Learn how to troubleshoot and fix the CP Fault on an Enphase IQ EV Charger during Tesla sessions.
CP Fault indicates a communication issue between the charger and the vehicle. This can occur due to various reasons including connection problems.
To reset the charger, disconnect it from power for a few minutes and then reconnect. This can help clear temporary faults.
The CP Fault is triggered by the inverter's safety mechanisms to protect both the EV charger and the connected electric vehicle. This fault may arise from ground fault detection, where the inverter measures insulation resistance (RISO) to identify any leakage currents that could indicate a fault condition. Additionally, if the grid frequency limits are exceeded or if there are communication errors between the inverter and the charger, the system will halt operation to prevent potential damage or safety hazards.
During a charging session with a Tesla, the Enphase IQ EV Charger will display a CP Fault on the LED indicator, which may blink in a specific pattern indicating the fault. The Enphase monitoring app may also send a notification about the CP Fault, and users might notice a drop in charging efficiency or complete interruption of the charging process.
Always ensure that any troubleshooting or repairs are performed by a licensed electrician or certified solar installer to maintain safety and compliance with local codes.
To avoid encountering a CP Fault in the future, ensure that all connections are secure and regularly inspected for wear and tear. Implement routine maintenance checks on the grounding system and wiring insulation to comply with NEC standards. Additionally, keep the firmware of the IQ EV Charger and inverter updated to the latest version for optimal performance.