HP Surestore Disk Array FC60 HP SureStore E Disk Array 12H User's and Service - Page 119

Troubleshooting Troubleshooting Troubleshooting Procedures Troubleshooting Procedures This section provides troubleshooting procedures that can be used to identify components within the disk array that have failed. Fan Module The disk array enclosure is designed to ensure proper airflow with two fan modules operational, regardless of the number of disk modules installed. No filler panels are required for empty disk module slots. All three fans must be installed for proper airflow. If a fan module fails, an amber fan status light indicates that the fan speed is too slow or that the fan has stopped blowing air. A failed fan module has no airflow. If two fans fail, power will automatically shut down to avoid overheating. Power Module Each power module contains a power supply with an internal fan for cooling. Three power modules (redundant configuration) use active current sharing to distribute the power load. If one power module fails or is removed, or if one of the ac power cords is accidentally removed, the other two power modules take over the entire power load for the enclosure without interruption. CAUTION! The following conditions will cause a power module to shut down automatically: • two failed fan modules; • a power module internal fan failure or other internal failure; • an over-current condition caused by a faulty disk module or by using an unsupported disk type with an excessive current rating. 119