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CAN

CAN — Internal communication fault

SMA · Sunny Boy Inverters

What does CAN mean?

An internal communication issue has been detected within the inverter system. This indicates a problem with the inverter's internal components communicating correctly, which can affect its operation.

Common Causes

  • Internal communication fault.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    If this message appears repeatedly, contact your installer for diagnosis.

  2. 2

    If the issue persists after installer checks, contact the SMA Serviceline.

  3. 3

    Ensure there are no external factors visibly interfering with the inverter's operation or surroundings.

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 29)Search more codes in this manual