Addmotor GRANDTAN CITY Common Problems and Troubleshooting

Welcome to our troubleshooting guide for the Addmotor GRANDTAN CITY Electric Bike. In this article, we’ll address common problems that riders may encounter with this specific model of electric bike. Whether you’re a proud owner or considering getting one, understanding these issues and their solutions can enhance your riding experience.

Addmotor GRANDTAN CITY Overview

The Addmotor GRANDTAN CITY electric tricycle is designed for urban cycling, combining the benefits of an e-bike with the stability of three wheels. It boasts a low step-through frame and an adjustable backrest, making it accessible to riders of all abilities. Here’s a summary of its key features:

Motor	Bafang 48V*750W Front Brushless Hub Motor, 80 Nm Torque
Battery	Samsung 48V*20Ah (960Wh) with 3200 Cells Battery, Charging Time 10 Hours, Rated For 1,000-1,500 Charge Cycles
Display	Addmotor 5-Inch LCD Display
Controller	Addmotor 25A Controller
Throttle	Right Hand Half Twist Throttle with Switch
Lights	Front: Electric Headlight TRENDO by Spanninga Rear: Electric Taillight & Braking Light SOLO by Spanninga
USB Port	Integrated into Display, 5V, 1Amp
Wiring	Water-Resistant Connectors and Wiring Harness
Pedal Assist	Intelligent 7-Level Pedal Assist, Cadence Sensor
Charger	48V*2.0A 5 Pins, US Standard DC Charger, 5 Pins With Auto Magnetic Suction
Range	90+ Miles Per Charge with PAS 1 (Estimate)

Causes of Common Problems with the Addmotor GRANDTAN CITY

Before we dive into troubleshooting, let’s explore the potential issues that riders might face with the Addmotor GRANDTAN CITY electric bike and their respective solutions.

Common Problems with Addmotor GRANDTAN CITY

1. Battery Not Charging

Description of the Problem: The battery of your Addmotor GRANDTAN CITY does not seem to charge properly, resulting in reduced riding time.

Cause of the Problem: This issue can occur due to a faulty charger, poor electrical connection, or issues with the battery itself.

Troubleshooting:

1. Check the charger and make sure it’s properly plugged into the bike’s charging port and a working power outlet.
2. Inspect the charger’s LED indicator. If it’s not lit or showing a green light, it may be defective and needs replacement.
3. If the charger appears to be functioning correctly, try charging the battery for a longer period, as it may have been deeply discharged.
4. If the problem persists, contact Addmotor customer support for further assistance or battery replacement.

2. Loss of Pedal Assist Functionality

Description of the Problem: Your Addmotor GRANDTAN CITY’s pedal assist feature no longer provides the expected assistance while pedaling.

Cause of the Problem: This issue can be caused by a malfunctioning pedal assist sensor or a problem with the controller.

Troubleshooting:

1. Inspect the pedal assist sensor and ensure it’s properly aligned and free from obstructions. Clean it if necessary.
2. Check the wiring connections from the sensor to the controller for any loose or damaged wires. Reconnect or replace as needed.
3. If the problem persists, it may indicate a faulty controller. Contact Addmotor for professional diagnosis and potential replacement.

3. Display Screen Not Functioning

Description of the Problem: The Addmotor GRANDTAN CITY’s display screen remains blank or unresponsive when you power on the bike.

Cause of the Problem: Display screen issues can stem from loose connections, electrical problems, or screen damage.

Troubleshooting:

1. Ensure that the display is securely connected to the bike’s wiring harness and that all connections are tight.
2. Inspect the display screen for physical damage or cracks. If the screen is damaged, it may need replacement.
3. If the connections and screen appear to be in good condition, restart the bike’s electrical system by turning it off and on again.
4. If the display still doesn’t function, contact Addmotor’s technical support for further assistance or replacement options.

4. Unusual Noises from the Motor

Description of the Problem: You notice unusual noises, such as grinding or clicking, coming from the Addmotor GRANDTAN CITY’s motor during operation.

Cause of the Problem: Motor noises can result from loose components, debris in the motor, or motor wear and tear.

Troubleshooting:

1. Inspect the motor area for any loose bolts or components. Tighten them if necessary.
2. Check for debris or foreign objects that may have entered the motor housing. Remove any obstructions carefully.
3. If the noises persist, it could be a sign of motor damage. Contact Addmotor for professional assessment and potential motor replacement.

5. Inaccurate Battery Level Reading

Description of the Problem: The battery level displayed on the Addmotor GRANDTAN CITY’s screen does not accurately reflect the actual battery charge.

Cause of the Problem: This issue may arise from a faulty battery management system or sensor calibration problems.

Troubleshooting:

1. Try resetting the bike’s system by turning it off and on again. This may recalibrate the battery level readings.
2. If the problem persists, it’s recommended to consult Addmotor’s technical support for guidance on potential sensor calibration or battery management system issues.

6. Brake Performance Issues

Description of the Problem: You notice reduced braking effectiveness, such as longer stopping distances or squeaking sounds when applying the brakes.

Cause of the Problem: Brake issues can result from brake pad wear, misaligned calipers, or brake cable tension problems.

Troubleshooting:

1. Inspect the brake pads for wear and replace them if they are worn down.
2. Check the caliper alignment to ensure that the brake pads make proper contact with the wheel rims.
3. Adjust the brake cable tension to achieve optimal braking performance.
4. If issues persist, consult a bike mechanic for a thorough brake system inspection and potential replacement of components.

7. Erratic Motor Power Output

Description of the Problem: The motor on your Addmotor GRANDTAN CITY exhibits inconsistent power delivery, causing sudden surges or losses in speed.

Cause of the Problem: This issue may be caused by a malfunctioning throttle, controller, or electrical connection problems.

Troubleshooting:

1. Inspect the throttle for damage or loose connections. Replace or reattach as needed.
2. Check the controller for any visible damage or loose wires. Ensure all connections are secure.
3. Test the throttle’s responsiveness by gently twisting it. If it’s overly sensitive or unresponsive, consider replacing it.
4. If problems persist, contact Addmotor’s technical support for further diagnosis and potential component replacement.

8. Unresponsive Pedal Assist Levels

Description of the Problem: The pedal assist levels on your Addmotor GRANDTAN CITY do not change or respond when you adjust them.

Cause of the Problem: This issue can occur due to a faulty pedal assist sensor, wiring issues, or controller problems.

Troubleshooting:

1. Examine the pedal assist sensor for damage and ensure it’s properly connected to the controller.
2. Inspect the wiring harness for loose or damaged wires, and repair or replace them as necessary.
3. If the problem persists, it may indicate a controller malfunction. Contact Addmotor for professional assessment and potential replacement.

9. Tire Puncture or Blowout

Description of the Problem: You experience a flat tire or a sudden blowout while riding your Addmotor GRANDTAN CITY.

Cause of the Problem: Tire issues can result from sharp objects on the road, low tire pressure, or worn-out tires.

Troubleshooting:

1. If you have a flat tire, locate the puncture, and patch or replace the inner tube accordingly.
2. Regularly check and maintain the tire pressure within the recommended range to prevent flats and blowouts.
3. Inspect the tire treads for wear and replace the tires if they are worn down excessively.
4. Carry a portable tire repair kit and pump with you for on-the-go tire repairs during rides.

10. Electrical System Malfunctions

Description of the Problem: Various electrical components of your Addmotor GRANDTAN CITY, such as lights or the display, may not function as expected.

Cause of the Problem: Electrical system issues can arise from loose connections, damaged wiring, or component failures.

Troubleshooting:

1. Inspect all electrical connections and wiring for loose or damaged parts and secure or repair them as needed.
2. Restart the bike’s electrical system by turning it off and on to see if the issue resolves itself.
3. If specific components like lights are malfunctioning, check for blown fuses or replace the affected components individually.
4. If problems persist, reach out to Addmotor’s customer support for technical assistance and potential repairs.

11. Chain Slippage or Skipping

Description of the Problem: The bike’s chain occasionally slips off the gears or skips when pedaling, affecting your riding experience.

Cause of the Problem: Chain issues can result from improper tension, misaligned gears, or a worn-out chain.

Troubleshooting:

1. Check the chain tension by ensuring it’s properly seated on the chainring and rear cassette. Adjust the tension if needed.
2. Inspect the gear alignment to ensure that the chain runs smoothly across all gears. Adjust the derailleur if necessary.
3. If the chain is old or heavily worn, consider replacing it with a new one to prevent further issues.
4. Maintain regular chain lubrication to reduce friction and improve gear shifting.

12. Unresponsive Display Buttons

Description of the Problem: The buttons on the Addmotor GRANDTAN CITY’s display screen do not respond when pressed, hindering your ability to adjust settings.

Cause of the Problem: Button issues may arise from dirt or moisture ingress, worn-out buttons, or display screen malfunctions.

Troubleshooting:

1. Clean the display screen and buttons to remove any dirt or debris that may be affecting their responsiveness.
2. If the buttons are worn or damaged, consider replacing them with compatible replacements from Addmotor.
3. Check for any visible damage or defects on the display screen itself. If it’s damaged, it may require replacement.
4. Ensure that the bike’s electrical connections are secure, as loose connections can affect button functionality.

13. Uneven Motor Power Distribution

Description of the Problem: The motor power on your Addmotor GRANDTAN CITY seems uneven, with one wheel receiving more power than the other.

Cause of the Problem: Uneven power distribution can occur due to motor or controller imbalances, or issues with the wheel hub motors.

Troubleshooting:

1. Inspect the wheel hub motors for any visible damage or loose connections. Secure or replace as needed.
2. Check the controller settings to ensure that power distribution is balanced between the two wheels.
3. If the issue persists, it may indicate a motor or controller problem. Contact Addmotor for professional assessment and potential repairs.
4. Regularly rotate the tires to promote even wear and power distribution across both wheels.

14. Range Reduction in Cold Weather

Description of the Problem: During cold weather, you notice a significant reduction in the Addmotor GRANDTAN CITY’s range per charge.

Cause of the Problem: Cold temperatures can lead to decreased battery efficiency and, consequently, reduced range.

Troubleshooting:

1. Keep the battery and bike indoors or in a temperature-controlled environment when not in use to minimize exposure to extreme cold.
2. Consider using a battery cover or insulation to help maintain a stable battery temperature during rides in cold weather.
3. Charge the battery at room temperature to optimize charging efficiency.
4. Be aware that reduced range in cold weather is normal, and plan your rides accordingly.

15. Loose or Unstable Handlebars

Description of the Problem: The handlebars of your Addmotor GRANDTAN CITY feel loose or unstable while riding, affecting steering control.

Cause of the Problem: Handlebar issues can result from loose stem bolts, damaged handlebar grips, or misalignment.

Troubleshooting:

1. Check the stem bolts and tighten them to the manufacturer’s recommended torque specification to secure the handlebars.
2. Inspect the handlebar grips for wear and replace them if necessary to improve grip and stability.
3. Ensure that the handlebars are aligned with the front wheel to maintain proper steering control.
4. Regularly check for any signs of wear or damage in the handlebar components to prevent safety issues.

16. Sudden Loss of Power

Description of the Problem: While riding, the Addmotor GRANDTAN CITY experiences a sudden loss of power, leaving you without motor assistance.

Cause of the Problem: This issue can arise from a depleted battery, loose wiring connections, or a malfunctioning motor.

Troubleshooting:

1. Check the battery level on the display to ensure it’s not depleted. Recharge the battery if needed.
2. Inspect all wiring connections, including the battery, motor, and controller, for any loose or disconnected wires. Reconnect as necessary.
3. If the battery and connections are fine, the motor may be the issue. Contact Addmotor for professional assessment and potential motor replacement.

17. Uneven Braking Force

Description of the Problem: When applying the brakes, you notice that one wheel receives more braking force than the other, causing instability.

Cause of the Problem: Uneven braking can result from misaligned brake calipers, uneven brake pad wear, or brake cable tension issues.

Troubleshooting:

1. Check the alignment of the brake calipers to ensure they are centered on the wheel rims. Adjust as needed for even braking.
2. Inspect the brake pads for uneven wear and replace them if necessary to maintain consistent braking performance.
3. Adjust the brake cable tension on both sides to ensure that both wheels receive equal braking force.
4. Regularly maintain and lubricate the brake components to prevent further issues.

18. Loose Pedals

Description of the Problem: The pedals on your Addmotor GRANDTAN CITY feel loose or wobble during pedaling, causing discomfort and reduced efficiency.

Cause of the Problem: Loose pedals can result from worn pedal bearings, damaged pedal threads, or improper installation.

Troubleshooting:

1. Inspect the pedal threads and ensure they are undamaged. If damaged, replace the pedals.
2. Check the pedal bearings for wear and replace them if needed to eliminate pedal wobbling.
3. If the pedals were not installed correctly, remove and reinstall them, ensuring they are securely attached.
4. Periodically grease the pedal threads to reduce friction and maintain pedal stability.

19. Inconsistent Charging

Description of the Problem: The Addmotor GRANDTAN CITY’s battery charging process becomes inconsistent, with the charger frequently disconnecting or failing to charge.

Cause of the Problem: Charging issues can result from a faulty charger, damaged charging port, or loose connections.

Troubleshooting:

1. Inspect the charger and charging port for damage or debris that may hinder the connection. Clean and ensure a secure connection.
2. Check the charger’s LED indicator to see if it remains steady during charging. If it blinks or turns off, the charger may be defective and needs replacement.
3. Try using a different power outlet to rule out electrical issues in the outlet itself.
4. If problems persist, contact Addmotor for assistance and potential charger replacement.

20. Difficulty Shifting Gears

Description of the Problem: Shifting gears on the Addmotor GRANDTAN CITY becomes challenging or unresponsive, impacting your ride’s versatility.

Cause of the Problem: Gear-shifting issues can occur due to misadjusted derailleurs, cable tension problems, or worn-out shifters.

Troubleshooting:

1. Inspect the gear shifters and ensure they are functioning correctly. Replace them if they are damaged or worn out.
2. Check the cable tension for the derailleurs and adjust it as necessary to ensure smooth and precise gear changes.
3. Examine the derailleurs for proper alignment and make adjustments to align them with the gear cogs.
4. Keep the drivetrain well-lubricated to enhance gear shifting performance.

21. Loose or Noisy Fenders

Description of the Problem: The fenders on your Addmotor GRANDTAN CITY may become loose or produce rattling noises while riding.

Cause of the Problem: Loose fenders can result from bolts becoming undone, worn fender mounts, or improper installation.

Troubleshooting:

1. Inspect the fender bolts and tighten them securely. Use thread locker if needed to prevent them from coming loose.
2. Examine the fender mounts for wear or damage. Replace them if necessary for a secure fit.
3. If you suspect improper installation, follow the bike’s user manual or consult a professional to reinstall the fenders correctly.
4. Apply rubber or foam padding between the fender and frame to reduce noise if rattling persists.

22. Difficulty in Folding/Unfolding

Description of the Problem: You encounter challenges when trying to fold or unfold the Addmotor GRANDTAN CITY, affecting its portability.

Cause of the Problem: Folding issues may arise from misaligned folding mechanisms, debris hindering the process, or lack of lubrication.

Troubleshooting:

1. Inspect the folding mechanisms to ensure they are properly aligned and free from debris. Clean and lubricate them if needed.
2. Follow the bike’s user manual for folding and unfolding instructions precisely to avoid common mistakes.
3. If you encounter resistance, gently apply pressure while folding or unfolding, being cautious not to force any components.
4. Maintain regular lubrication of pivot points to ensure smooth folding and unfolding in the future.

23. Motor Overheating

Description of the Problem: The motor on your Addmotor GRANDTAN CITY becomes excessively hot during rides, which can lead to reduced performance.

Cause of the Problem: Motor overheating can result from pushing the bike beyond its limits, extended steep climbs, or insufficient cooling.

Troubleshooting:

1. Avoid prolonged steep climbs or pushing the motor beyond its power capabilities to prevent overheating.
2. During hot weather, take breaks to allow the motor to cool down. Avoid continuous high-speed riding in such conditions.
3. Ensure that the motor has adequate airflow by keeping it unobstructed by bags or other objects.
4. If overheating persists, contact Addmotor’s technical support for further guidance and potential motor inspection.

24. Loose or Uncomfortable Seat

Description of the Problem: The saddle on the Addmotor GRANDTAN CITY may become loose, uncomfortable, or require adjustments for a better fit.

Cause of the Problem: Seat issues can result from loose seatpost bolts, improper saddle height, or uncomfortable design.

Troubleshooting:

1. Check the seatpost bolts and tighten them securely to prevent the saddle from shifting or becoming loose during rides.
2. Adjust the saddle height to match your comfort and riding position. Follow the bike’s user manual for proper adjustment guidelines.
3. If you find the saddle uncomfortable, consider replacing it with a more ergonomic or padded saddle that suits your preferences.
4. Apply lubricant to the seatpost to reduce friction and allow for smoother seat adjustments.

25. Inaccurate Speed Readings

Description of the Problem: The speed displayed on the Addmotor GRANDTAN CITY’s screen may not accurately reflect your actual riding speed.

Cause of the Problem: Inaccurate speed readings can result from sensor issues, magnet misalignment, or interference.

Troubleshooting:

1. Check the speed sensor and magnet alignment on the wheel. Ensure that they are properly positioned and not obstructed by debris.
2. Clean the sensor and magnets to remove dirt or debris that may affect their accuracy.
3. If interference is suspected, try riding in different locations to see if the speed readings improve in less congested areas.
4. If problems persist, consult Addmotor’s technical support for further sensor inspection and potential replacement.

Addmotor GRANDTAN CITY Electric Bike User Reviews

Positive Reviews from Addmotor GRANDTAN CITY Electric Bike Users

Some users were satisfied with the following parameters associated with their Addmotor GRANDTAN CITY Electric Bike:

• Powerful Motor and Smooth Riding Experience: Many riders praised the bike’s powerful motor, which provided smooth and enjoyable rides even on hilly terrain.
• Comfortable Seating: Users found the bike’s comfortable and adjustable seating, including the backrest, to be suitable for riders of all abilities.
• Long Range on a Single Charge: Several users appreciated the bike’s impressive range of up to 90+ miles per charge, allowing for extended rides without frequent recharging.
• Fat Tires for Stability: The wide fat tires were noted for their stability, making it easier to navigate city streets and uneven terrain without skidding or rolling over.
• Convenient Features: Riders liked the integrated features, including the LCD display, pedal assist, and USB port for added convenience during their rides.

The majority of users expressed satisfaction with their Addmotor GRANDTAN CITY Electric Bike, highlighting its performance, comfort, range, stability, and convenient features.

Negative User Reviews of the Addmotor GRANDTAN CITY Electric Bike

Some users were not satisfied with the following problems associated with their Addmotor GRANDTAN CITY Electric Bike:

• Motor Overheating: A few users reported issues with motor overheating during rides, which affected the bike’s performance.
• Charging Inconsistencies: Some users experienced problems with the charging process, including the charger disconnecting or failing to charge consistently.
• Unresponsive Pedal Assist: Several riders mentioned issues with unresponsive pedal assist levels, which hindered their riding experience.
• Electrical System Malfunctions: A handful of users encountered malfunctions in various electrical components, such as lights and displays.
• Brake Performance: A few users noticed reduced brake performance, including longer stopping distances and squeaking sounds when applying the brakes.

While there were some negative experiences reported, it’s important to note that these issues appeared to be less common compared to the positive feedback.

Addmotor GRANDTAN CITY Electric Bike Manual

The operating instructions and user manual for the Addmotor GRANDTAN CITY Electric Bike can be found on the manufacturer’s website. For detailed guidance on assembly, usage, maintenance, and troubleshooting, please visit the official Addmotor website and locate the manual in the support or resources section.

Addmotor GRANDTAN CITY Frequently Asked Questions

1. How do I assemble my Addmotor GRANDTAN CITY Electric Bike?

To assemble your Addmotor GRANDTAN CITY Electric Bike, please refer to the comprehensive assembly instructions provided in the user manual. Ensure that you follow the step-by-step guide carefully to ensure proper assembly and functionality.

2. What should I do if my bike experiences a sudden loss of power during a ride?

If you encounter a sudden loss of power while riding, first check the battery level on the display. If the battery is not depleted, inspect all wiring connections for loose or disconnected wires. If the issue persists, it may indicate a motor or controller problem, and you should contact Addmotor’s customer service or a service center for assistance.

3. How can I maximize the range of my Addmotor GRANDTAN CITY Electric Bike?

To maximize the range of your bike, ensure that you maintain proper tire pressure, use pedal assist efficiently, avoid excessive uphill riding, and keep the battery well-charged. Additionally, riding at lower speeds can extend your bike’s range per charge.

4. What should I do if my bike’s display buttons are unresponsive?

If the buttons on the display screen are unresponsive, clean the display and buttons to remove dirt or debris. Check for any worn or damaged buttons. If the issue persists, inspect the display’s electrical connections, and contact Addmotor’s customer service or a service center for further assistance.

5. How often should I lubricate the chain on my Addmotor GRANDTAN CITY Electric Bike?

It’s recommended to lubricate the bike’s chain regularly to reduce friction and ensure smooth gear shifting. Depending on your riding frequency and conditions, lubricating the chain every 100-200 miles or when it appears dry or noisy is a good practice.

Conclusion

In case of any issues or problems with your Addmotor GRANDTAN CITY Electric Bike, it is advisable to always refer to the user manual, contact Addmotor’s customer service, or visit a certified service center whenever possible. Proper guidance and professional assistance can help address and resolve any concerns effectively.

Addmotor CITYTRI E-310 Mini Common Problems
Addmotor M-66 R7 Common Problems
Addmotor CITYPRO E-53 Common Problems