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System does not control correctly / strange behaviour

System does not control correctly or has strange behaviour — Conflicts with other controllers

Mitsubishi Electric · Wi-Fi Interfaces

What does System does not control correctly / strange behaviour mean?

If your system isn't responding as expected or exhibits unusual behavior, it could be due to conflicts between the Wi-Fi Heat Pump Control service and other local controllers or control systems.

Common Causes

  • Local controllers overriding Wi-Fi commands.
  • Conflicting timer settings between the app and local controllers.
  • Multiple users making conflicting adjustments.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check if any local controllers or other users are actively overriding the Wi-Fi Heat Pump Control settings.

  2. 2

    If using the Timer function in the Wi-Fi app, delete any conflicting timer settings from your local Heat Pump controllers.

  3. 3

    Conversely, if using local timers, ensure no conflicting timers are set in the Wi-Fi app.

  4. 4

    Reset the Wi-Fi interface and re-establish connection to clear potential software conflicts.

Browse all codes in this manual (19)
Verified technical data. Last updated: April 2026

Related Faults

App says 'unit was not found'App says 'unit was not found' — Wi-Fi Interface not communicating with home networkLED 1 flashingLED 1 flashing — WPS pairing in progress (MAC-558/559 models)MAC-558/559 LED 1 0.2 sec interval, LED 2 ON, LED 3 OFFMAC-558/559 LED 1 flashes 0.2 sec, LED 2 solid ON — WPS Activated (PIN)
Source: Mitsubishi Electric Wi-Fi Interfaces
Open Manual (Page 36)Search more codes in this manual