FX300 Treadmill FAQ
FX300 Treadmill Product Photo

FX300 Assembly Video
Troubleshooting & Quick Fixes
Display shows the message O1L or OIL - FX300 treadmill
This message appears when the treadmill needs lubrication. After lubricating it, please press and hold the Stop/Pause button for approx. 5 seconds. This resets the timer and clears the message. Repeat this process whenever the message appears on the display.
The treadmill is wearing out. What type of footwear is suitable for the treadmill?
It is important to note that treadmills are best used with trainers that have smooth, flat soles. Trail running shoes or shoes with studs or rough soles can cause excessive wear, which may damage the equipment.
Error SAFE – Safety Key
⚠️ Error SAFE – Safety Key
Description:
The safety key is not in place, or the magnet is too weak. Your treadmill will not start unless the key is correctly in place.
Solution:
Check that the safety key is correctly inserted in its designated slot.
Check the magnet strength – if the magnet is weak, you can try using a different magnet.
If this does not help, you will need a replacement safety key.
👉 You can easily replace it at home – without affecting your warranty and much more conveniently than returning the product. If this does not resolve the issue, we will be happy to collect your device under warranty. Don’t worry: if anything does not go as planned during the replacement and the device is damaged as a result, we will of course take responsibility – provided you have handled the device carefully and respectfully.
Applicable to: all models with a safety key
Error 04
The error code "Error 04" or "E04" usually indicates that the device is not receiving enough power – this is most often because too many electrical devices are plugged into the same socket at the same time.
We therefore recommend plugging the device directly into a dedicated wall socket (without a power strip) and testing it again.
Error message E03 - FX300 treadmill
E03: Speed signal not received for more than 3 seconds.
Solution: Check that all plug connections are securely fitted. If a plug connection is defective, it must be replaced.
Running belt shifts while running - FX300 treadmill
Follow these instructions to tension your treadmill correctly:
1. Choose the right tool – Depending on your model, you will need either a Phillips screwdriver or an Allen key. One of these tools is usually included with the treadmill.
2. Adjust the tension – If the treadmill belt slips, increase the tension by turning the left and right adjustment screws a quarter turn clockwise. If the belt is sticking, reduce the tension by turning both screws a quarter turn counterclockwise.
3. Check the adjustment – Set the speed to 1–2 km/h and walk on the treadmill. If the belt slips (the motor spins without moving the belt), increase the tension. If the belt and motor are sticking, reduce the tension. Also make sure the belt is centred. If it is not, centre it properly.
4. If the running belt is not centred, increase the tension on the side towards which it is moving. (If it moves to the right = slightly tighten the right side or slightly loosen the left; if it moves to the left = slightly tighten the left side or slightly loosen the right.) Tighten by no more than a quarter turn at a time, then check again that the belt is centred.
Maintenance & Cleaning
Regular maintenance and care help preserve the lifespan and performance of your device. Keep the device clean by dusting the components regularly. Clean both sides of the device to prevent dust from accumulating underneath the belt. Keep your running shoes clean to prevent dirt from getting onto the running surface and belt. Clean the surface of the running belt with a clean, damp cloth. We recommend switching off the device for 10 minutes after 2 hours of continuous use, and switching it off completely when not in use. A loose running belt can cause the runner to slip while running. If the running belt is too tight, the motor’s performance will decrease and friction between the roller and the running belt will increase. The ideal position is when the belt can be pulled 50–75 mm away from the running surface. You must lubricate your device before using it for the first time.
How can I replace the tablet holder?
See photo: First, loosen the following screws. The holder can then be removed and replaced.
My treadmill won’t turn on – what should I do?
You may often be able to fix the problem yourself without affecting your warranty.
Follow these simple steps to check for possible causes and resolve the issue:
- Switch off the treadmill and unplug it from the power supply.
- Carefully open the motor cover.
- Check that all cable connections are secure.
- If necessary, firmly reconnect any loose connections.
- Close the motor cover and plug the treadmill back in.
If your treadmill still does not work after following these steps, I recommend contacting our customer support team for further assistance.
Troubleshooting & Quick Fixes
Error SAFE – Safety Key
⚠️ Error SAFE – Safety Key
Description:
The safety key is not in place, or the magnet is too weak. Your treadmill will not start unless the key is correctly in place.
Solution:
Check that the safety key is correctly inserted in its designated slot.
Check the magnet strength – if the magnet is weak, you can try using a different magnet.
If this does not help, you will need a replacement safety key.
👉 You can easily replace it at home – without affecting your warranty and much more conveniently than returning the product. If this does not resolve the issue, we will be happy to collect your device under warranty. Don’t worry: if anything does not go as planned during the replacement and the device is damaged as a result, we will of course take responsibility – provided you have handled the device carefully and respectfully.
Applicable to: all models with a safety key
Error 1 – Cable Connection
⚠️ Error 1 – Cable Connection
Description:
The cable connection between the display, console or PCB in the motor area may be loose, disconnected or defective.
Solution:
Unplug the device from the power supply.
Open the motor cover.
Check all plug connections: are they secure, and are any cables broken?
Reassemble the device and test it.
👉 If the problem persists, a replacement circuit board is probably required.
➡️ You can easily replace it at home – without affecting your warranty and much more conveniently than returning the product. If this does not resolve the issue, we will be happy to collect your device under warranty. Don’t worry: if anything does not go as planned during the replacement and the device is damaged as a result, we will of course take responsibility – provided you have handled the device carefully and respectfully.
Error 2 – Motor or Control Board
⚠️ Error 2 – Motor or Control Board
Description:
The motor or control board needs to be replaced.
Solution:
👉 Order the motor or control board directly via the chatbot.
➡️ You can easily replace it at home – without affecting your warranty and much more conveniently than returning the product. If this does not resolve the issue, we will be happy to collect your device under warranty. Don’t worry: if anything does not go as planned during the replacement and the device is damaged as a result, we will of course take responsibility – provided you have handled the device carefully and respectfully.
Error 4 – Voltage Problem
⚠️ Error 4 – Voltage Problem
Description:
The device is not receiving enough power, or the control board is defective.
Solution:
Unplug the device and wait a few minutes.
Open the motor cover and check the plug connections.
Plug the device directly into a wall socket (do not use an extension cord).
Try switching off other high-power devices.
If this does not help → replace the control board.
👉 You can order spare parts directly via the chatbot.
➡️ You can easily replace it at home – without affecting your warranty and much more conveniently than returning the product. If this does not resolve the issue, we will be happy to collect your device under warranty. Don’t worry: if anything does not go as planned during the replacement and the device is damaged as a result, we will of course take responsibility – provided you have handled the device carefully and respectfully.
Error 5 – Control Board / Motor
⚠️ Error 5 – Control Board / Motor
Description:
In most cases, the control board needs to be replaced. If this does not help, the motor is defective.
Solution:
👉 Order spare parts directly via the chatbot.
➡️ You can easily replace it at home – without affecting your warranty and much more conveniently than returning the product. If this does not resolve the issue, we will be happy to collect your device under warranty. Don’t worry: if anything does not go as planned during the replacement and the device is damaged as a result, we will of course take responsibility – provided you have handled the device carefully and respectfully.
Error 7 – Motor Overvoltage
⚠️ Error 7 – Motor Overvoltage
Description:
This is often caused by the running belt being too tight.
Solution:
Loosen the running belt (as described in the manual).
If necessary, tighten it slightly, but not as much as before.
If the problem persists → replace the motor.
👉 You can order spare parts directly via the chatbot.
➡️ You can easily replace it at home – without affecting your warranty and much more conveniently than returning the product. If this does not resolve the issue, we will be happy to collect your device under warranty. Don’t worry: if anything does not go as planned during the replacement and the device is damaged as a result, we will of course take responsibility – provided you have handled the device carefully and respectfully.
Error 8 – Defective Drive Motor
⚠️ Error 8 – Defective Drive Motor
Description:
The drive motor is probably defective.
Solution:
👉 Order the replacement motor directly via the chatbot.
➡️ You can easily replace it at home – without affecting your warranty and much more conveniently than returning the product. If this does not resolve the issue, we will be happy to collect your device under warranty. Don’t worry: if anything does not go as planned during the replacement and the device is damaged as a result, we will of course take responsibility – provided you have handled the device carefully and respectfully.
The spare parts list includes all individual parts used, from assembly through to use.
The manual contains all the important information.