E18
ABL DC Residual Current Sensor Fault

ABL charger shows E18; charging is disabled and the unit may indicate a DC residual current sensor error.

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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

Open circuit or failure of integrated DC residual current sensor, Loose sensor connector, Magnetic interference from nearby conductors, Faulty sensor interface on main control board

How to Fix / Troubleshooting

Safety: The DC residual current sensor is a critical safety component. Do not bypass it.

Steps:

  • Turn OFF power and open the charger.
  • Locate the DC sensor: Typically a ring‑type sensor through which the phase and neutral conductors pass.
  • Check connector: Ensure the sensor cable is securely connected to the main control board.
  • Inspect routing: Verify that only the intended conductors pass through the sensor and that no additional cables are routed too close, which could cause interference.

Repair: Replace the DC residual current sensor assembly if defective. If E18 persists, the sensor interface on the main control board may require board replacement.

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Repair Difficulty

Professional Required 5/5

Required Part

ABL DC residual current sensor
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