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Red LED glowing

Red LED glowing — Event occurred

SMA · Sunny Boy Inverters

What does Red LED glowing mean?

A red LED glowing steadily indicates that an event or error has occurred with the inverter. A specific event message and number will be available on the inverter user interface or communication product.

Common Causes

  • Inverter error or fault condition
  • Various system events, such as ground fault, communication issue, or overheating

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the inverter user interface or communication product for the specific event message and number.

  2. 2

    Refer to the troubleshooting section of the manual for the displayed event number.

  3. 3

    If a specific fix is not obvious, contact service with the exact event number.

  4. 4

    Ensure all wiring connections are secure and undamaged.

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
Open Manual (Page 16)Search more codes in this manual