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A6

A6 — No response frame error (M-NET Remote controller only)

Mitsubishi Electric · MXZ Air Conditioners

What does A6 mean?

This error, specific to the M-NET remote controller, indicates that a device on the network failed to send a response frame within the expected timeframe. This suggests a communication timeout or unresponsive device.

Common Causes

  • A device on the M-NET network is not powered on or functioning.
  • Communication line issue preventing response transmission.
  • Incorrect addressing preventing proper routing of response.
  • A device is unresponsive due to an internal fault.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure all devices connected to the M-NET network are powered on and appear to be functioning correctly.

  2. 2

    Verify that all device addresses are correctly configured and unique within the M-NET system.

  3. 3

    Check the M-NET communication wiring for any breaks, poor connections, or incorrect terminations.

  4. 4

    Power cycle the entire M-NET system to reset communication.

  5. 5

    If the problem continues, a technician should examine the M-NET network for unresponsive devices or communication issues.

Browse all codes in this manual (40)
Verified technical data. Last updated: April 2026

Related Faults

7seg LED (not lit)7-segment LED not lit — Multi controller board power issue8181 — Compressor temperature trouble8282 — Superheat due to low discharge temperature trouble
Source: Mitsubishi Electric MXZ Air Conditioners
Open Manual (Page 57)Search more codes in this manual