mGYDY 36/48V 25A 750W Brushless Sine Wave KT Controller with LCD8HU Display User Manual

1. Introduction

1.1 Product Overview

This manual provides instructions for the installation, operation, and maintenance of the mGYDY 36/48V 25A 750W Brushless Sine Wave KT Controller and the KT LCD8HU Color Display. This system is designed for electric bicycle kits, offering stable speed control and sensitive response for braking and direction changes.

1.2 Key Features

• Sensitive Control: Provides stable speed and sensitive control for braking and direction changes.
• Durable Construction: Features a thicker aluminum shell for better heat dissipation and robust wiring for long-term reliability.
• Night Driving Function: LCD backlight display and headlight switch control for visibility during night rides.
• Data Display Function: Shows riding speed, single and accumulated mileage, riding timing, assist gear, motor operating power and temperature, battery voltage, power status, and brake status.
• Intelligent Power Function: Accurately reflects battery power status and records power consumption to ensure riding mileage.
• Error Code System: Automatic prompt function with different fault codes for vehicle inspection and maintenance.
• Adjustable Parameters: Allows adjustment of various parameters including battery voltage, wheel size, speed limit, and assist levels.

1.3 Important Safety Information

• Always ensure the power is off before connecting or disconnecting any components.
• Verify all connections are secure and correct to prevent damage to the controller or other components.
• This controller is designed for brushless motors and is only compatible with KT series instrument products.
• Incorrect wiring can lead to malfunction or damage. If unsure, consult a professional.
• The controller is waterproof, but avoid submerging it in water for extended periods.

2. What's in the Box

The package typically includes the following components:

• 1 x 36/48V 25A 750W Brushless Sine Wave KT Controller
• 1 x KT LCD8HU Color Display
• 1 x Display Mounting Bracket
• Mounting Screws
• Rubber Mats for Display Mounting
• 1 x User Manual (this document)

3. Setup

3.1 Controller and Display Compatibility

This controller operates using the KT protocol and requires a compatible KT protocol display. It is essential to ensure your display is a KT series instrument product for proper functionality. A 1-to-4 cable (not included) is typically needed for connection.

3.2 Controller Wiring Instructions

Connect the corresponding line interfaces as described below. Refer to the wiring diagram for visual guidance.

1. Motor Wire: Connect the black long wire from the controller to the motor.
2. Power Cord: Connect the red and black single big wires to the battery power source. Ensure correct polarity.
3. One-for-Four/One-for-Five Cable: Connect the black long wire (fine hole) to the 1-to-4 or 1-to-5 cable (9 cores) for connecting multiple accessories.
4. Light Line: Connect the black wire with a red head to the bicycle's light system.
5. Power Assist Sensor Wire: Connect the black wire with a yellow head to the power assist sensor.
6. Throttle Connection: Connect the throttle cable. Pay close attention to the red and black lines in the throttle connection; they must be connected correspondingly.
7. Phase Position Lines: Connect the blue, green, and yellow phase position lines. Ensure the colors correspond correctly between the controller and the motor.
8. Hall Sensor: Connect the Hall sensor wires, ensuring color-corresponding connections.
9. Display Connection: Connect the display cable to the designated port on the controller.
10. E-Brakes: Connect the two E-brake cables.

3.3 Display Connection and Testing

After all connections are made, you can test the display functionality.

• Power On: Long press the power button on the display to turn it on.
• Basic Display: The display will show speed, PAS level, battery level, total mileage, single mileage, light indication, single trip time, and error codes.
• USB Charging: The LCD8HU display includes a USB charge socket (5V 500mA output) for charging mobile phones.

4. Operating the KT LCD8HU Display

4.1 Basic Operation

• Power On/Off: Long press the power button to turn the display on or off.
• Adjust PAS Parameters: Use the '+' and '-' buttons to adjust the Power Assist System (PAS) parameters.
• Headlight Control: Hold the '+' button to turn on the backlight and headlights simultaneously. Hold it again to turn them off.
• 6km/h Push Mode: Hold the '-' button to enter 6km/h push mode. The vehicle will move forward with a stable speed. Release the button to exit this mode.

4.2 Parameter Settings (P01-P20)

To enter parameter setting mode, long press the '+' and '-' buttons simultaneously. Use the power button to cycle through parameters (P01-P20) and the '+' and '-' buttons to adjust values. Long press the power button to exit parameter setting mode.

Key parameters include:

• P01: Backlight brightness (1-3 levels).
• P02: Change metric (0: km, 1: mile).
• P03: Battery voltage setting (Default: 36V, adjustable for 36V/48V/60V).
• P04: Hibernate mode time (1-60 minutes, 0: never enter this mode).
• P05: Total assist levels.
• P06: Wheel size (inch).
• P07: Speed calculation.
• P08: Speed limit range.
• P09: Zero speed start (0: zero start, 1: non-zero start).
• P10: Driving mode selection.
• P11: Assist sensitivity.
• P12: Assist starting power.
• P13: Assist disc type.
• P14: Current limit of controller.
• P15: Low voltage protection setting of controller.
• P16: ODO distance reset.
• P17: Cruise mode selection.
• P18: Speed ratio.
• P19: Assist level.
• P20: Protocol selection.

5. Maintenance

5.1 General Care

• Regularly inspect all wiring connections for tightness and signs of wear or damage.
• Keep the controller and display clean. Wipe with a soft, damp cloth. Avoid harsh chemicals.
• Ensure the controller's aluminum casing is free from obstructions to allow for proper heat dissipation.

5.2 Waterproof Considerations

The controller features a waterproof design. However, to ensure longevity, avoid prolonged exposure to heavy rain or submersion in water. Always ensure connectors are dry before making or breaking connections.

6. Troubleshooting

The LCD8HU display provides error codes to assist in diagnosing issues. Refer to the manual's error code section for detailed descriptions.

6.1 Common Error Codes

6.2 General Troubleshooting Tips

• If an error code appears, first check all connections related to that error.
• Ensure the battery is adequately charged and the voltage setting (P03) on the display matches your battery.
• If the motor is not responding, check motor connections and the Hall sensor.
• For persistent issues, reset the ODO distance (P16) or consult the full manual for advanced troubleshooting.

7. Specifications

7.1 Controller Specifications

7.2 Display Specifications (KT LCD8HU)

8. Warranty and Support

8.1 Warranty Information

This product comes with a 1-Year Manufacturer's Warranty. Please retain your proof of purchase for warranty claims. The warranty covers defects in materials and workmanship under normal use.

8.2 Customer Support

For technical assistance, troubleshooting, or warranty inquiries, please contact mGYDY customer support through the retailer where the product was purchased. Please have your product model number and purchase date available when contacting support.