29. Steering With Yokogawa PT-500A
29-11
29.6 Description of Alarms with Yokogawa PT-500A
29.6.1 Alarms
• The ECDIS control unit ALARM ACK lamp goes on.
• Type of alarm is displayed on the display ECDIS display as number and text.
• Alarm is acknowledged by pushing the ECDIS control unit's ALARM ACK button.
• List of typical alarms:
2451 Route: WP approach alarm
2452 Route: Turning disabled
2455 Route: Off course
2456 Route: WP approach error
2458 Route: Last WP approach
2460 Pilot: ROT will be exceed
2461 Route: ROT will be exceed
2468 Disabled - out of course
2469 Autopilot: Off course
2470 Disabled: Needs filter ON
2471 AP mode Conflict - Use AUTO
2475 Route: Needs filter ON
2476 Route: Needs log sensor
2485 Route: WP prewarning
2497 Route: Stop - Sensor Fail
2506 Route: Use AUTO control
2511 Route: Auto resume disable
2512 Use NFU rudder control
2514 Route: NAVI complete turn
2515 Conflict - NAVI complete turn
2516 Autopilot: Drift limit
29.6.2 Errors
Errors should not happen during normal operation. They are related to internal problems.
Integrated operation related alarms
The ECDIS control unit's ALARM ACK lamp goes on, type of alarm is displayed on the ECDIS display as number,
and text alarm is acknowledged by pushing the ECDIS control unit's ALARM ACK button.
List of typical alarms:
2480 Auto pilot receive error
2488 Integrated steering lost
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