Key-Disp KD21C - User Manual

Identifies the specific model of the eBike Intelligent LCD Display.

Details the technical specifications of the eBike display, including voltage and current ratings.

Provides a detailed dimensional drawing of the product in millimeters.

Lists the various functions and indications of the KD21C display for riders.

Illustrates the layout of the display, identifying different functional areas and indicators.

Explains the three primary buttons (ON/OFF, UP, DOWN) used for operating the KD21C display.

Instructions for mounting the KD21C on the handlebar and connecting it to the controller, advising to cut power first.

Details on how to turn the e-bike system on and off using the On/Off button, including auto-off.

Explains the default display and how to cycle through different indication functions using the ON/OFF button.

How to activate push-assistance by holding the DOWN button for a uniform speed of 6 Km/h.

Instructions to turn front/rear lights on/off using the UP button, affecting backlight brightness.

How to change the e-bike's assist level from 0 to 5 using UP/DOWN buttons to modify motor output power.

How to manually clear Trip Distance, Max Speed, and Avg. Speed by holding ON/OFF and DOWN buttons.

Explains the five battery power bars indicating charge level and low voltage warnings.

Information on how error codes are displayed and the need for inspection/repair if an error occurs.

How to enter the general settings menu by holding UP and DOWN buttons for 2s, emphasizing parked e-bike use.

Setting TC to Y or N to clear trip distance, with default N, and saving by pressing ON/OFF.

How to set backlight brightness to levels 1, 2, or 3 using UP/DOWN and save with ON/OFF.

Setting unit '1' for mile and '2' for kilometer using UP/DOWN, saving with ON/OFF.

How to enter General Parameter Settings by holding UP/DOWN, then DOWN/ON/OFF.

Setting wheel diameter (Ld) from various options, default 20 inch, using UP/DOWN.

Setting speed limit (LS) from 12-40 Km/h, default 25 Km/h, which auto-switches off the system if exceeded.

Introduces 8 personalized settings including battery, assist level, over-current cut, PAS sensor, speed sensor, throttle, system, and password.

How to enter Personalized Parameter Settings via General Settings and cycle through items using UP/DOWN and ON/OFF.

Setting voltage values for each of the 5 battery bars, with default VOL 1 at 31.5V, using UP/DOWN and ON/OFF.

Selecting one of 8 assist level modes (e.g., 0-3, 0-5), default 0-5, using UP/DOWN.

Customizing speed ratios for each assist level, with default ratio 50% for Level '1', using UP/DOWN and ON/OFF.

Setting the over-current cut value (CUR) from 7.0A to 22.0A, default 15A, using UP/DOWN.

Setting the direction of the Power Assist Sensor to forward ('run-F') or backward ('run-b'), default 'run-F'.

Adjusting PAS sensitivity (SCN) from 2 (strongest) to 9 (weakest), default 2, using UP/DOWN.

Setting the number of magnets on the PAS disk (N), default 12, using UP/DOWN.

Setting the number of spoke magnets (SPS) for the speed sensor, range 1-9, default 1, using UP/DOWN.

Enabling (HL-y) or disabling (HL-N) throttle push-assistance, default HL-N, using UP/DOWN.

Limiting throttle speed by assist level (HF-y) or not (HF-n), default n, using UP/DOWN.

Setting battery power delay time (DLY) to 3s, 6s, or 12s, default 3s, using UP/DOWN.

Setting the maximum speed limit (MAX SPD) from 25 Km/h to 40 Km/h, default 40 Km/h, using UP/DOWN.

Setting push-assistance (PUS) to enabled 'Y' or disabled 'N', default 'Y', using UP/DOWN.

Setting slow start up (SSP) values from 1-4, where 4 is slowest, default 1, using UP/DOWN.

Inputting the 4-digit password, default '1212', using UP/DOWN and ON/OFF.

Enabling (Y) or disabling (N) the power-on password feature, default N, using UP/DOWN.

How to change the 4-digit power-on password using UP/DOWN and ON/OFF.

Confirming input with ON/OFF, saving and exiting with ON/OFF, or canceling with DOWN.

How to recover default settings by selecting 'Y' and confirming, which resets the display to DEF-00.

Details warranty validity (24 months) and lists cases excluded from warranty coverage.

Explains the wiring sequence of the connector to the controller and display, including wire colors and functions.

Provides critical warnings for display usage, connector handling, parameter modification, and repair advice.

A table listing error codes (21-30) and their corresponding definitions like Current Abnormality, Throttle Abnormality, etc.

A table linking numbered settings items (Battery Power Bar, Assist Level, etc.) with their symbolic representations (VOL, SCA, etc.).

A table showing default assist level ratios for different level modes (0-3/1-3, 0-5/1-5, etc.) across levels 1 through 9.

A table listing various symbols (EC, bL, U, VOL, Ld, LS, etc.) and their definitions related to settings.