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Periodic increase or lux mode symbol

Periodic increase or lux mode symbol — Hot water boost is active

Nibe · Air Conditioning

What does Periodic increase or lux mode symbol mean?

This symbol appears in the display when a periodic increase or 'lux mode' for hot water is activated, meaning the system is preparing extra hot water.

Common Causes

  • Hot water boost is manually activated

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    No action is usually required; this is a normal operating status.

  2. 2

    Check the settings if this activation is not intended.

  3. 3

    Refer to the manual for details on managing hot water settings.

Browse all codes in this manual (95)
Verified technical data. Last updated: April 2026

Related Faults

107Sensor flt: BT7 HW sens top 107 — Sensor fault: Hot water sensor151Sen flt: CL11- BT51 pool temp sensor 151 — Sensor fault: Pool temperature sensor152Sen flt: CL12- BT51 pool temper- ature sensor 152 — Sensor fault: Pool temperature sensor
Source: Nibe Air Conditioning
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