4.2 Power Failures

12 VDC Low Current

If the +12 VDC control power is disconnected during operation, the display will be blank, the flywheel speed will decrease, and the brake will be locked (no precession).

• Verify the boat’s circuit breaker supplying +12 VDC control power has not tripped, and the AC breaker is On.
• When +12 VDC control power is restored, the MFD app will power up, the Splash Screen will appear, and then the Home Screen will appear.
• Press the Power On/Off button . The progress bar will appear and indicate flywheel speed. When the flywheel is at its minimum operating speed, the Stabilize button will appear, allowing stabilization to be turned on. This may take up to 20 minutes, depending on the flywheel’s speed when the +12 VDC is turned back on.

Seawater Pump Power

If the Seawater Pump input DC power is disconnected during operation, the Seawater Pump will fail to provide cooling seawater flow when required. The resulting high temperatures would result in the Seakeeper being turned off (no stabilization) due to high temperature alarm(s).

• Verify that the boat’s circuit breaker or fuse supplying power to the DC Seawater Pump has not tripped or blown.
• When DC SW Pump power is restored, reset any alarm and continue Seakeeper operation.

AC Power Failure

If the AC power is disconnected during operation, a notification screen will indicate “AC Mains Low”. If the failure is not corrected within 2 minutes, an “AC Mains Low” alarm will be triggered. The brake will lock, and the Seakeeper will stop moving if stabilization is on.

• Verify the boat’s circuit breaker supplying 110-230 VAC to the Motor Drive Box has not tripped.
• When 110-230 VAC is restored, the display will power up, the Splash Screen will appear, and then the Home Screen will appear.
• Press the Power On/Off button . The progress bar will appear and indicate flywheel speed. When the flywheel is at its minimum operating speed, the Stabilize button will appear, allowing stabilization to be turned on. This may take up to 30 minutes, depending on the flywheel’s speed when the 110-230 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 (110 – 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.