Chapter 1: Getting Started 7
Article Name Location Description
8 Fan
Back
Disposes of excess heat and cools the expansion
unit.Ifthefanmalfunctions,theALERTLED
indicator will show a blinking red light.
9 Power Port ConnecttheACpowercordhere.
10 Expansion Port
ConnectSynologyDiskStationhere.Forthelist
ofsupportedmodels,pleaseseetheHardware
Specications table at Page 8.
11
DEFAULT/
MANUAL
Switch
Inthedefaultmode,theexpansionunitcanauto
power on/off with the linked DiskStation, while in
themanualmode,theexpansionunitcannotauto
power on with the DiskStation when using as its
independentvolume.Formoreinformation,please
see the Default/Manual Switch Behavior table
below.
LED Indicator Behavior
Indicator Color Status Description
POWER Blue Static Powered on
Off Powered off
STATUS
Green Static Volumenormal
Orange Blinking Volumedegraded
Off Novolumeorvolumecrashed
HDD hibernation
ALERT Red Blinking Systemfanmalfunctioning
Off Systemfannormal
Drive status
(on trays)
Green Static Drive ready and idle
Blinking Accessingdrive
Orange Static Drive error
Off No internal drive
LINK Green Static Connected to Synology DiskStation
Off Not connected to Synology DiskStation
Default/Manual Switch Behavior
Mode Behavior
Default Autopoweron/off
Manual No auto power on