Charger shows E08 and stops charging shortly after start; may be accompanied by a clicking contactor.

Safety first: The CTs are around live conductors. Turn off power and verify zero voltage before opening the enclosure.

• Locate CTs: Inside the Sun Country Highway charger, identify the current transformers (small ring-shaped sensors around the output conductors).
• Check connectors: Ensure the CT leads are firmly plugged into the control board header. Reseat the connectors to clear any poor contact.
• Inspect wiring: Look for pinched, cut, or disconnected CT wires, especially near cable ties or sharp edges. Repair or replace damaged harnesses.
• CT orientation: Verify that the CTs are installed in the correct orientation and around the correct conductors as per the wiring diagram. Incorrect installation can cause erroneous readings.
• Replace faulty CT or board: If wiring and connectors are intact but E08 persists, the CT itself or the board’s current sensing circuit may be defective. Replace the CT assembly first; if the issue remains, replace the control board.