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AJ

AJ - Capacity setting error

Daikin · Air Conditioning

What does AJ mean?

The system's capacity settings are incorrect or missing.

Common Causes

  • Capacity setting adaptor is missing.
  • Incorrect capacity settings.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify that the capacity setting adaptor is correctly installed.

  2. 2

    Ensure the unit's capacity is correctly configured for the installation.

  3. 3

    Consult the installation manual or a technician for proper capacity setting procedures.

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
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