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Weak airflow - Auto mode monitoring

Weak airflow (Auto mode) — During monitoring operation

Fujitsu · Air Conditioners

What does Weak airflow - Auto mode monitoring mean?

In Auto mode, during the monitoring operation phase, the fan rotates at a very low speed. This is to sense room conditions before the unit selects an optimal operating mode (cooling or heating).

Common Causes

  • Normal operating behavior in Auto mode during its initial monitoring phase.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    This is normal operating behavior for the Auto mode of your air conditioner.

  2. 2

    The fan speed will automatically adjust once the unit determines the appropriate operation mode.

  3. 3

    Allow the unit to continue its monitoring cycle; no intervention is required.

Browse all codes in this manual (118)
Verified technical data. Last updated: April 2026

Related Faults

11Error 11 — Serial communication error (Indoor unit not sending signal)12Error 12 — Wired Remote Controller Communication Error18Error 18 — External communication error
Source: Fujitsu Air Conditioners
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