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EC

EC - Inlet water temperature abnormal

Daikin · Air Conditioning

What does EC mean?

The temperature of the water entering the unit is abnormal.

Common Causes

  • Abnormal water temperature detected.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the temperature of the water source.

  2. 2

    Ensure the water flow rate is within the unit's specifications.

  3. 3

    If the water temperature is outside the operating range, address the source.

  4. 4

    Consult a technician if the unit registers abnormal temperature despite normal source conditions.

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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