Section 3: POWER FAILURES, ALARMS, AND TROUBLESHOOTING
3.2 230 VAC Failure
If the AC power is not connected, a notification screen will indicate “AC Mains Low”. If the
failure is not corrected within two minutes, an “AC Mains Low” alarm will occur. The brake will
lock.
Verify the boat’s circuit breaker supplying 208-230 VAC to the Motor Drive Box has not
tripped.
Once 208-230 VAC is restored:
Press POWER ON/OFF to clear the alarm. Then press the POWER ON/OFF
button again to continue Seakeeper operation.
The progress bar will appear and indicate flywheel speed. When the flywheel is at
minimum operating speed the progress bar will turn green and gyro brake system may
be unlocked. This may take up to 15 minutes, depending on the speed of the flywheel
when VAC is turned back on.
3.3 230 VAC Fluctuation, Spike or Momentary Failure
If the AC voltage to the Motor Drive Box is outside Seakeeper’s specified range (208 – 230
VAC), the Motor Drive Box will briefly shut down for protection. The Motor Drive Box will
continue operation when the voltage returns to the specified range.
A brief fluctuation can happen when the generator is unable to regulate its output voltage,
particularly when a large AC load is switched on or off. A momentary AC failure also happens
during transition from shore power to ship’s power.
3.4 Alarms
The Seakeeper issues an alarm when it detects a malfunction that could cause damage or
erratic operation. When an alarm occurs, the Seakeeper will stop and an alarm message is
shown on the Display.
The alarm will not clear until the operator presses the POWER ON/OFF button and the alarm
condition is no longer present. The operator can then press the POWER ON/OFF button again
to continue Seakeeper operation.
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