E18
Zencar
Smart Charging / Load Management Fault
Charger displays E18; charging stops when scheduled or smart-charging features are used.
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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 external current sensor (CT) for load management, Communication loss with home energy meter, Misconfigured load limit settings, Faulty load control firmware
How to Fix / Troubleshooting
Safety first: External CTs and meters are connected to mains; isolate power before handling.
- Check configuration: In the Zencar app or web interface, verify that load management settings (max house current, charger limit) are correctly set.
- Inspect external CTs: Ensure any Zencar-branded current transformers around the main supply conductors are correctly oriented and their cables are intact.
- Verify communication wiring: For wired meters, check RS-485 or similar communication cables for secure connections and no visible damage.
- Disable smart mode: Temporarily disable load management or smart scheduling and test if the charger operates normally in manual mode.
- If E18 only occurs in smart mode: Replace the external CT kit / energy meter or update firmware per Zencar instructions.
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Repair Difficulty
Hard
4/5
Required Part
External CT Kit / Energy Meter
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