Heidelberg
No Power / Internal Auxiliary Supply Failure
Charger’s front LEDs or display do not light up at all, unit appears dead, but upstream breaker is on.
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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
No mains voltage at charger input, Blown internal input fuse, Failed auxiliary power supply on main board, Loose input terminal connections
How to Fix / Troubleshooting
Safety first: Work on mains circuits only if you are a qualified electrician. Always verify absence of voltage before touching terminals.
- 1. Check supply:
- Verify that the dedicated breaker is ON and not tripped.
- Use a multimeter to confirm voltage at the charger’s input terminals.
- 2. Inspect input terminals:
- With power off, check that all wires are securely clamped in the input terminal block.
- 3. Internal fuse:
- Open the housing and locate any internal fuses on the main board or input stage.
- Test and replace blown fuses with identical rated parts if allowed by Heidelberg.
- 4. Auxiliary supply check:
- If mains is present and fuses are intact but no LEDs light, the auxiliary SMPS on the main control board may have failed.
- Board replacement is typically required.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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