭Navigation Alarm
࣭System Alarm
Caution:
Yellow ࣭System Warning
Status:
Blue ࣭Operation Information
The following table shows alarms and other indications the system displays.
Table 4.5-1 Alarm list
Alarm name
(Japanese)
Alarm name
(English)
Class Description
㆙ሗ࢚࣮ࣛ Alarm Error Alarm Cannot send the alarm because of insufficient message buffer for
alarm task.
Table 4.5-2 Alarm list of system alarm: scanner
Alarm name
(Japanese)
Alarm name
(English)
Class Description
✵୰⥺ Ᏻ SW ࢜ࣇ Scanner(SSW Off) Alarm The safety switch OFF bit of scanner communication data is set.
✵୰⥺ AZI Scanner(AZI) Alarm The BP error bit of scanner communication data is set.
✵୰⥺ HL Scanner(HL) Alarm The BZ error bit of scanner communication data is set.
✵୰⥺ ኚㄪ㧗ᅽ Scanner(MHV) Alarm The high-voltage modulator error bit of scanner communication
data is set.
✵୰⥺ ↓㏻ಙ Scanner(Time Out) Alarm No reply from the scanner after data transmission.
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