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Unit does not receive signals from user interface

Unit does not receive signals from user interface — Remote control lost

Daikin · room air conditioner

What does Unit does not receive signals from user interface mean?

The indoor unit is not responding to commands from the user interface remote control. This could be due to battery issues, signal blockage, or interference.

Common Causes

  • User interface batteries are low or dead
  • Signal transmitter is blocked or too far
  • Interference from fluorescent lights

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check and replace the batteries in the user interface.

  2. 2

    Ensure the user interface is not exposed to direct sunlight.

  3. 3

    Make sure there are no electronic starter type fluorescent lamps in the room that might cause interference.

  4. 4

    Contact your dealer if the problem persists.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

4-way valve abnormality4-way valve abnormality — Refrigerant flow control issueA clapping sound is heardA clapping sound is heard — External device interferingAbnormal function during operation (lightning/radio waves)Abnormal function during operation — Interference suspected
Source: Daikin room air conditioner
Open Manual (Page 19)Search more codes in this manual