Synology DX513 User Manual page 10

LED Behavior
Solid Green
STATUS
Off
Solid Orange
ALERT
Off
Solid Green
Hard Disk
Flashing Green
Status
Solid Orange
(on tray)
Off
Description
System is functioning
System is not working
Fan is not working
Fan is functioning
Disk is ready and idle
Disk is being accessed
Read/write or other errors are encountered
No internal disk is found
Chapter 1: Get Started with DX513 5