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CO-02

CO-02 — Flow sensor malfunction

Daikin · ASHP Error Codes

What does CO-02 mean?

Another instance indicating a problem with the flow sensor's functionality.

Common Causes

  • Debris affecting the sensor
  • Electrical fault in the sensor
  • Software glitch

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the flow sensor for any obstructions.

  2. 2

    Verify all associated wiring is secure.

  3. 3

    Perform a system reset.

  4. 4

    Call for service if the malfunction persists.

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

Related Faults

7H-017H-01 — Water flow problem7H-047H-04 — Water flow problem during domestic hot water production7H-057H-05 — Water flow problem during heating/sampling
Source: Daikin ASHP Error Codes
Open Manual (Page 2)Search more codes in this manual