Seagate Pro 2-Bay Manual page 35

Review the LED behavior below if your Seagate NAS Pro is connected to a UPS.
Status LED
Blinking red and off
Solid red
Seagate NAS Pro 2-Bay | 4-Bay | 6-Bay
Hard drive LED
Solid or blinking white
Solid or blinking white
State
UPS battery error.
UPS critical error or it is not available.
4/28/15 35