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Fan speed symbol

Fan speed symbol — Fan speed has changed from normal setting

Nibe · F1155 Heat Pumps

What does Fan speed symbol mean?

This symbol indicates that the speed of the heat pump's fan has changed from its standard setting. This requires the NIBE FLM accessory to be installed.

Common Causes

  • Automatic adjustment of fan speed.
  • System demand requiring altered fan performance.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Note the change in fan speed indicated by the symbol.

  2. 2

    Ensure the NIBE FLM accessory is correctly installed and functioning.

  3. 3

    Check if the fan speed change corresponds to specific operating conditions or modes.

  4. 4

    Consult the NIBE FLM accessory documentation if further details are needed.

Browse all codes in this manual (27)
Verified technical data. Last updated: April 2026

Related Faults

AUX output configurationAUX output configured for specific functionAdditional heat blocked symbolAdditional heat blocked symbol — Immersion heater is not runningAlarm bell iconAlarm bell icon on display — An alarm condition is active
Source: Nibe F1155 Heat Pumps
Open Manual (Page 32)Search more codes in this manual