What causes Daikin error 6-2?

Faulty ozone sensor. High ozone concentration in the environment. Sensor wiring issue

How do you fix Daikin fault code 6-2?

1. Turn off the unit's power. 2. Ensure the area around the ozone sensor is clean. 3. Restore power and check if the error clears. 4. If the error persists, contact a service technician.

6-2

6-2 - Ozone density abnormal (Heat reclaim ventilator)

Daikin · Simple Self Diagnosis by Malfunction Code | Daikin

What does 6-2 mean?

The ozone sensor in the heat reclaim ventilator has detected abnormal levels.

Common Causes

Faulty ozone sensor
High ozone concentration in the environment
Sensor wiring issue

Repair Steps & Checklist

Click steps to track your progress.

1
Turn off the unit's power.
2
Ensure the area around the ozone sensor is clean.
3
Restore power and check if the error clears.
4
If the error persists, contact a service technician.

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Verified technical data. Last updated: April 2026

Source: Simple Self Diagnosis by Malfunction Code | Daikin

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6-2 - Ozone density abnormal (Heat reclaim ventilator)

What does 6-2 mean?

6-2 - Ozone density abnormal (Heat reclaim ventilator)

What does 6-2 mean?

Common Causes

Repair Steps & Checklist

Related Faults