The PWR Electric Assist Manual describes an electric bicycle system, focusing on its display modes, error indicators, and button functions. This system is designed to provide an enhanced riding experience through electric assistance and clear feedback to the user.
Function Description
The PWR Electric Assist system integrates an electric motor to assist the rider, offering various levels of power assistance and displaying crucial ride information. The core functionality revolves around three main display modes: Normal Mode, Large Digit Speed Mode, and an Error display mode.
- Normal Mode: This is the standard operational display, providing a comprehensive overview of the bike's status. It shows real-time speed, battery capacity, motor power usage, power assist level, battery voltage, and distance traveled. The system differentiates between "trip distance since power on" (DST A) and "total distance the bicycle has traveled" (DST B), allowing riders to track both short-term and long-term mileage. An integrated movement indicator rotates when the bike is in motion, confirming active operation.
- Large Digit Speed Mode: To enhance readability during high-speed riding, the display automatically switches to this mode, presenting the speed in larger characters. This ensures that the rider can quickly and easily monitor their speed without distraction. While speed is prioritized, other essential information like the power assist level and trip time remains accessible.
- Error Mode: The system includes a robust error detection mechanism. If an issue occurs, an "ERR" sign appears and blinks on the display, accompanied by a specific error code. This immediate notification helps riders identify and address problems promptly.
Important Technical Specifications (Derived from Display Information)
While specific numerical technical specifications like motor wattage or battery capacity are not explicitly stated, the manual provides insights into the types of data the system monitors and displays, which are indicative of its underlying capabilities:
- Battery Monitoring: The system displays "Battery Capacity Indicator" (likely a graphical representation) and "BATT - Battery voltage" (e.g., 40.8V shown in the example). This suggests a sophisticated battery management system that tracks real-time voltage and remaining charge.
- Speed Measurement: A "Speedometer" is a core component, displaying speed in both normal and large digit formats (e.g., 1.8 M-H in Normal Mode, 22.4 M-H in Large Digit Speed Mode). The "M-H" likely stands for Miles per Hour, indicating the unit of speed measurement.
- Motor Power Indication: A "Real-Time Motor Power Indicator" uses upward bars to show higher motor power and downward bars to indicate regenerative braking power (when the battery is charging). This implies the system can both draw power from and return power to the battery, enhancing efficiency.
- Power Assist Levels: The "Power Assist Level" is adjustable from 1 to 8, offering a range of assistance options to suit different riding conditions and rider preferences.
- Distance Tracking: The system tracks two types of distance: "DST A" (trip distance since power on) and "DST B" (total distance the bicycle has traveled), providing comprehensive mileage data.
- Error Codes: The manual lists several error codes, which hint at the types of faults the system can detect:
- O1 (Over current - Latching): Indicates an overcurrent condition that requires manual clearing.
- OV (Over voltage - Non-latching): Suggests a voltage exceeding safe limits.
- UV (Under voltage - Non-latching): Points to a voltage falling below safe limits.
- T0 (Chose throttle connect to LCD. Throttle connection is short, break, or not connected.): Relates to issues with the throttle connection.
- T5 (Chose throttle connect to LCD. Throttle signal Pin short to +5V or higher power part.): Indicates a problem with the throttle signal.
- TZ (When system power on, throttle doesn't stay at zero position.): Suggests a throttle calibration or position issue.
- LCD lost communication: Points to a communication failure between the LCD and other system components.
Usage Features
The PWR Electric Assist system is designed for intuitive operation through a set of push buttons:
- "POWER" Button:
- Short Press: Toggles the backlight through a sequence of Off, Dim, Medium, and Bright settings, allowing riders to adjust display visibility based on ambient light.
- Long Press: Toggles the system between On and Standby modes, controlling the overall power state of the electric assist.
- "SET" Button:
- Short Press: Toggles between displaying "DST A" (trip distance) and "DST B" (total distance), enabling riders to view their preferred mileage metric.
- Long Press: Resets "DST A" to 0 if it is currently displayed, allowing for new trip tracking. If "DST B" is displayed, it resets the trip timer, which is likely associated with "DST A" or a separate elapsed time counter.
- "UP" & "DOWN" Buttons:
- Short Press (Each Button Separately): Adjusts the "Power Assist Boost level" from 1 to 8. The "Up" button increases the level by 1, and the "Down" button decreases it by 1, providing fine control over the motor assistance.
- Long Press (Both Buttons Together): Accesses the "Set-Up Menu," suggesting advanced configuration options for the system.
Maintenance Features
The manual highlights a specific maintenance feature related to error handling:
- Clear Over Current Protection Error: For the "O1" (Over current - Latching) error, the system requires a manual reset. This is achieved by "Short Pressing these 2 buttons together" (referring to the "POWER" and "SET" buttons, as indicated by the diagram). This action "Clears Over-Current Flag" and "Enables Motor to Drive again." This manual reset mechanism is crucial for safety, ensuring that an overcurrent condition is acknowledged and resolved before the motor is re-engaged. The non-latching errors (OV, UV) likely clear automatically once the underlying condition is resolved, but the manual does not explicitly state this. The detailed error codes themselves serve as a diagnostic tool, aiding in troubleshooting and maintenance.
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