1. Introduction
The Varstrom SW2-M58 is a high-quality LCD display designed for electric bicycles, providing essential riding information and control over your ebike system. This display is specifically engineered for compatibility with BAFANG UART protocol motors, ensuring seamless integration and reliable performance. Its robust, waterproof design makes it suitable for various riding conditions.
2. Setup and Installation
2.1 Compatibility Check
IMPORTANT: This SW2-M58 Display is ONLY compatible with BAFANG motors that use the UART Protocol. It is NOT compatible with CAN Protocol motors or motors from other brands unless specified.
Ensure your ebike motor is one of the following:
- BAFANG BBS01 Mid Drive Motor
- BAFANG BBS02 Mid Drive Motor
- BAFANG BBSHD Mid Drive Motor
- BAFANG Hub Motor
- SUTTO Hub Motor
2.2 Mounting the Display
- Select a suitable position on your handlebar for the display.
- The display holder is compatible with handlebar sizes: 31.8mm, 25.4mm, and 22.2mm. The remote button is designed for 22.2mm handlebars.
- Securely attach the display and remote button to the handlebar using the provided clamps and screws. Ensure they are positioned for easy visibility and access during riding.
2.3 Electrical Connection
- Locate the 5PIN Female connector on the display cable.
- Connect this to the corresponding 5PIN Male connector from your BAFANG UART motor system. Ensure the connection is firm and secure.
- The cable length is approximately 233mm.
3. Operating Instructions
3.1 Power On/Off
Press and hold the Power button (usually marked 'M' on the remote) to turn the display on or off.
3.2 Display Functions Overview
The 3.8-inch LCD screen provides a clear view of various riding parameters:
- Speed: Real-time speed display (mph/km/h).
- Battery Percent/Voltage: Indicates remaining battery charge, shown as both a percentage and bars.
- PAS Level: Current Pedal Assist System level (0-9).
- Total Mileage (ODO): Total distance traveled by the ebike.
- Trip Mileage (TRIP): Distance traveled during the current ride.
- Average Speed (AVG): Average speed of the current ride.
- Max Speed (MAX): Maximum speed reached during the current ride.
- Headlight Indicator: Shows if the ebike's headlight is on.
- Walk Assist Mode: Activates a low-speed assist for walking the bike.
- Error Code: Displays specific codes if a system error occurs.
- Low Voltage Warning: Alerts when battery voltage is low.
3.3 Adjusting PAS Levels
Use the '+' and '-' buttons on the remote to increase or decrease the Pedal Assist System (PAS) level. The display supports 9 PAS levels (0-9), which can also be configured to 3 or 5 levels in advanced settings.
3.4 Advanced Settings
To access advanced settings, a password is required. The default advanced settings password is 1919. Refer to the specific BAFANG motor controller manual for detailed instructions on navigating and modifying advanced parameters.
3.5 Brightness Adjustment
The display brightness can be adjusted from level 1 to 5. Consult your ebike's main controller manual or the display's advanced settings for specific steps to change brightness.
4. Maintenance and Care
4.1 Cleaning
The display has an IP65 waterproof rating, meaning it is protected against dust and low-pressure water jets. To clean, wipe the screen and casing with a soft, damp cloth. Do not use abrasive cleaners or high-pressure water jets directly on the display.
4.2 Operating and Storage Conditions
- Operating Temperature: -20°C to 45°C (-4°F to 113°F)
- Storage Temperature: -30°C to 80°C (-22°F to 176°F)
Avoid exposing the display to extreme temperatures outside these ranges for prolonged periods to prevent damage.
5. Troubleshooting
5.1 Common Issues and Solutions
| Problem | Possible Cause | Solution |
|---|---|---|
| Display does not power on | Loose connection, low battery, faulty wiring | Check all cable connections, ensure battery is charged, inspect wiring for damage. |
| Error code displayed | System malfunction, sensor issue | Note the error code and consult your BAFANG motor controller manual for specific diagnostics. |
| Incorrect speed/mileage readings | Wheel circumference setting incorrect, speed sensor issue | Check wheel circumference setting in advanced settings. Inspect speed sensor for proper placement and function. |
| PAS levels not changing | Remote button issue, controller communication problem | Ensure remote buttons are functioning. Check connections to the motor controller. |
| Low voltage warning persists | Battery truly low, battery fault, display calibration issue | Charge battery fully. If issue persists, test battery or consult a technician. |
5.2 Compatibility Issues
If the display is not functioning at all or showing persistent communication errors, double-check that your motor is a BAFANG motor utilizing the UART protocol. The display is not compatible with CAN protocol motors or other brands.
6. Specifications
| Feature | Specification |
|---|---|
| Model | SW2-M58 |
| Indicator Panel | LCD |
| Type | Display |
| Screen Size | 3.8 inches |
| Connector | 5PIN Female |
| Protocol | UART |
| Compatible Motor | BAFANG BBS01/BBS02/BBSHD Mid Drive Motor, BAFANG Hub Motor, SUTTO Hub Motor (UART Protocol only) |
| Compatible Voltage | 24V/36V/48V/52V |
| PAS Level | 9 PAS (configurable to 3 or 5) |
| Compatible Handlebar Size | 31.8mm / 25.4mm / 22.2mm (Button 22.2mm) |
| Waterproof Rating | IP65 |
| Rated Operating Current | 10mA |
| Max. Output Current | 30mA |
| Operating Temperature | -20°C ~ 45°C |
| Storage Temperature | -30°C ~ 80°C |
| Speed Limited | 0-100Km/h |
| Brightness | 1-5 Optional |
| Advanced Settings Password | 1919 |
| USB Port | No |
| Light-sensitive | No |
| Cable Length | 233mm |
| Dimensions (L*W*H) | 93.4mm * 56.4mm * 6.4mm |
7. User Tips
- Battery Display: The SW2-M58 display shows the battery level both as a percentage and with graphical bars, providing a comprehensive view of your remaining charge.
- Advanced Settings: Remember the default password '1919' for accessing advanced settings. Be cautious when changing parameters to avoid unintended behavior.
- Motor Compatibility: Always confirm your BAFANG motor uses the UART protocol before connecting the display to ensure proper function and avoid damage.
8. Warranty and Support
This Varstrom SW2-M58 Ebike Display is manufactured to high-quality standards. For any issues not covered in this manual, or for warranty claims, please contact the seller or manufacturer directly. Provide your product model (SW2-M58) and a detailed description of the issue for efficient support.