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Server/Unit Comm Established

NET LED flashing (variable) and UNIT LED flashing (every 5s) - Server and unit communicating

Mitsubishi Electric · MSZ-AP Air Conditioners

What does Server/Unit Comm Established mean?

The Wi-Fi interface is actively communicating with the server (NET LED flashing every 0.5 or 1 second) and communicating with the indoor unit (UNIT LED flashing every 5 seconds). This is part of the normal operation or connection progress.

Common Causes

  • Normal communication establishment and maintenance between the interface, server, and indoor unit.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Confirm your Wi-Fi router is operating correctly and provides internet access.

  2. 2

    Check the Wi-Fi Control App for the current status of your air conditioner.

  3. 3

    If you encounter issues, consider restarting the Wi-Fi interface by holding the RESET button for 2 seconds.

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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