E17
Hyundai
Low Voltage Power Supply Fault (SMPS Error)
The charger shows E17, and the display or LEDs behave erratically.
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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
Failed internal switch‑mode power supply (SMPS) on the control board, Short on a low‑voltage rail (5 V or 12 V), Overloaded accessory (e.g., Wi‑Fi module drawing too much current), Aging electrolytic capacitors on the SMPS.
How to Fix / Troubleshooting
Safety first: Turn off power before opening the charger. SMPS circuits can retain charge; avoid touching capacitors.
- Visual inspection: Look for bulging or leaking capacitors on the control board’s power supply section.
- Disconnect accessories: If possible, temporarily disconnect non‑essential modules (Wi‑Fi, RFID) to see if the fault clears when power is restored.
- Check for burnt smell: A strong odor near the SMPS area indicates component failure.
- Board‑level repair is not recommended: Replace the entire main control board or SMPS module as specified by Hyundai.
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Repair Difficulty
Professional Required
5/5
Required Part
Low Voltage Power Supply / Main Control Board
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