A:  When the device malfunctions, identify the problem based on the following symptom descriptions and attempt resolution accordingly:
Scenario 1: Error during operation
If the device powers on normally initially but subsequently displays ‘Upgrading’ on the LCD screen during operation, accompanied by LED indicators showing E32 or E33 errors, this is typically caused by a hardware short circuit. First verify the motor wiring is correct and undamaged, then inspect the driver board for short circuits in the lower bridge or to ground.
Scenario 2: Upgrade Failure
During remote upgrades, if the LCD displays ‘Upgrading’ alongside an LED reading of ‘88888’ for over 4 minutes, this indicates upgrade failure due to communication timeout. Ensure a stable network connection and retry the upgrade. If the device reboots with an ‘A-in’ error after failure, the upgrade may be attempted again.
Scenario 3: Operation Stuttering
During factory reset or parameter backup, if the LCD screen displays ‘Upgrading’ accompanied by brief LED stuttering, this is typically caused by an outdated LCD keypad software version (e.g., V2.00). Resolve this by upgrading the LCD keypad software to a version compatible with the mainboard (e.g., V2.05 or higher).
Scenario 4: Sudden Abnormal Operation
If the LCD screen unexpectedly displays ‘Upgrading’ during normal operation while the LED remains normal, this likely indicates poor contact. Immediately inspect all cables and connectors for secure connections, attempt to reconnect them, and restart the device.
General troubleshooting principles
When encountering issues, it is advisable to first verify all physical connections are intact, followed by checking software version compatibility. Should the problem persist after these steps, please retain relevant error messages and contact technical support for further assistance.