1. Introducció
This manual provides essential information for the installation, operation, and maintenance of your Engwe DC48V Motor Controller, model JH48V6G. This intelligent controller is designed for electric bicycles, managing power delivery to the motor and supporting various operational functions. Please read this manual thoroughly before installation and use to ensure proper function and longevity of the product.

Figure 1: Engwe DC Motor Controller (JH48V6G)
2. Especificacions
| Característica | Especificació |
|---|---|
| Nom del producte | Controlador intel·ligent per a bicicletes elèctriques |
| Model | JH48V6G |
| Número de producte | JH4AZ2159DZLYD |
| Voltage | DC48V (Compatible with 24V/36V/48V Power Supply) |
| Corrent nominal de treball | 6~25A |
| Corrent màxima de treball | 30 mA |
| Corrent del controlador | 14 ± 2A |
| Corrent de fuita fora d'estat | |
| Undervoltage Protecció | 36 ± 2V |
| Temperatura de treball | -20 ℃ ~ 60 ℃ |
| Temperatura d'emmagatzematge | -30 ℃ ~ 70 ℃ |
| Funcions | Three gears/modes, Low brake assist |

Figure 2: Controller Label with Specifications
3. Configuració i instal·lació
The Engwe DC Motor Controller is a customized product designed for specific e-bike systems. Professional installation is highly recommended. Ensure your e-bike's battery voltage and motor specifications are compatible with this controller (DC48V).
Esquema de cablejat acabatview
The controller comes with a pre-wired harness designed for integration into your e-bike's electrical system. Each connector is typically labeled or color-coded for specific functions. Refer to the diagram below for a general understanding of the wiring components.

Figure 3: Controller Wiring Harness
Passos d'instal·lació (orientació general):
- La seguretat primer: Disconnect the e-bike's battery before beginning any installation work.
- Muntatge: Securely mount the controller in a protected area on your e-bike, away from direct water exposure and excessive vibration. Ensure adequate airflow for cooling.
- Connecteu els cables del motor: Connect the motor phase wires (usually thicker wires) from the controller to the corresponding motor wires. Ensure correct phase matching.
- Connect Hall Sensor Wires: Connect the Hall sensor wires (usually thinner wires) from the controller to the motor's Hall sensor connector.
- Connect Battery Wires: Connect the main power wires (red for positive, black for negative) from the controller to the e-bike battery. Double-check polarity.
- Connect Throttle/Pedal Assist Sensor (PAS): Connect the throttle and/or PAS sensor wires to their respective connectors on the controller.
- Connect Brake Levers: Connect the brake lever wires (if applicable) to the controller. This allows the motor to cut off power when brakes are applied.
- Connect Display/Control Panel: Connect the display or control panel wires to the controller.
- Comprovació final: Before reconnecting the battery, visually inspect all connections to ensure they are secure and correctly matched.
- Prova: Reconnect the battery and perform a low-speed test to verify proper operation.
If you are unsure about any part of the installation, consult with a qualified e-bike technician.
4. Instruccions de funcionament
Once the controller is correctly installed and powered on, it will manage the electric motor's functions based on your e-bike's input devices (throttle, pedal assist sensor, brake levers).
Operational Modes (Three Gears)
The controller supports three distinct operational modes, often referred to as 'gears' or 'power levels'. These modes typically adjust the maximum power output or speed limit of the motor. You can usually switch between these modes using a button on your e-bike's display or control panel. Consult your e-bike's specific user manual for details on how to select these modes.
- Mode 1 (Low): Provides lower power assistance, suitable for casual riding, maximizing range, or navigating crowded areas.
- Mode 2 (Medium): Offers balanced power and speed, ideal for general commuting and varied terrain.
- Mode 3 (High): Delivers maximum power assistance for higher speeds, climbing steep inclines, or rapid acceleration.
Assistència de frenada
The controller features a low brake assist function. When the brake levers are engaged, the controller will cut power to the motor, ensuring safe deceleration and stopping. This function is crucial for rider safety.
5. Manteniment
To ensure the longevity and optimal performance of your Engwe DC Motor Controller, follow these general maintenance guidelines:
- Mantenir net: Regularly clean the exterior of the controller to prevent dust and dirt buildup, which can hinder heat dissipation. Use a dry or slightly damp tela. No utilitzeu productes químics aggressivs ni submergiu en aigua.
- Inspeccionar connexions: Periodically check all wiring connections to ensure they are secure and free from corrosion. Loose connections can lead to intermittent power or damage.
- Eviteu l'exposició a l'aigua: While designed for outdoor use, avoid prolonged exposure to heavy rain or submersion in water. Water ingress can severely damage the internal electronics.
- Gestió de la temperatura: Ensure the controller is mounted in a location that allows for proper heat dissipation. Avoid covering it with insulating materials during operation.
- Inspecció professional: If you notice any unusual behavior, sounds, or smells from the controller, have it inspected by a qualified technician.
6. Solució De Problemes
This section provides basic troubleshooting steps for common issues. For complex problems, consult a professional e-bike technician.
Problemes comuns i solucions:
- El motor no respon:
- Comproveu el nivell de càrrega de la bateria.
- Verifiqueu que totes les connexions d'alimentació siguin segures.
- Inspect throttle and PAS sensor connections.
- Ensure brake levers are not engaged (some systems prevent motor operation if brakes are active).
- Potència intermitent:
- Check for loose wiring connections, especially main power and motor phase wires.
- Inspect for any signs of corrosion on connectors.
- Motor Runs Erratically:
- Verify Hall sensor wire connections are correct and secure.
- Ensure motor phase wires are correctly matched.
- Controller Overheating:
- Ensure the controller is not covered and has adequate ventilation.
- Avoid prolonged high-power usage, especially on inclines, if the motor or controller feels excessively hot.
7. Garantia i Suport
This product is covered by a manufacturer's warranty. Please retain your proof of purchase for any warranty claims.
Exclusions de garantia:
La garantia no cobreix els danys derivats de:
- Man-made damage or misuse.
- Water ingress or exposure to excessive moisture.
- Cut wires or unauthorized modifications.
- Opening the controller casing.
- Improper installation or incompatible components.
If you receive a defective product, do not sign the shipping bill. Take photos of the defective item and contact the seller immediately for assistance.
Consells per a usuaris:
- Always ensure your e-bike's battery is fully charged before long rides to prevent unexpected power loss.
- Regularly check tire pressure and brake function for optimal safety and performance.
- Consider carrying basic tools for minor adjustments during rides.





