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Knowledge Center

DS723+ Product Manual

Chapter 1: Before You Start

Thank you for purchasing this Synology product! Before setting up your new Synology NAS, please check the package contents to verify that you have received the items below. Also, make sure to read the safety instructions carefully to avoid harming yourself or damaging your Synology NAS.

Notes:

  • All images below are for illustrative purposes only, and may differ from the actual product.

1.1 Package contents

Contact your reseller if your package is missing any of the below contents:

Main unit x 1
AC power cord x 1
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AC power adapter x 1
RJ-45 LAN cable x 2
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Screws for 2.5" drives x 10
Hard drive tray key x 2
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1.2 Synology DS723+ at a glance

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No.
Name
Description
1

Drive Tray

Install drives (hard disk drives or solid state drives) here.
2

Drive Tray Lock

Lock or unlock drive trays.
3

STATUS Indicator

Displays the status of the system. For more information, see "System modes and LED indicators".
4

Drive Status Indicator

Displays the status of drive. For more information, see "Other LED indicators".
5

USB 3.2 Gen 1 Port

Connect external drives or other USB devices to the Synology NAS here.
6

Power Button and Indicator
  1. Press to power on your Synology NAS.
  2. To power off your Synology NAS, press and hold until you hear a beep sound and the Power LED starts blinking.
7

Fan

Disposes of excess heat and cools the system. If the fan malfunctions, the Synology NAS will emit a beeping sound.
8

LAN Port

Connect network cable here.
9

RESET Button
  1. Mode 1: Press and hold until you hear a beep sound to restore the IP address, DNS server, and password for the admin account to default.
  2. Mode 2: Press and hold until you hear a beep, release the button immediately, then press and hold again within 10 seconds to reinstall DiskStation Manager (DSM).

For detailed information on how to reset your Synology NAS, please refer to this article.
10

eSATA Port

Connect Synology Expansion Unit1 to the Synology NAS here.
11

Power Port

Connect power cord here.
12

Kensington Security Slot

Attach a Kensington security lock here.
13

Network Upgrade Slot

Supports the addition of E10G22-T1-Mini network upgrade module.

Notes:

  1. For more information about Synology Expansion Unit supported by your Synology NAS, please refer to Synology Products Compatibility List.

1.3 System modes and LED indicators

System modes definitions

There are 7 system modes in Synology NAS. The System modes and their definitions are as below:

System mode
Definition
Powering on

Synology NAS is powering on when you press the power button or restarting when you run operations in DSM. During the boot up process, the device also performs hardware initialization, such as hardware reset or BIOS initialization.
Shutting down

Synology NAS is shutting down as a result of pressing the power button or operation in DSM.
DSM not ready

DSM is not ready for use. This could either be:

  • Synology NAS is powered on, but DSM is not properly installed.
  • Synology NAS is currently powering on and initializing services necessary for DSM to fully function.
  • The attached UPS device has insufficient power; DSM stops all services to prevent data loss (enters safe mode).
DSM is ready for use

DSM is fully functioning, and users can sign in.
Hibernation

Synology NAS has been idle for a while and is now in Hibernation mode.
Application

Certain packages/services (e.g., USB Copy and Find me service) while in operation will control the actions of the LED. After the operation is complete, the LED indicator will return to its normal state.
Powered off

Synology NAS is powered off.

Identify System Modes

You can identify the system mode through the POWER and STATUS LED indicators. Please refer to the table below for more details.

System Mode
POWER LED
STATUS LED
Blue
Green
Orange
Powering on
Blinking
Off
Off
Shutting down
Blinking
Static
Off/Static1
DSM not ready
Static
Blinking
Off/Blinking1
DSM is ready for use
Static
Static
Off/Static1
Hibernation
Static
Off
Off/Static1
Application
Static
Switching
Powered off
Off
Off
Off

Notes:

  1. If the STATUS LED remains static orange or continuously blinks orange, this indicates there are system errors such as fan failure, system overheating, or volume degrade. Please sign in to DSM for detailed information.

Transitions between System Modes

To better understand the transition between system modes, please refer to the examples below:

  • Powered on with no DSM installed:
    Powered off > Powering on > DSM not ready

  • Powered on with DSM installed:
    Powered off > Powering on > DSM not ready > DSM is ready for use

  • Entering hibernation then waking up from hibernation:
    DSM is ready for use > In hibernation > DSM is ready for use

  • Shutdown:
    DSM is ready for use > Shutting down > Powered off

  • Power failure with UPS attached:
    DSM is ready for use > DSM not ready (due to power failure, DSM enters safe mode) > Shutting down > Powered off > Powering on (power has recovered, DSM will reboot) > DSM not ready > DSM is ready for use

1.4 Other LED definitions

LED Indicator
Color
Status
Description
Drive status
Green
Static
Drive ready and idle
Blinking
Accessing drive
Orange1
Static
Locating drive
Drive deactivated by user
Port disabled2
Drive health status is Critical or Failing
Removing this drive will cause system damage; this is the only drive with DSM installed
Off
No internal Drive
Rear 1GbE LAN

(on upper side of jack)
Green
Static
Network connected
Blinking
Network active
Off
No network
Rear 1GbE LAN

(on lower side of jack)
Green
Static
1 Gbps connected
Orange
100 Mbps connected
Off
10 Mbps connected/No network

Notes:

  1. When the drive LED indicator is orange, we recommend you sign in to DSM and go to Storage Manager > HDD/SSD for more information.
  2. Please try to restart your Synology NAS or re-insert the drives, then run the HDD/SSD manufacturer's diagnostic tool to check the health status of the drives. If you can sign in to DSM, please run the built-in S.M.A.R.T. test to scan the drives. If the problem remains unresolved, please contact Synology Technical Support for help.

1.5 Hardware Specification

Item
DS723+
CPU
AMD Ryzen R1600
RAM
DDR4 2 GB
Compatible Drive Type
• 3.5"/2.5" SATA x 2

• M.2 2280 NVMe SSD x 2
External Port
• USB 3.2 Gen 1 x 1

• eSATA x 1
LAN Port
1GbE (RJ-45) x 2
Network Upgrade Slot
Gen3 x2 slot (x2 link) x 1
Size (H x W x D) (mm)
166 x 106 x 223
Weight (kg)
1.51
Agency Certification
• FCC Class B • CE Class B • UKCA • BSMI Class B

• EAC • VCCI • CCC • RCM • KC • RoHS Compliant
HDD Hibernation
Yes
Scheduled Power On/Off
Yes
Wake on LAN
Yes
Environment Requirement
• Line voltage: 100V to 240V AC

• Frequency: 50 / 60Hz

• Operating Temperature: 32 to 104˚F (0 to 40˚C)

• Storage Temperature: -5 to 140˚F (-20 to 60˚C)

• Relative Humidity: 5% to 95% RH

Notes:

  • Model specifications are subject to change without notice. Refer to Synology website for the latest information.

1.6 Spare Parts

Refer to Spare Parts if you need to replace system fans, disk trays, or power supply units.

Model Name
Picture
Description

Disk Tray (Type D9)

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3.5"/2.5" Drive Tray With Lock

FAN 92*92*25_1

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System Fan 92*92*25 mm

Adapter 65W_2

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Adapter 65W Level VI

1.7 Optional Accessories

With Synology accessories, you can customize your Synology NAS to fit different business environments without worrying about compatibility and stability. Refer to Synology Products Compatibility List for more information.

1.8 Safety instructions

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  • Keep away from direct sunlight and chemicals. Ensure a stable environment with no abrupt changes in temperature or humidity.

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  • Place the unit right side up at all times.

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  • Keep the unit away from liquids.

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  • Before cleaning, unplug the power cord(s) and use a damp cloth to wipe the surface. Do not use chemical aerosol cleaners.

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  • To prevent the unit from falling over, do not place it on carts or any unstable surfaces.

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  • When setting up this product, use only Synology-provided or designated cables, power cords, PSUs, and power adapters that adhere to local regulations and safety requirements. Ensure the power cord(s) are plugged into the correct power supply voltage and that the AC voltage provided is correct and stable. Failure to do so may result in malfunctions or fires.
  • Do not use Synology-provided accessories on non-Synology products.

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  • Warning, electric shock hazard. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.

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  • There is a risk of explosion if the battery is replaced with an incorrect type. Dispose of used batteries appropriately.

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  • Power cord(s) must be plugged into a socket-outlet with earthing connection.

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  • Keep your body parts away from a moving fan.

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  • This product must be installed by qualified personnel in a restricted access location (e.g., dedicated equipment rooms, service closets, etc.).

Download PDF
1.1
Package contents
1.2
Synology DS723+ at a glance
1.3
System modes and LED indicators
System modes definitions
Identify System Modes
Transitions between System Modes
1.4
Other LED definitions
1.5
Hardware Specification
1.6
Spare Parts
1.7
Optional Accessories
1.8
Safety instructions