Daikin Air Conditioner Error E3-00

⚡ Quick Answer: The Daikin Air Conditioner E3-00 error indicates a communication failure between the indoor and outdoor units, often triggered by high refrigerant pre... ✅ DIY Fixable

What Does Error E3-00 Mean?

The Daikin Air Conditioner E3-00 error indicates a communication failure between the indoor and outdoor units, often triggered by high refrigerant pressure. This results in the unit stopping operation mid-cycle, with possible brief display indications before it shuts down. The unit may not restart until the pressure abnormality is resolved, which could be due to flow issues, a blockage, or airflow obstructions.

Common Symptoms:

  • Air conditioner stops operation mid‑cycle during cooling or heating when the high‑pressure trigger occurs. [Errors Codes Ultimate](
  • Possible brief display before automatic shutdown.
  • Unit may refuse to restart until pressure abnormality is resolved. [Errors Codes Ultimate](

Possible Causes

  • High refrigerant pressure detected (pressure switch activated) (medium)
  • Refrigerant system flow issues (blockage/overcharge/dirty coils) (medium)
  • Outdoor unit fan or airflow obstruction (medium)

How to Fix Error E3-00

DIY Fix Check outdoor unit and airflow

  1. Turn off and unplug the air conditioner.
  2. Inspect outdoor unit for debris and dirt on coils.
  3. Clear obstructions around the outdoor unit to improve airflow.
  4. Ensure the outdoor fan runs when the unit is powered on.

DIY Fix Reset the unit

  1. Turn the unit fully off using the remote control.
  2. Switch off power at the breaker or unplug.
  3. Wait 5–10 minutes and restore power.
  4. Turn the unit back on to see if the error reoccurs.

Technician Only Diagnose and correct high pressure conditions

  1. Measure refrigerant pressures and compare with factory specifications.
  2. Inspect and clean outdoor heat exchanger coil thoroughly.
  3. Check outdoor fan motor and replace if inoperative.
  4. Adjust refrigerant charge to correct levels (recover/evacuate/recharge).

Parts needed: Refrigerant pressure sensors or high‑pressure switch, Outdoor fan motor, Refrigerant (if recharge necessary), Outdoor heat exchanger coil cleaning materials

🛑 When to Call a Pro:
  • If the E3 code persists after basic reset and outdoor clearing.
  • If there are signs of refrigerant leakage (hissing, oily residue).
  • If indoor comfort is significantly impaired and the unit will not restart.

Technical Specifications

wattage N/A
component Communication Cable
resistance N/A
part_number DAIKIN 4B180A
voltage_rating 230V AC

Common Questions

What does E3-00 error mean on Daikin Air Conditioner?

E3-00 indicates a communication failure due to high refrigerant pressure, causing the unit to stop mid-cycle.

Can I fix Daikin Air Conditioner E3-00 error myself?

Yes, you can check the outdoor unit for obstructions and reset the unit to see if the error clears.

How much does it cost to fix E3-00 error?

Repair costs range from ¥15,000 to ¥60,000, depending on parts and labor.

When should I call a technician for E3-00?

Call a technician if the error persists after a reset, if there's refrigerant leakage, or if the unit won't restart.

Sources & References

Data last verified: 2026-07-07

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