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OH4
Heatsink overtemperature (C0122)
Lenze · 9300 Series
Was bedeutet OH4 ?
The heatsink temperature has exceeded the threshold set in C0122. Causes include ambient temperatures above +40°C or +50°C, a dirty heatsink, an incorrect mounting position, or the value specified under C0122 being set too low.
Häufige Ursachen
- Heatsink temperature (C0122) has exceeded its critical limit, potentially leading to power module failure.
- Inadequate airflow or blocked heatsink fins on the drive's power module.
- High ambient temperature combined with heavy drive load.
- Cooling fan for the heatsink is not functioning.
Reparaturschritte & Checkliste
Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.
- 1
Allow the module to cool and ensure better ventilation within the control cabinet.
- 2
Check the ambient temperature in the control cabinet.
- 3
Clean the heatsink if it is very dirty to improve heat dissipation.
- 4
Change the mounting position if it is hindering airflow.
- 5
Enter a higher value under C0122 if the threshold is set too low.
- 6
Switch off monitoring by setting C0582 = 3.
Verifizierte technische Daten. Zuletzt aktualisiert: March 2026
Verwandte Fehlercodes
Quelle: Lenze 9300 Series