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435

Inverter alarm type I 435 — Compressor is blocked: Missing phase L2

Nibe · Air Conditioning

What does 435 mean?

Phase L2 to the inverter has been missing 3 times within 3 hours or continuously for 1 hour. Check fuses and connections.

Common Causes

  • Phase L2 to the inverter has been missing 3 times within 3 hours or continuously for 1 hour
  • Main and group fuses and their cable connections
  • Incorrect connection in the inverter’s terminal block X5

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check main and group fuses.

  2. 2

    Verify cable connections to the inverter, especially terminal block X5.

  3. 3

    Ensure all phases are correctly connected.

  4. 4

    Contact a technician.

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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