Alarm 504 — The inverter has a message

What does Alarm 504 mean?

The EME accessory reports that the connected PV-inverter has an internal message or status that needs attention. This is a status from the inverter, which could be an error, a warning, or an informational message.

• The PV-inverter connected to the EME accessory has an internal status message.
• Communication issue between the EME and the PV-inverter.
• Fault or warning condition within the PV-inverter itself.

Click steps to track your progress.

1. 1

   Check the connected PV-inverter's display or its dedicated app for any specific messages or errors.

2. 2

   Consult the PV-inverter's user manual for troubleshooting its internal messages.

3. 3

   Power cycle both the EME20 accessory and the PV-inverter.

4. 4

   Update the NIBE SMO 20 firmware to version v9542R2 or later so this appears as an information message, not a critical alarm.