| The voltmeter shows no indication after power is connected. | 1. Poor contact of the battery terminal connection wires. | 1. Re - tighten.
|
| 2. The fuse is blown after the connection wire is short - circuited. | 2. Locate the short - circuit point and replace the fuse.
|
| 3. The voltmeter wire is disconnected or broken. | 3. Re - solder. |
| There is a voltage indication, but the vehicle won't start. | 1. The braking power - off switch is damaged or not reset. | 1. Replace the switch or re - adjust and re - tighten the reset position. |
| 2. The ignition switch plug has poor contact. | 2. Re - charge or check if the battery is faulty. |
| 3. The voltage of the ignition switch is too low and the contactor does not engage. | 3. Replace the speed regulator. |
| 4. The motor wire is disconnected. | 4. Re - connect. |
| There is high - speed but no low - speed operation. | 1. The speed regulator is damaged. | 1. Replace the speed regulator. |
| 2. The contactor contacts are burnt out. | 2. Replace the contact points. |
| 3. The brake switch is damaged. | 3. Repair or replace the brake switch. |
| Unable to charge. | 1. The charging fuse is damaged. | 1. Replace the fuse. |
| 2. The rectifier bridge is damaged. | 2. Replace the rectifier bridge. |
| 3. The charging switch is damaged. | 3. Replace the switch. |
| The braking is abnormal. | 1. The two brakes are not synchronized. | 1. Adjust the rear - brake adjusting screws on both sides. |
| 2. The brake pads are worn. | 2. Replace the brake pads. |
| The chain is disengaged. | 1. The chain is too loose. | 1. Adjust the tightness of the chain. |
| 2. The motor adjustment is tilted. | 2. Adjust the angle of the motor. |
| The motor does not rotate and has no power. | 1. The carbon brushes are worn. | 1. Replace the carbon brushes. |
| 2. The commutator is worn or the rotor is burnt out. | 2. Replace the rotor. |
| 3. The motor is burnt out. | 3. Replace the motor. |
| The electric tricycle runs out of control. | 1. The throttle grip is damaged or the ground wire is disconnected. | 1. Replace the throttle grip or reconnect the ground wire properly. |
| 2. The controller is damaged. | 2. Replace the controller. |
| The electric tricycle can only move forward but not backward. | 1. The forward and reverse switch is damaged. | 1. Replace the forward and reverse switch. |
