RANDRIDE E30 Troubleshooting Guide(YX20M-2 Dual-Drive)

E30 = comms fault (controller/motor/assist/lights/throttle). 1. Remove controller. Photo the label. 2. Keep ONLY controller + display + battery. Disconnect all else. Power on. E30 stays? → Controller bad. Stop. Contact seller. E24? Connect rear motor → restart display. E24 stays? → Motor bad. E24 gone? → Connect front motor. 3. Connect throttle. No E22? Test both motors. 4. Reconnect others one by one (lights, assist, etc.). E30 returns? → That part/wiring is bad. Need help? Comment below.