When the node B embedded module fault LED on a Dell EMC PowerStore system is blinking blue and amber alternating at one-second intervals, it indicates that the node is in service mode1. Service mode is a state where the node is not in normal operation and may be undergoing maintenance or diagnostics.
In service mode, the node is typically isolated from normal storage operations to allow for troubleshooting, hardware replacement, or software updates without affecting the rest of the system. The alternating blue and amber LED is a visual indicator used by technicians to identify the current state of the node.
To return the node to normal operation, the service task must be completed, and the node must be taken out of service mode using the appropriate commands through the system's management interface. For detailed procedures on managing nodes in service mode, refer to the Dell EMC PowerStore Service Manual or contact Dell EMC Support for guidance2.