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Alarm numbers 70-99

Alarm numbers 70-99 — Communication interrupted

Nibe · Ground Source Heat Pumps

What does Alarm numbers 70-99 mean?

Alarms in the range of 70 to 99 typically indicate a loss of communication between system components. These alarms reset automatically once communication is restored.

Common Causes

  • Communication cable issue
  • Network problem
  • Component failure impacting communication

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check all communication cable connections.

  2. 2

    Verify the network status if applicable.

  3. 3

    Restart the system to attempt re-establishing communication.

  4. 4

    If communication does not resume, contact your installer.

Browse all codes in this manual (49)
Verified technical data. Last updated: April 2026

Related Faults

Alarm bell in displayAlarm bell symbol in display — Malfunction detectedAlarm no. 54Alarm no. 54 — Motor protection breaker trippedAnti-freeze 180Anti-freeze 180 — Anti-freeze protection active
Source: Nibe Ground Source Heat Pumps
Open Manual (Page 46)Search more codes in this manual