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AH09

Error AH09 — Filter auto-cleaning not completed

Daikin · Service Manual Daikin Comfort

What does AH09 mean?

This error code appears on the remote controller when the filter auto-cleaning function does not complete within its set time. The unit can still operate normally.

Common Causes

  • Filter auto-cleaning function did not finish within the scheduled time.
  • Incorrect settings for the filter auto-cleaning schedule.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the scheduled time for filter auto-cleaning in the settings.

  2. 2

    Ensure the scheduled time is sufficient for the cleaning cycle.

  3. 3

    Manually initiate filter auto-cleaning if needed.

  4. 4

    Verify no interruptions occurred during the auto-cleaning period.

  5. 5

    Consult the manual for specific auto-cleaning duration requirements.

Browse all codes in this manual (3)
Verified technical data. Last updated: April 2026

Related Faults

Green Operation lamp blinksBlinking green operation lamp — Abnormal shutdown, system stoppedGreen Operation lamp solidSolid green operation lamp — Warning, system continues operation
Source: Service Manual Daikin Comfort
Open Manual (Page 39)Search more codes in this manual