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ERR LED (Orange) solid

ERR LED (Orange) solid — Wi-Fi Network Error

Mitsubishi Electric · MSZ-AP Air Conditioners

What does ERR LED (Orange) solid mean?

The orange ERR LED on the Wi-Fi interface indicates a problem with the network connection or communication. The system may not be able to connect to the MELCloud service.

Common Causes

  • Wi-Fi signal issues or poor signal strength
  • Incorrect Wi-Fi settings or password
  • Router incompatibility (e.g., encryption not WPA2-AES)
  • Wi-Fi interface module malfunction

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check your router to ensure it is powered on and functioning correctly.

  2. 2

    Verify that your router supports WPA2-AES encryption for the Wi-Fi connection.

  3. 3

    Hold down the RESET switch on the Wi-Fi interface for 2 seconds to reboot it.

  4. 4

    If the error persists, hold down the RESET switch for 14 seconds to initialize the Wi-Fi interface to factory default settings, then re-setup the connection.

  5. 5

    Ensure you have accepted the terms and conditions of the MELCloud Wi-Fi service.

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Verified technical data. Last updated: April 2026

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Source: Mitsubishi Electric MSZ-AP Air Conditioners
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