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18

Alarm 18 — Compressor is blocked: Low evaporation temperature

Nibe · Air Conditioning

What does 18 mean?

This alarm occurs when there are 5 repeated alarms for low evaporation temperature within 4 hours. It indicates a problem with the refrigerant system's evaporation process.

Common Causes

  • Lack of refrigerant
  • Blocked expansion valve
  • Significant wind effect

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the refrigerant level.

  2. 2

    Inspect the expansion valve for any obstructions.

  3. 3

    Evaluate if external factors like wind are affecting the system.

  4. 4

    Contact a service technician for further assistance.

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

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Source: Nibe Air Conditioning
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