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Blue LED flashes slowly (approx. one minute)

Blue LED flashes slowly (approx. one minute) — Communication connection being established

SMA · Sunny Boy Inverters

What does Blue LED flashes slowly (approx. one minute) mean?

The inverter is in the process of establishing a network connection to a local network or a direct connection to a device like a computer, tablet, or smartphone via Ethernet.

Common Causes

  • Inverter is attempting to connect to a network (local or direct)
  • Network components (router, switch) may be starting up or re-establishing connection

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Wait for the connection to be established; this process typically takes around one minute.

  2. 2

    Ensure all network cables are securely connected if using Ethernet.

  3. 3

    Check that your local network (router, Wi-Fi) is operating correctly.

  4. 4

    If the issue persists, try restarting your network devices and then the inverter.

Browse all codes in this manual (70)
Verified technical data. Last updated: April 2026

Related Faults

!PV-Overvoltage!!PV-Overvoltage! !DISCONNECT DC! — Overvoltage at DC input10251Event 10251 — Communication status to network switch or DHCP server changed10252Event 10252 — Communication disrupted
Source: SMA Sunny Boy Inverters
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