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E3

E3 - Actuation of low pressure switch (LPS) (Outdoor Unit)

Daikin · Simple Self Diagnosis by Malfunction Code | Daikin

What does E3 mean?

The low-pressure switch in the outdoor unit has been activated, indicating abnormally low refrigerant pressure.

Common Causes

  • Low refrigerant charge
  • Blockage in the refrigerant lines
  • Faulty low-pressure switch

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the unit.

  2. 2

    Ensure all external air vents are clear of obstructions.

  3. 3

    Turn the unit back on.

  4. 4

    If the error code reappears, contact a professional for a refrigerant check.

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

Related Faults

6-06-0 - External protection device activated (Heat reclaim ventilator)6-16-1 - Malfunction of PCB (Heat reclaim ventilator)6-26-2 - Ozone density abnormal (Heat reclaim ventilator)
Source: Simple Self Diagnosis by Malfunction Code | Daikin
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