ReadyNAS214 can't start with network connection

[Primecom]

Hi
I use ReadyNAS214. And i have any problems with start my device.
If I perform following actions:
1. Connect the network cord
2. Press the start button
Device is booting, but it's not visible in the network. The network drives are not available
But if I perform following actions:
1. Disconnect network cord
2. Press start button
3. Wait for massage "Booting" on the LED-screen
4. Connect the network cord
Device start normaly. It's visible in the network and network drive are avaliable.
Firmware version: 6.9.2
In the logs don't have any errors with network adapters
How can i solved this problem?

[StephenB]

What apps are installed, and what services are enabled?

[Primecom]

1. Enabled services:
SMB, AFP, ReadyDLNA, UPnP, HTTP, HTTS

2. No installed applications 

[StephenB]

Is your NAS set up to use DHCP in the network settings?

What is the connection path from your NAS to your router? (that is, is it connected through switches, or connected directly to the router).

[Primecom]

NAS set up to use static IP 
I tried connect NAS direct to the router, but its did not lead to changes

[StephenB]

Try changing to DHCP and see if that boots normally.