4.3 230 VAC Failure

AC Power 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 and the Seakeeper will stop moving if stabilization was on.

• Verify the boat’s circuit breaker supplying 208-230 VAC to the Motor Drive Box has not tripped.
• When 208-230 VAC is restored, the display will power up, the Splash Screen will appear, and then the Home Screen will appear.
• Press Power On/Off button to clear the alarm. The progress bar will appear and indicate flywheel speed. When the flywheel is at minimum operating speed, the Stabilize button will appear so stabilization can be turned on. This may take up to 30 minutes, depending on the speed of the flywheel when the 208-230 VAC is turned back on.

AC Power 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.