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8、 No power is displayed on the meter, while the motor runs normally. (1) Causes: ① No voltage between the positive and negative leads of the meter, and a short circuit in the wires or connectors, ② Meter damaged. (2) Troubleshooting: Set the multimeter to the corresponding gear and use it to test the positive and negative voltage of the meter. If the…

7、 The tricycle runs once powered on, with fast acceleration (known as “sharp speeding”). (1) Causes: ① Throttle damaged or cathode wire (black) open circuit or poor connectors, ② Controller  malfunctioning (2) Troubleshooting: ① Disconnect the throttle. If it is normal, the controller is normal, and the throttle and cathode wire should be checked. If the tricycle does not…

6、There is abnormal motor sound (1) Causes: ① Large bearing clearance inside the motor, ② Motor and rotor friction, ③ Magnetic steel loosening and falling off, ④ Axial endplay inside the motor, ⑤ Brush motor commutator oxidized, burned, oily, uneven on the surface, and loose commutator segment, ⑥ Loose and misaligned brush holder (2) Troubleshooting: ① Replace the bearing. ② Repair the stator and rotor again. ③ Re-bond the magnetic…

5、 The motor jitters during operation Brushless motor: (1) Causes: ① Poor motor Hall connectors, ② Poor throttle contact, ③ Interference in the speed signal wire (2) Troubleshooting: ① Re-connect the motor Hall connectors. ② Re-connect the throttle connector. ③ Replace the controller and the meter to eliminate the interference. Tips: Generally electric tricycle jitter during use is caused by the poor contact of motor Hall…

4、The motor speed is insufficient (1) Causes:  ① Throttle damaged, ② Insufficient battery capacity or charging failure, ③ Controller malfunctioning, ④ Motor malfunctioning (2) Troubleshooting ① Detect the signal wire (green) voltage of the throttle; the terminal voltage should be 4.2V when the throttle is at its maximum angle. If less than 4.2V, the electrode will slow down, and the throttle should…

3、 The motor does not run and the meter has no display (1) Causes:  ① Cartridge fuse burnt out, ② Battery damaged, ③ Cold joint and open circuit of battery wire, ④ Ignition lock damaged, ⑤ Poor battery contact or plug contact  (2) Troubleshooting: Test the output voltage of the battery with a multimeter. If no voltage, check the cartridge fuse, fuse…

2、 The motor runs intermittently (1) Causes:  ① Battery in undervoltage critical state, ② Poor battery contact, ③ Throttle wire damaged, but not broken, ④ Brake power-off switch malfunctioning, ⑤ Ignition lock damaged and in poor contact, ⑥ Circuit connectors poorly connected, ⑦ Components in the controller not soldered properly, ⑧ Cold joint of carbon brush and conductor group in the motor (2) Troubleshooting: ① Test the battery…

1、 The meter has normal display but the motor does not run. (1) Causes:  ① Brake lever damaged, ② Throttle damaged, ③ Motor damaged, ④ Controller damaged (2) Troubleshooting: ① Generally rain and moisture are more likely to cause short circuit in the connector. Unplug the brake lever socket (normally-on lever). If the motor runs, it is a…

(2) Maintenance and maintenance of lithium batteries 1. When the lithium battery electric vehicle is used for the first time, the battery must be deeply charged, and the charger will continue to charge after the green light is displayed. For transportation safety, the battery is in a half-charged state when…

(1) Maintenance and maintenance of lead-acid batteries   1. Power loss during storage is prohibited     It is strictly forbidden to be in a state of power loss when the battery is stored. The state of power loss means that the battery is not charged in time after use. Storing the battery…