E16
Schumacher
Network / OCPP Communication Fault (Smart Models)
Charger shows E16; smart features may be disabled and charging may be limited or blocked.
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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
Wi‑Fi or Ethernet module failure, Antenna damage, Corrupted network configuration, Control board communication stack error
How to Fix / Troubleshooting
Safety first: Ensure the charger is idle before changing network settings.
- Reboot charger and router: Power cycle the Schumacher charger and your network router or switch.
- Check signal strength: For Wi‑Fi models, verify the charger has adequate signal. Move the router closer or add a range extender if needed.
- Reconfigure network: Use the Schumacher app or web interface to forget and re-add the Wi‑Fi network, or re-enter Ethernet settings.
- Firmware update: If possible, update firmware via USB if network is unstable.
- If E16 persists: The Wi‑Fi/Ethernet module or its interface on the control board may be faulty. Replacement of the communication module or main board by a technician is required.
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Repair Difficulty
Medium
3/5
Required Part
Wi‑Fi / Ethernet Communication Module
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