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Air Sensor Closed (AUY, ABY & AWY)

Red 2 Pulses, Green Blinks, Yellow Blinks (AUY, ABY & AWY) — Air Sensor Closed Circuit (Short)

Fujitsu · Air Conditioners

What does Air Sensor Closed (AUY, ABY & AWY) mean?

The red LED shows 2 pulses, the green LED blinks, and the yellow LED blinks. This indicates a closed circuit (short circuit) condition in the air temperature sensor, which means the sensor is incorrectly connected or damaged.

Common Causes

  • Short circuit within the sensor.
  • Wiring short due to damage or moisture.
  • Incorrect sensor resistance reading.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the air conditioner at the circuit breaker.

  2. 2

    Visually inspect the air sensor and its wiring for any signs of damage or moisture causing a short.

  3. 3

    Restore power to the unit after a few minutes.

  4. 4

    If the error persists, a qualified technician is required to diagnose and repair the sensor or wiring.

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

Related Faults

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Source: Fujitsu Air Conditioners
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