Asus RS920-E7/RS8 - CATT Error LED (CATTERR_LED1); CPU Warning LED (ERR_CPU1;2;3;4)

ASUS RS920-E7/RS8; RS926-E7/RS8 4-19
3. CPU warning LED (ERR_CPU1/2/3/4)
The CPU warning LEDs light up to indicate an impending failure of the
corresponding CPU.
4. CATTERR LED (CATTERR_LED1)
The CATTERR LED indicates that the system has experienced a fatal or
catastrophic error and cannot continue to operate.