Charging session stops or will not start; display or app shows E02 overcurrent or overload fault.

Safety first: Turn off the circuit breaker feeding the JuiceBox before opening the enclosure or touching internal wiring.

• Verify circuit rating and app settings: In the JuiceNet / JuiceBox app, confirm the maximum current setting does not exceed 80% of the branch circuit rating (e.g., 40 A max on a 50 A circuit). Reduce the setting and retry charging.
• Inspect the J1772 cable: With power OFF, check for melted insulation, hot spots, or cuts along the cable. If any damage is found, replace the J1772 charge cable assembly before further use.
• Check for overheating at terminals: Remove the front cover (power OFF). Inspect the line and neutral (or line-line) terminals on the input block and the output relay/contactor. Look for discoloration, melted plastic, or loose screws. Tighten terminal screws to manufacturer torque specs if slightly loose; replace any burned terminal block or contactor.
• Test with reduced current: Set the charger to a lower current (e.g., 16 A) and attempt a session. If it works at low current but trips at higher current, suspect a weak main power relay/contactor or undersized wiring causing voltage drop and heat.
• Persistent E02: If the fault appears immediately even at low current and the cable is intact, the current sensor or main control board may be defective. Contact a qualified technician or JuiceBox support for board replacement.