CodeRegistry
Brands
  1. Home
  2. Daikin
  3. Air Conditioning
  4. A9
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

A9

A9 - EEV failure

Daikin · Air Conditioning

What does A9 mean?

The Electronic Expansion Valve (EEV) has a defect or is not functioning correctly.

Common Causes

  • Defect of the EEV motor.
  • Indoor PCB defect.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Power off the unit for 60 seconds, then power it back on.

  2. 2

    If the error code reappears, the EEV or the indoor PCB may be faulty.

  3. 3

    This issue requires diagnosis by a Daikin-certified technician.

Browse all codes in this manual (79)
Verified technical data. Last updated: April 2026

Related Faults

A0A0 - External protection activeA1A1 - Indoor PCB failureA2A2 - Malfunction of freezing protection
Source: Daikin Air Conditioning
Open Manual (Page 1)Search more codes in this manual