| Code | Display Text | Meaning | Exclusive Fix | | :--- | :--- | :--- | :--- | | | Input Over-Voltage | Input > 28V | Get a regulated 24V supply. | | E-07 | Reverse Polarity | Battery cables swapped | The YYK525 has MOSFET protection; simply reverse the leads. No damage. | | E-12 | Thermal Throttle | Internal temp > 70°C | Improve airflow. The fan curve is linear; it spins up at 65°C. | | E-24 | Ground Loop Detected | USB data ground conflict | Use an isolated USB hub. This is exclusive to the Pro variant. | | E-88 | EEPROM Corrupt | Settings lost | Enter Factory Reset via the hidden menu: Power off, then Power on + Triple-tap FN. |
: Discontinue use immediately if you experience physical discomfort or pain in the ear. yyk525 user manual exclusive