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Pipe Sensor Closed (AUY, ABY & AWY)

Red 3 Pulses, Green Blinks, Yellow Blinks (AUY, ABY & AWY) — Pipe Sensor Closed Circuit (Short)

Fujitsu · Air Conditioners

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

The red LED shows 3 pulses, the green LED blinks, and the yellow LED blinks. This indicates a closed circuit (short circuit) condition in the pipe temperature sensor, due to incorrect wiring or sensor damage.

Common Causes

  • Short circuit within the sensor.
  • Damaged wiring creating a short.
  • Moisture or debris causing electrical contact.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the air conditioner at the circuit breaker.

  2. 2

    Inspect the pipe sensor and its wiring for any damage, kinks, or signs of moisture.

  3. 3

    Restore power after a short period.

  4. 4

    If the error persists, contact a qualified technician to troubleshoot and repair the short circuit.

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

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Source: Fujitsu Air Conditioners
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