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LED twice every 5 sec

ERR/NET LED flashes twice every 5 sec — Not connected to server

Mitsubishi Electric · MSZ-AP Air Conditioners

What does LED twice every 5 sec mean?

The ERR or NET LED flashes two times, then pauses for 5 seconds, repeating the pattern. This indicates that the Wi-Fi interface is not connected to the Mitsubishi Electric server.

Common Causes

  • Router is not connected to the internet
  • Mitsubishi Electric server is experiencing issues or is offline
  • Temporary internet service provider (ISP) outage

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check if your Router is connected to the internet and ensure other devices can access online content.

  2. 2

    Verify that your internet service is operational and stable.

  3. 3

    Push the RESET Button on the Wi-Fi interface for 2 seconds to initiate a reconnection attempt with the server.

  4. 4

    If problems persist, check Mitsubishi Electric's website for any server status updates.

Browse all codes in this manual (87)
Verified technical data. Last updated: April 2026

Related Faults

3 Min Restart DelayUnit cannot be operated for about 3 minutes after restart - Microprocessor protection3 Short Beeps3 short beeps from indoor unit - Weekly timer setting failedAP Mode activatedNET and MODE LEDs flashing (every 5 seconds) - Access Point Mode activated
Source: Mitsubishi Electric MSZ-AP Air Conditioners
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