Aairsk SU7 Electric Bike User Manual

1. Introduction

Welcome to the Aairsk SU7 Electric Bike user manual. This guide provides essential information for the safe assembly, operation, maintenance, and troubleshooting of your new electric bicycle. Please read this manual thoroughly before your first ride to ensure optimal performance and safety.

The Aairsk SU7 is a 24-inch electric city commuter bike designed for adults, featuring a 36V13AH lithium battery and a powerful motor for an assisted riding experience.

Figure 1: The Aairsk SU7 Electric Bike, showcasing its overall design with a 750W peak power motor and 36V13AH battery.

2. Safety Information

Your safety is paramount. Always wear appropriate protective equipment, including a helmet, when riding. Familiarize yourself with local laws and regulations regarding electric bicycles.

2.1 General Safety Guidelines

• Always perform a pre-ride check of brakes, tires, battery, and lights.
• Ride defensively and be aware of your surroundings.
• Do not ride under the influence of alcohol or drugs.
• Ensure all fasteners are tightened before each ride.
• Do not exceed the maximum load capacity of 330 lbs (150 kg).

2.2 Battery Safety

WARNING: Please mind potential fire risk and strictly follow the instruction manual for charging and storage of the lithium battery.

• Use only the charger provided with your Aairsk SU7 e-bike.
• Do not expose the battery to extreme temperatures or direct sunlight.
• Store the battery in a cool, dry place, away from flammable materials.
• Do not puncture, drop, or disassemble the battery.
• If the battery is damaged or shows signs of overheating, discontinue use immediately and contact support.

3. Package Contents

Upon receiving your Aairsk SU7 Electric Bike, please check the package for the following items:

Figure 2: The Aairsk SU7 Electric Bike as packaged in its shipping box.

Figure 3: Contents of the bike package, including the partially assembled bike, charger, pump, toolkit, reflectors, and smart keys.

• Aairsk SU7 Electric Bike (partially assembled)
• Battery Charger
• Toolkit (for assembly)
• Air Pump
• Front and Rear Reflectors
• Smart Keys for LCD Display
• User Manual (this document)

If any items are missing or damaged, please contact customer support immediately.

4. Assembly and Setup

Your Aairsk SU7 Electric Bike comes mostly pre-assembled. The following steps outline the general assembly process. A basic toolkit is included to assist you.

1. Unpacking: Carefully remove the bike and all components from the packaging. Retain packaging materials for future transport or returns.
2. Handlebar Installation: Attach the handlebars to the stem. Ensure they are centered and tightened securely.
3. Front Wheel Installation: Install the front wheel, ensuring the disc brake rotor is correctly aligned within the caliper. Tighten the wheel nuts firmly.
4. Pedal Installation: Identify the left (L) and right (R) pedals. Thread the pedals into the crank arms by hand, then tighten securely with a wrench. Note that the left pedal has a reverse thread.
5. Seat Post Installation: Insert the seat post into the frame and adjust the seat height to a comfortable riding position. Secure it with the quick-release lever or bolt.
6. Accessory Attachment: Attach the front headlight, rear reflector, and any other accessories like the rear rack if not pre-installed.
7. Initial Charge: Before your first ride, fully charge the battery. Connect the charger to the bike's charging port (located on the frame) and then to a power outlet. The indicator light on the charger will show charging status.
8. Pre-Ride Checks: Before riding, ensure tires are inflated to the recommended pressure, brakes are functioning correctly, and all bolts and quick releases are tight.

If you are unfamiliar with bike assembly, it is recommended to consult a professional bike mechanic or refer to online video tutorials for visual guidance.

5. Operating Instructions

5.1 Powering On/Off and Display

The Aairsk SU7 features an LCD display with a card key for activation.

Figure 4: LCD Display with Card Key, showing 5-Gear PAS modes and speed indicators.

• To Unlock/Power On: Touch the card key to the LCD display. The display will illuminate.
• To Lock/Power Off: Touch the card key to the LCD display again.
• The display shows current speed, battery level, PAS level, and mileage.

5.2 Riding Modes and Speed Control

The Aairsk SU7 offers three primary riding modes and 5 levels of Pedal Assist System (PAS).

Figure 5: Aairsk Class 3 E-Bike highlighting Pure Electric, Pedal-Assist, and Manual Pedal modes.

• PAS 0 (Classic Bike Mode): No electrical assistance. The bike operates like a traditional bicycle.
• PAS 1-5 (Pedal Assist System): Provides electrical assistance while you pedal. Higher PAS levels offer more power and speed.
  • PAS 1: Max. Speed 12 Mph (19 km/h)
  • PAS 2: Max. Speed 15 Mph (24 km/h)
  • PAS 3: Max. Speed 18 Mph (29 km/h)
  • PAS 4: Max. Speed 21 Mph (34 km/h)
  • PAS 5: Max. Speed 23 Mph (37 km/h)
• Pure Electric Mode (Throttle): Use the twist throttle for propulsion without pedaling. Always be mindful of local regulations regarding throttle use on public roads.
• Manual Pedal Mode (MSport Mode): Ride the bike using only pedal power, with no electrical assistance.

Important Note on Speed: While the bike is capable of reaching speeds up to 23 MPH (37 km/h) in PAS 5, the official maximum speed is stated as <25 km/h to comply with certain regulations. Always adhere to local speed limits and e-bike classifications.

5.3 Gearing

The bike is equipped with a 7-speed gearing system. Use the shifter on the handlebars to change gears according to terrain and desired pedaling effort.

5.4 Lights and Brakes

Figure 6: Details of the bike's comfort and safety features: headlight, taillight, and seat.

• Headlight: The front headlamp works directly off the main battery. Use the switch on the handlebar to turn it on/off.
• Taillight: The bike includes a rear reflector for enhanced visibility.
• Brakes: The Aairsk SU7 features dual disc brakes for reliable stopping power. Squeeze both brake levers evenly for effective braking.

Figure 7: Close-up of the dual disc brakes, emphasizing their braking power and safety features.

6. Maintenance

Regular maintenance ensures the longevity and safe operation of your Aairsk SU7 Electric Bike.

6.1 Battery Care

Figure 8: Illustration of the long-lasting battery, emphasizing its quick removal and secure re-insertion.

• Charging: Always charge the battery in a well-ventilated area. Avoid overcharging by disconnecting the charger once the battery is full. The charger plugs directly into the frame.
• Removal: The battery is designed to be removable for charging or service. It can be removed and secured in seconds.
• Storage: If storing the bike for an extended period, charge the battery to 50-70% and store it in a cool, dry place. Recharge every 1-2 months to prevent deep discharge.

6.2 General Maintenance

• Cleaning: Clean the bike regularly with a damp cloth. Avoid using high-pressure washers directly on electrical components.
• Lubrication: Periodically lubricate the chain and other moving parts with appropriate bicycle lubricant. Some parts of the bike and toolkit may require initial oiling.
• Tires: Check tire pressure before each ride. Ensure tires are free from punctures or excessive wear.
• Brakes: Regularly inspect brake pads for wear and ensure brake levers are responsive. Adjust as needed.
• Fasteners: Check all bolts, nuts, and quick releases for tightness periodically.
• Suspension: The front fork suspension helps provide a smoother ride and protects components. Keep it clean and inspect for any damage.

Figure 9: Diagram of the front fork suspension, explaining its benefits for ride comfort and component protection.

Figure 10: Comparison image showing the waterproof chain, highlighting reduced maintenance and smoother use.

7. Troubleshooting

This section addresses common issues you might encounter with your Aairsk SU7 Electric Bike.

7.1 Performance Issues

• Bike not reaching advertised speed (e.g., only 10 mph in PAS 5):
  • Check battery charge level. A low battery can reduce performance.
  • Ensure you are in the correct PAS level (PAS 5 for maximum assistance).
  • Verify tire pressure. Under-inflated tires can increase rolling resistance.
  • Consider rider weight and terrain. Hills and heavier loads will affect speed.
  • Note that the motor's rated power is 400W (peak 750W), but it may be marked as 250W for regulatory compliance. Actual performance should align with the 400W/750W figures.
• Motor not providing assistance or power:
  • Ensure the battery is fully charged and properly seated.
  • Check all electrical connections for looseness or damage.
  • Verify the display is powered on and not showing any error codes.

7.2 Display and Control Issues

• 'M' button not working:
  • Check for physical obstruction or damage to the button.
  • Ensure the display unit is securely connected.
  • If the issue persists, contact customer support.
• Headlight not turning on (holding '+' button for 3 seconds):
  • Verify the main power is on.
  • Check the headlight's physical connection and bulb (if replaceable).
  • Some models may have a dedicated switch on the handlebar for the headlight. Confirm its operation.
  • If the issue persists, contact customer support.

7.3 Mechanical Issues

• Front tire disc brake touching the shock/improper wheel fitment:
  • This indicates incorrect front wheel assembly. Re-check the alignment of the disc rotor within the caliper.
  • Ensure the wheel nuts are properly tightened on both sides and the axle is fully seated in the fork dropouts.
  • If the middle center rod for screws appears too small or safety clips are missing, this suggests a manufacturing defect or missing parts. Do not ride the bike and contact customer support immediately.
• Brakes feel weak or require excessive squeeze:
  • Inspect brake pads for wear.
  • Check brake cables for proper tension and lubrication.
  • Ensure disc rotors are clean and free of oil or grease.
  • Brakes may require bedding in during initial use.

For any issues not covered here, or if troubleshooting steps do not resolve the problem, please contact Aairsk customer support.

8. Specifications

Figure 11: A diagram illustrating the 24-inch E-Bike dimensions, including seat height, overall length, handlebar height, weight, and maximum load capacity.

9. User Tips

Here are some helpful tips from other Aairsk SU7 riders:

• Suitability for Shorter Riders: This bike is noted to be excellent for shorter individuals, fitting riders around 5'0" to 5'2" comfortably due to its frame design and adjustable seat.
• Throttle Safety: The twist throttle is convenient but can be accidentally engaged. Always turn the power to zero or switch off the throttle before dismounting or when stationary to prevent unintended acceleration.
• Battery Removal for Storage: While the battery is designed to be removable, some users find it less straightforward. For winter storage, it's recommended to remove the battery and bring it indoors to protect it from cold temperatures.
• Brake Feel: The mechanical disc brakes may require a firm squeeze for optimal stopping power. Ensure they are properly adjusted and bedded in.
• PAS Responsiveness: The Pedal Assist System (PAS) may not be the most immediately responsive. Be aware of this when starting or changing assistance levels.
• Hill Performance: As a 36V system, the bike performs well in city commuting but may require more effort on steeper hills.

10. Warranty and Support

For warranty information, please refer to the documentation provided at the time of purchase or contact the seller directly. Keep your proof of purchase for any warranty claims.

If you require technical assistance, have questions about maintenance, or need to report a defect, please contact Aairsk customer support through your purchase platform.

11. Disclaimer

Please mind potential fire risk and strictly follow the instruction manual for charging and storage. While using the product, please wear protective equipment and fully comply with the applicable law and regulations.