One of the fans in UPS No 1 failed causing the UPS to overheat and shut down.
The fan has been replaced and the temperature alarm tested.
Considerations from the above event:
- The failure of UPS No 1 and subsequent failure of the other equipment should have resulted in a DP yellow alert.
- With redundancy compromised the vessel needed to consider a move further away from the installation and out of the 500m zone.
- Fans, filters and alarms should be adequately covered at component and sub system level by the vessel planned maintenance system.