Charger housing feels warm to hot during long charging sessions, but no error code or shutdown occurs.

Safety first: If the housing is extremely hot or smells of burning, stop charging and isolate power.

• 1. Assess temperature:
  • It is normal for the housing to be warm. If you can keep your hand on it comfortably, it is likely within spec.
• 2. Improve ventilation:
  • Ensure the charger has the clearance specified in the Heidelberg manual.
  • Avoid enclosing the unit in small cabinets without airflow.
• 3. Reduce current:
  • If possible, reduce the maximum charging current setting to lower thermal stress.
• 4. Internal cleaning (qualified):
  • With power off, open the housing and gently remove dust from heatsinks and the cooling fan using dry compressed air.
• 5. Monitor for changes:
  • If temperature continues to rise or plastic discoloration appears, have a technician inspect the power module and thermal sensors.