Mennekes
Overheating of Internal Components
Charger housing becomes unusually warm or hot to the touch during normal charging.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
High contact resistance at terminal block, Undersized supply cable, Blocked ventilation, Degraded contactor contacts
How to Fix / Troubleshooting
Safety first: Turn off power and allow the unit to cool before opening.
- Check installation rating: Confirm that the supply cable size and breaker rating match the Mennekes charger’s maximum current.
- Inspect terminals: Tighten all high-current terminals (input, contactor, output) to specified torque. Look for discoloration or melted insulation indicating overheating.
- Ventilation: Ensure vents are not blocked and that the charger is not installed in direct sunlight without shading, if not rated for it.
- Replace overheated parts: If any terminal block or contactor shows signs of heat damage, replace the affected component.
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Repair Difficulty
Hard
4/5
Required Part
Input Terminal Block / Main Power Contactor
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