Troubleshoot

Ultra Ebike assist system is an intelligent assist system that provides the appropriate power assist level based on the speed, acceleration, the slope, and the user preference assist level set in the App. It will provide power automatically when you are pedaling or on an incline.

The motor will not assist until the speed reaches 5km/h. It will deliver power when it senses acceleration and decrease the power when braking. It will deliver appropriate assistance based on when the user most requires it.

The 5 assist modes are as follows:

*Manual mode:
The most often used mode. The user can set their preferred assist grade from 0 to 99%. 0 stands for no assist while 99 stands for the strongest assist. After setting the assist grade, the wheel will assist automatically.

*Climbing mode:
The wheel provides a user-set assist grade only if the road is uphill and above a certain user-set slope angle. The assist grade and the slope angle can be set in the App. For example, when you set 2 degrees and 80 assist grade, the wheel will give you 80% assist ance when you are on a road with slope angle above 2 degrees.

*Commute mode: In this mode, the wheel will provide fairly strong assist power all the time. The output curve of the assist grade is as shown on the on-screen graph. It is similar to an assist grade of 60% in the manual mode.

* Leisure mode:
The assist power output is as the illustrated curve shown on main screen. The assist power output will increase and decrease in 10 min cycles to allow for a leisurely cycle with moderate exercise.

*Exercise mode:
This mode has a low assist output to allow for a good exercise routine with occasional assistance to help you go that ‘extra mile’.

You can put your phone away if you prefer, the assistance will be based on last App user settings.

You can also view the assist mode breakdown and app diagram here.

Note: We will occasionally optimize the system algorithms and publish the new firmware. Ultra smart assist system will occasionally be upgraded via the App.

Ultra Ebike smart assist system is a unique assist system developed by Ultra and tech partners. The user sets the desired assist level and the kit will provide the corresponding power automatically according to varying road parameters and various user preferences. For example: Setting the assist level to 40%, which means that to maintain a certain speed, the motor will provide 40% of the power, and the rider needs to provide 60% of the power. When the rider decreases the pedaling power, the system will ask the motor to slow down and the power delivery will be reduced accordingly; when the rider increases the pedaling power, the system can immediately sense it, increase the assist power and increase the speed. So if you want to ride easy, you can set the assist level to 90%, then you just need to pedal lightly 10% of the power; if you have enough physical strength, we can adjust the assist level to 30%, so that the motor provides less part of the power and the bike is 70% driven by human power.
The system will automatically regulate power when braking. The kit can sense braking through various parameters such as deceleration, angular velocity, current, voltage, and riding speed. It can sense braking and shut down the motor within 10ms (0.01 second). The system will not shut down the motor completely when you squeeze the brake slightly. It can sense the slight change of speed, but it will not shut down the motor because it thinks that you just want to slow down. If you squeeze the brake with more intent and want to stop, the system will sense this and cut the power completely.
Ultra wheel has a built-in six-axis gyroscope, which can sense the slope angle of the terrain. In order for it to detect the slope accurately, you must calibrate the gyroscope angle on level ground first. How the gyroscope works: The purpose of calibrating the gyroscope angle is to provide the gyroscope with a horizontal reference, so it can detect a slope. If the gyroscope is calibrated on an incline, the gyroscope will regard the incline as a horizontal, so the motor will provide incorrect assistance; Therefore, you must calibrate the gyroscope on level horizontal ground to insure correct and accurate power delivery.

You can buy a bottle conversion bracket online from the Ultra shop.

It is normal practice to loosen or remove the brake attachment bolts and caliper before fitting a new wheel. Disc brakes normally conform to international standard spacings so it is best to use the spacers provided in the Ultra kit in the configuration outlined in the instructions. This will insure everything will be in, or close-to-correct alignment.

You can adjust the clearance between the hub, the disc rotor and the fork, if your setup requires it, by adding or removing the gasket under the brake disc rotor and/or spacer washers on either side of the hub axle. For example, if the brake caliper makes contact with the hub or the spokes, then add the axle spacer washers on caliper side to gain the clearance to avoid contact.

Always ensure that the anti-rotation washers are inside the fork legs with the tab oriented to engage with the forks dropouts.

Add washers to gain more space the other side if required. Experiment with spacers until wheel spins freely and is center aligned with brake calipers. It may help if you loosen the brake calipers to allow for movement, then re-tighten when finished.

First ensure you are using the correct size disc rotor for your setup. The ultra kit comes with a 160mm rotor but feel free to use your existing rotor if you prefer to or require it.

The most common ‘manitou post mount’ system uses two brake caliper mounting bolts on the caliper to attach it to the fork or bracket. Loosen the two bolts and move the caliper right or left to adjust and obtain friction-free clearance. Then tighten the bolts tightly to fix the caliper in place.

This can be quite an advanced procedure if you are not familiar with wheel removal and brake alignment, if you are not sure, you should seek the assistance of a professional bicycle mechanic.

PAS device is not found by Bluetooth. No lights on PAS:

– Remove the insulation film from inside the battery compartment.
– Move the device to wake it then search again.
– Remove and re-locate the PAS battery to reset the device, then re-connect.
– When installing the battery, ensure that the battery contact plate is not over compressed to cause loss of
battery contact. Carefully lift the gold contact tab to improve battery contact.
– Battery is completely depleted of charge. Replace with a new battery. Battery model No: CR2032-3V.

PAS device does not pair with Bluetooth after a period of non-use:

-In order to save battery power the sensor will enter ‘sleep’ mode after 1 minute. Move the sensor, the device will automatically wake up and allow pairing.

The PAS device looses connection with the APP or is not functioning:

– The PAS device will only function when paired with the App.
– Search for and connect App to the PAS device.
– Tap Cadence ikon centre of main App screen to activate the PAS.
– Check all of 1. above.

The PAS device is only compatible when paired with the Ultra App. The app must first be paired with the bike and the PAS device paired with the App for the PAS device to function.
  1. Download the app from the App store, search for ‘Ultra Ebike’.
  2. Open the App and allow all the permissions the App asks for.
  3. Now tap the magnify glass icon on the top right of the App main screen to search for the wheel.
  4. Select the right address of your kit in the list to connect.

 

IMPORTANT: You must connect the kit in the App, do not connect it in the operating system of the phone. You won’t need to input any pin numbers to connect to the Ultra App.

Please make sure your phone’s location and connectivity permissions are allowed and Bluetooth and Location Services are switched on in your phone OS.

Check that the kit is not connected with other devices (optional Bluetooth throttle). The kit can connect to only one device at the same time.

  1. Do not connect the bike via the operation system of the phone, connect via the Ultra App.
  2. Check that the Bluetooth ikon on the App main screen is illuminated. If not, tap to connect.
  3. Try rebooting everything, quit and relaunch app, switch Ultra battery Off then On again.
  4. Search, re-find and re-connect to the bike.
  5. Make sure the battery is charged.
  6. Make sure the kit is not connected to any other Bluetooth devices (phone or Bluetooth throttle display). Disconnect it if there are other connected devices.
  7. Make sure the Bluetooth of the phone is switched on and the GPS or location service is switched on in the phone system.
  8. Make sure that you have allowed all the permissions the App asks when you first open the App. This is to allow the phone’s Bluetooth device to talk to the kit. If you have not allowed the permissions, please uninstall and reinstall the App, when the App asks the permissions again, please allow them.
  9. Please try another mobile phone if the phone is too old to connect.
Ultra Ebike assist system is unique to any other system. The slope of the terrain is a critical factor of how the system calculates the appropriate power delivery. The Gyroscope can measure the slope, but it needs to know what 0-degree ground is. You need to calibrate the Gyro angle to be 0 on a level ground as per the instructions in ‘Gyro Angle Calibration’ in the App. This will enable the gyroscope to tell how many degrees incline you are on and ask the system to provide the appropriate assist power. If you do not calibrate the Gyroscope, you may get incorrect or no assistance from the motor.
  1. Make sure your phone bluetooth and location services are
    switched on in your phone operating system settings.
  2. Launch the Ultra app and ALLOW PERMISSIONS on first launch.
  3. Connect the phone to the wheel from within the Ultra App (do not
    connect the bike via the operation system of the phone). Tap ‘bike
    search’ function top right of Ultra App main screen to scan
    for the wheel. Select the wheel from the list when found. Your Ultra
    wheel is now connected to your phone (your phone will
    automatically reconnect with the wheel from now on).
  4. Select ‘Settings’ top left of the main screen.
  5. Press ‘Firmware Update’ to update your bike’s firmware.
  6. IMPORTANT: YOU MUST CALIBRATE GYRO ANGLE BEFORE YOU FIRST
    RIDE. Select ‘Gyro Angle Calibration’; Place the bike on level ground
    in a vertical position and tap ‘Gyro Angle Calibration’ to set.
  7. Select ‘Cadence’, move the pedal to activate the PAS, then scan for
    and select the found device to connect (your phone will
    automatically reconnect from now on).
  8. Select ‘Tyre Size’ and enter the correct tyre size.
  9. Select ‘Bike Weight’ and set the correct bike weight.
  10. Select ‘Rider Weight’ and set the correct rider weight.
  11. Select ‘Speed Limit’ to set your desired maximum assist speed
    (up to 25km/h).

Please follow the steps as below to solve the problem:

  1. Check that the wheel and components are correctly installed.
    Please install Ultra components according to the user manual. Latest manuals available here.

 

– Battery must be mounted in a forward facing direction.
– Wheel must be mounted in the correct rotational direction.
– Make sure the cable plug from battery to wheel is firmly seated.

2. First try rebooting everything, quit and relaunch app, switch Ultra battery Off then On again.

3. Tap “Restore Factory” in the setting page of the App;

4. Recalibrate the gyroscope angle in the App or optional Bluetooth Throttle Controller.

5. Make sure your battery is charged.

Please check the points below:

  1. Please check that the wheel is installed correctly and there’s no contact between wheel and frame/brakes.
  2. Check that the gyroscope is calibrated correctly. Tap ‘Gyro Angle Calibration’ on ’Settings’ menu and follow on-screen instructions.
  3. If in ‘Manual’ mode, check that the assist grade is not set at ‘0’ or too low.
  4. Check that you have not set a very low value for ‘Speed Limit’ in the Settings.
  5. If in ‘Climbing’ mode, check that the assist slope angle is not set as too high a slope value and that the assist grade is not set too low.
  6. Try re-booting everything, quit and relaunch the app, switch Ultra battery Off then On again.
  7. Re-search and reconnect to the bike wheel.
  8. Check that the Bluetooth icon on the App main screen is illuminated. If not, tap to connect.
  9. Reset factory and ‘Wheel Restart’ in App ‘Settings’ page.
  10. Check that the battery is charged.
  11. Check that the kit is not locked in the App main screen.
  12. Make sure the cable plug from battery to wheel is firmly seated.

The  ‘Bike Lock’ function is activated.

Go to App main screen and tap the ‘Lock’ ikon centre right of main screen.

When the battery level is lower than 20- 30%, the assist power would be weak or unstable to avoid battery over discharge. So it is normal if the motor does not assist when the battery level is 10 – 20%. Top-up your charge whenever possible. Battery is happier with charge than without.

No, you don’t have to connect the kit with the App when you are riding. The assist system is written in the controller, not in the App. But before the first time you use the kit, you must calibrate the gyro angle for the bike. You can set the assist grade in the App and put your phone in your pocket. The kit will provide Appropriate assist power automatically.

NOTE: The PAS device is only functional when paired with the App.

The gyroscope is not calibrated correctly. Stand the bike upright on level horizontal ground, and then calibrate the gyroscope through the App or Bluetooth display (optional). This is so that the gyroscope can sense the correct slope gradients and provide appropriate assist power.
The climbing mode means that it only assists on uphill roads, and therefore will not assist on level roads or downhill roads. Riders can use this feature to save battery power or just make it easier to climb. Under climbing mode, the kit provides a certain assist grade only if the road is uphill with a slope angle that is above a certain set value. The assist grade and the slope angle can be set in the App. For example, when you set 2 degrees and 80 assist grade, the wheel can give you 80 assist grade when you are on the road with slope angle above 2 degrees.
  1. Check that the the ‘Lock’ function on the main screen is not highlighted ‘On’.
  2. Check that the overspeed alarm in the app is not set too low.

There are several reasons why the assistance is weak or sometimes no assistance:

  1. Check that the wheel is installed correctly, please refer to the instruction manuals and install it correctly according to the instructions. If the installation is not correct, the assistance may be unstable.
  2. Adjust the assist mode. If the assist level is set to low, the assist may be absent from time to time. Please increase the assist level.
  3. The angle of the gyroscope is incorrect, please place the bike on level ground and re-calibrate the gyroscope.
  4. If you are in climbing mode, set a lower value for the slope. The motor will only engage when it reaches the set slope value.
  5. If you are using the PAS device, this will only assist when you are pedaling.
  6. If you are traveling below 4 mph, there will be no power delivery.
  7. If you have been using uphill assistance for sustained periods of time, the motor may cut-out to protect the battery and overheating the motor. There is nothing wrong with the kit if this happens. Either reduce the assist grade or top-up the battery charge.
  8. If your battery is running low on charge, the system will shut down when under load to prevent over discharge.
  1. An inconsistent power assist may be caused by incorrect gyro calibration. Go to ‘Gyro Calibration’ in App ‘Settings’ menu and re-calibrate the angle of the gyroscope.
  2. Try rebooting everything, quit and relaunch the app, switch Ultra battery Off then On again.
  3. Check if the Ultra battery power is too low (below 30%). Low battery charge will cause occasional failure when assisting to prevent from over discharge; if so, recharge the battery.
  4. The Ultra battery is not seated correctly. Place the battery firmly in its cradle and lock into place with keys. On rare occasions if the bike has been on rough terrain, the kettle plug pins on the battery cradle may be losing contact with the battery terminal. Clean the battery terminals and plug with a cotton bud and alcohol to improve battery contact.
  5. Check that the battery/wheel cable plug is firmly seated.
  6. If you have been using uphill assistance for sustained periods of time, the motor may cut-out to protect the battery and the motor overheating. There is nothing wrong with the kit if this happens. Reduce the assist grade. Top-up battery charge. Switch the assist off and ride normally for a while.
  7. If your battery is running low on charge, the system will shut down when under load to prevent over discharge.
  1. If you have been using uphill assistance for sustained periods of time, the motor may cut-out to protect the battery and the motor overheating. There is nothing wrong with the kit if this happens.
    – Reduce the assist grade.
    – Top-up battery charge.
    – Switch the assist off and ride normally for a while.
  2. Please check that the battery is charged.
  3. Check that the assist grade is not set at 0.
  4. Check that the assist mode is not in climbing mode with a high slope value.
  5. Please check that the gyroscope is calibrated correctly.
Please check;
  1. Check for friction between the motor hub and the front fork. Please adjust the clearance by adding or removing washers between hub and the front fork.
  2. General bike maintenance: Check if there is pad friction on the disc brake. Adjust the position of the disc brake caliper to avoid the friction.
  3. General bike maintenance: Check if the spoke caps are damaged or if any spokes are loose. If the spoke caps loosen, you will need to remove the tube and tire to replace or tighten the spoke caps.
  4. Check if the brake disc attaching screws are too long and touch against the hub inside. You can remove the disc and the screws to try if there is still contact or not. If the disc brake screws are too long, please replace them with shorter disc brake screws.
Yes. You can either switch the kit off or even remove the battery or set the kit to 0 assistance and ride the bike as you normally would.

Yes! You can ride in the rain.

Ultra Ebike wheel’s motor has SKF waterproof bearings, the controller is treated with waterproof coatings, and the battery is enclosed in a heat sealed casing and treated with waterproof coating. Therefore, the waterproof grade is P65. You don’t need to worry about water ingress when riding in the rain, but we recommend that you don’t store the bike in damp environments for sustained periods of time and wipe the kit dry when you’ve completed your ride to avoid the vapor penetrating into the motor.

  1. The version of the App is dated, please update to the latest version of App.
  2. Your phone is dated.

When you tap the lock icon in the App, the motor will be disabled. The power assist will not work, you can still ride the bike but when the bike moves, it will sound an annoying loud alarm.

Please tap “Restore Factory” in the setting page of the App.

Tap the “Firmware Upgrade” in the setting page of the App to update the firmware.

This is mainly caused by an unstable connection between the kit and App:

  1. Make sure the bike is near your phone, if it is distanced, the Bluetooth connection may be interrupted.
  2. Quit and relaunch the App and connect the kit again.
  3. Switch the main battery ‘off’ then ‘on’ to reset the system.

Fault 01: Over-current or sudden breakdown of MOS.

Reason: Driving circuit fault or over current leads to MOS short.

Solution:

  1. Disconnect and reconnect the motor cable, and restart the kit in the App.
  2. If the Fault 01 is still there after restarting, and the motor is stuck when cranked in reverse, this means the MOS has failed. The controller may need replacing.

Fault 02: The motor is stuck.

Reason: Fault 02 usually occurs when the wheel is stopped by force or other components and objects, such as sudden braking.

Solution: Clear the object that stops the motor from rotating and restart the kit in the App.

Fault 08: Hall Fault.

Reason: The connection between the controller and the motor has poor contact.

Solution: Reconnect the cable between the motor and the controller. Usually, Fault 08 is temporary.

Fault 10: Gyroscope fault.

Reason: Water or moisture has entered the controller causing problems with the gyroscope. This happens very rarely.

Solution: Dry the controller and leave it at room temperature for a few days.

Fault 20: 24C02 electronic device failure.

Reason: Water or moisture has entered the controller. This happens rarely.

Solution: Dry the controller and leave it at room temperature for a few days.

Fault 40: Hall is abnormal.

Reason:

  1. The motor wire is not connected well or the motor wire is broken;
  2. The motor’s Hall is burnt out due to water ingress or motor burnout;
  3. The internal magnet of the motor rubs the circuit.

Solution:

  1. Check if the cables between the motor and controller are connected well, and check that the cable connect is plugged in deeply enough to reach the mark line. If not please disconnect and reconnect the connectors to the mark line and then restart the kit in the App settings.
  2. Check if the motor wire is broken. If the wire on the motor side is broken, the motor needs to be replaced.

*Note: Fault codes can be combined. For example: Fault 48 stands for both Fault 08 and Fault 40; Fault 0A stands for both Fault 02 and Fault 08.

  1. Please tap “Restore Factory” in the App setting page and try again.
  2. Reboot the Ultra Battery and the App.
  3. Re-search and reconnect Bluetooth to the bike.

Mileage: Perimeter of the wheel and revolutions count = mileage

Riding time: Time accumulation when the speed is more than 0.

Calories consumed by riding: Calculate based on bike and rider weight, load, assist settings and a number of other parameters.

Average speed: The total mileage divided by the ride time.

You can modify it by the two methods;

  1. Tap the name of the wheel on the main view of the App to edit the name.
  2. Find the name on the setting page and tap on it to modify.
You can judge the if the capacity of the battery is normal or not by the charging time of the battery. Drain the battery and check the charging time: The charging time of the Ultra Ebike battery is about 3 hours. If the charging time is far from above, then there is something wrong with the battery.
The ideal working environment temperature of a lithium battery is 25℃, under this temperature the lithium battery has the highest efficiency. The normal charging working temperature is 0℃-60℃, and the normal discharging working temperature is -20℃-60℃. However, the performance of the lithium battery will decrease when the temperature is lower than 0℃, and the discharge capacity will be reduced accordingly. The working temperature of Ultra wheel’s lithium battery is controlled between 0°C and 40°C. The BMS will stop power supply after the battery temperature exceeds 70°C to ensure the safety of the battery.

Ultra Ebike kits use EV18650 lithium-ion battery cells of class A quality. Working with our own BMS system, the lifetime of the battery is high. 75% ~80% charge capacity is retained after 1,000 cycles. So with normal use, it can last up to 5 years.

Note: The definition of one cycle is to charge the battery from 0 to 100% and discharge it fully. For example, if you charge the battery from 0 to 50% and discharge it to 0, that is 0.5 cycle.

Lithium-ion batteries are different from traditional lead-acid batteries. Lithium-ion batteries have no memory effect. You don’t have to wait until the battery is drained before charging. The indicator light of the charger will turn green when the battery is fully charged. If you don’t ride the bike for a long time, we recommend that you charge the battery at least once in every 3 months to avoid the battery having a low voltage, low voltage will have a negative influence on the battery’s performance.
The wireless display with throttle integrates the display and a thumb throttle together. It displays the speed and allows you to set the parameters of the kit, and can be used as a throttle to control the power delivery. The display connects to the kit via Bluetooth. There is no cable between the display and the kit. The display can replace the smartphone App for the fundamental functions; search and connect the kit, calibrate the gyroscope, set the assist grade, and display live cycling data. The kit can not connect to the display and the mobile App at the same time. For example when the phone is connected, you need to quit the App or switch off the Bluetooth of the phone before you connect it to the display. NOTE: The PAS device is not compatible with the throttle device, so this device should be used on private land only.
  1. Quit the App, turn off or disconnect the Bluetooth connection on your phone before you switch the Bluetooth display on. The wheel cannot connect to more than one device at the same time.
  2. Press the power button of the Bluetooth display to turn it on. Then press the power button three times repeatedly. The display will search for the Bluetooth address of the Ultra Ebike kits nearby.
  3. After the display finishes the search, press the up and down keys to select the right address of your kit and press the power button to connect.
Ultra Ebike Wheel cannot be connected to both the mobile phone App and the Bluetooth display at the same time, it can only connect to a single device at the same time. When you connect the Bluetooth display, you can no longer connect to the mobile phone. One of the devices must be disconnected before the other device is connected.

Battery capacity: 1200mAh

Standby time: more than 12 months

Working time: 100 hours

Charging time: 3 hours

When the circle icon on the right top of the screen flashes, it indicates that the display is running out of power and the screen will go dim. When the display is charging, the light in the background glows red, and the light will turn green if the display is fully charged.

Note: The display cannot be used during charging.

There are 2 ways to clear the current mileage in the App (The mileage cannot be cleared directly by the display);

  1. Tap and hold the value of speed or current mileage on the main page of the App to clear.
  2. Tap “Current record” in the setting page of the App and then tap “clear” on top right to clear.

This problem may be caused by the unstable connection between the Bluetooth display and the kit. Please connect the kit with the App to see if the mileage can be displayed.

  1. If the App does not have mileage displayed, try “Restore Factory” in the setting page.
  2. If the App displays the mileage, it means there is a problem with the Bluetooth connection of the Bluetooth display. Try to switch off the Bluetooth display and switch on it again and reconnect it with the kit.