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abnormal sound

Abnormal sound heard during operation — Potential malfunction

Daikin · Air Conditioner

What does abnormal sound mean?

You hear a sound that is not normal during operation. This could indicate various issues with the unit's components.

Common Causes

  • Internal component issue
  • Loose part
  • Fan obstruction

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Stop operation immediately and turn off the circuit breaker.

  2. 2

    Try to identify the source and type of abnormal sound.

  3. 3

    Call your dealer immediately for inspection and repair.

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

Related Faults

0000 — Normal operationA1A1 — Indoor unit PCB defect detectedA5A5 — High pressure or freeze-up protector activated
Source: Daikin Air Conditioner
Open Manual (Page 30)Search more codes in this manual