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E3

E3 - High pressure

Daikin · Air Conditioning

What does E3 mean?

The high-pressure switch in the outdoor unit has been tripped.

Common Causes

  • High pressure switch tripped.
  • Blocked airflow.
  • Refrigerant issues.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure the outdoor unit's vents are not blocked by debris or obstructions.

  2. 2

    Check that the condenser fins are clean and not clogged.

  3. 3

    A technician should check the refrigerant levels and system pressures.

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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