This issue is fixed in System Software 1.1.1.
During high system stress, or during hardware diagnostic tests, low fan speed errors or fan faults might appear in the event log. These errors or faults might occur due to an incorrect setting of the fan rotation threshold in firmware. In rare cases this can shut down the system to prevent a perceived over-temperature condition.
If you encounter fan errors/faults, upgrade to the latest system software. If fan errors/faults continue after upgrading, contact Oracle Service.