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FlySky VK-R4A - User Manual

FlySky VK-R4A
24 pages
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VK-R4A&
HRZ00015
Copyright ©2021 Flysky Technology co., ltd
USER MANUAL
Digital Proportional Radio
Control System

Questions and Answers

  • P
    pwebsterAug 6, 2025
    What to do if FlySky Remote Control motor won't start and red LED flashes?
    • G
      gloriasandersAug 6, 2025
      If the FlySky remote control motor doesn't start and the red LED flashes quickly after powering on, the throttle channel of the radio might be shifted or changed. Adjust the throttle channel of the radio to match the existing neutral point until the red light stops flashing.
  • C
    Carolyn WilliamsAug 12, 2025
    How to fix FlySky Remote Control when motor won't start and indicator light is off?
    • M
      Mr. Marcus Bentley DDSAug 12, 2025
      If the motor doesn't start and the indicator light is off after powering on your FlySky remote control, it could be that the ESC has no working voltage. Check the connection between the battery and ESC for any issues, and inspect the relevant plug for faulty welding. If the ESC switch or the ESC itself is damaged, return it to the factory for inspection.
  • K
    Kathleen DuffyAug 18, 2025
    What to do if FlySky Remote Control motor suddenly stops rotating?
    • D
      danielberryAug 18, 2025
      If the motor suddenly stops during rotation, it could be due to a lost throttle signal. Check the radio and receiver. Alternatively, the ESC might be in low voltage or overheat protection mode, indicated by a flashing red light. In this case, examine the battery voltage and ESC temperature.
  • T
    Theodore DouglasAug 25, 2025
    Why FlySky Remote Control car goes in reverse when I push forward?
    • A
      Abigail ReynoldsAug 25, 2025
      If your car reverses when you push forward on the FlySky remote, it could be due to the connection sequence between the ESC output line and the motor line. Try exchanging the position of two motor lines. Another possibility is that the throttle direction on the radio is set incorrectly; set the throttle direction to the opposite direction.
  • B
    Brian WilliamsAug 30, 2025
    What to do if FlySky Remote Control motor accelerates rapidly and then stops?
    • D
      Dylan PachecoAug 30, 2025
      If the motor accelerates rapidly when it starts and then stops, it may be due to insufficient battery discharge capacity. Try replacing the battery with one that has a stronger discharge capacity. It could also be that the motor's rotation speed is too high, and the gear ratio is not reasonable. In this case, replace the motor with a low-speed motor or increase the reduction ratio.

Summary

Safety

Safety Symbols Explained

Details safety symbols like Danger, Warning, and Attention, outlining potential risks.

Safe Operation Guidelines

Provides crucial guidelines for safe product operation, including prohibited and mandatory actions.

Product Introduction

Transmitter Component Overview

Identifies and illustrates the various components of the Flysky transmitter with diagrams.

Receiver Component Overview

Presents a detailed overview of the Flysky receiver, including its diagram and components.

Getting Started

Transmitter Battery Installation

Step-by-step guide for installing AA batteries correctly into the transmitter.

Operating Instructions

System Power On Procedure

Instructions for turning on the transmitter and receiver in the correct sequence.

Transmitter LED Indicators

Explains the meaning of the R.LED, G.LED, and battery power level indicator lights.

Transmitter-Receiver Binding

Procedure for binding the transmitter and receiver, essential for initial setup or replacement.

Steering and Throttle Calibration

Guide to calibrating the steering wheel and throttle trigger for neutral positioning.

System Power Off Procedure

Safe steps for powering down the transmitter and receiver system.

System Functions

Transmitter Channel Allocation

Describes the functions assigned to each of the transmitter's four channels.

Channel Direction Reversal

How to reverse the direction of input for channels CH1 and CH2.

Steering and Throttle Trim Functions

Usage of ST.TRIM and TH.TRIM for fine adjustment of steering and throttle.

Servo Travel Adjustment (D;R)

Adjusting servo travel range using the D/R function for various channels.

Mode Switching for Functions

Switching operational modes to reassign ST.TRIM and ST.D/R buttons.

Failsafe Protection Mechanism

Explains the failsafe function to prevent unexpected model behavior on signal loss.

Beginner Mode Operation

Details the beginner mode, limiting throttle to 50% for new users.

Receiver Functions

Important Receiver Precautions

Critical safety and installation considerations for the receiver.

Receiver Setup and Operation Guide

Guidance on connecting equipment and performing the initial boot-up process.

Re-binding Receiver Instructions

Reference to section 4.3 for instructions on re-binding the receiver.

Receiver Protection Features

Description of low voltage, overheat, signal loss, and self-check protection.

Battery Power Level Alarm

How the receiver indicates battery power status using LED indicators.

Vehicle Light Control

Controlling car lights and signals using transmitter functions.

Receiver Failsafe Settings

Configuration of receiver failsafe behavior upon loss of transmitter signal.

Product Specifications

Transmitter Technical Specifications

Detailed technical data for the transmitter, including RF, distance, and dimensions.

Troubleshooting Common Issues

Package Contents

Regulatory Certification

Declaration of Conformity (DoC)

Confirms Radio Equipment compliance with RED 2014/53/EU.

CE Radio Frequency Warning

Warning regarding antenna placement for CE compliance and RF exposure.

FCC Compliance Statement

FCC rules for Class B digital devices and RF exposure limits.

Environmentally Friendly Disposal

FlySky VK-R4A Specifications

General IconGeneral
BrandFlySky
ModelVK-R4A
CategoryRemote Control
LanguageEnglish

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