T520A (From: August 2017)

REF: 8381450



In stores: August 2017

Designed for walking and running at low intensity. The T520A treadmill is ideal for running at a gentle speed at home. It is simple and intuitive to use, making it the perfect option for getting back into cardio.



VERSATILITY: Ease in with a max speed of 13 kph and a max incline of 10%

USER COMFORT: Running deck designed for jogging: 43x121 cm

COACHING: 10 pre-set programmes: 5 health and 5 calorie-burning options

Assembling and setting up

Thank you for purchasing a Domyos product. To help you get your equipment up and running, click on the video to see the different set-up steps.

Setting up and using your product

Thank you for purchasing a Domyos product. We've gathered together some handy tips to help you when you first set up and use your machine. 

How to start your product

1. Plug in the power cord.

2. Flip the switch near the power cord to "I".

3. Stand on the treadmill's footrest.

4. Clip the safety key to your clothing.

5. Insert the safety key into the slot on the console.

6. Your screen will light up and display GO.

7. Your treadmill is ready to use!

What is a calories programme?

This treadmill offers 10 pre-set programs that vary the speed and incline based on your goals.

The five "Calories" programmes are designed to enable weight loss during and after sessions.

This type of workout allows you to burn calories effectively. There is no need to force yourself to go beyond your limits; the frequency (at least three times per week) and the duration of your workouts (35 to 60 minutes) will lead to best results. Exercise at a medium speed (moderate effort without shortness of breath).

To lose weight, in addition to regular physical activity, it is essential to eat a balanced diet.

T520A (From: August 2017)
How can you see the total distance and time run on the treadmill?

You are able to see how far you have run and how many hours of running you have done since first starting your treadmill. This can be done as follows:

T520A (From: August 2017)
What is a healthy programme?

This treadmill offers 10 pre-set programs that vary the speed and incline based on your goals.

The five Health programmes keep you moving, improve your muscle tone and increase your lung capacity.

For maintenance or recovery, work out every day for at least 10 minutes. This type of exercise helps work the muscles and joints gently and can be used as a warm-up before more strenuous physical activity.

To increase muscle tone in the legs, choose a greater incline and increase your duration.

T520A (From: August 2017)
Directions for use

1. If you are a beginner, start by training for several days at a low speed, without overexerting yourself, and taking rest periods if necessary. Gradually increase the number or duration of your workouts. During your workout, be sure to ventilate the room where your treadmill is located.

2. Cooling down: After each workout, walk a few minutes at a low speed to gradually bring the body to rest. This cool-down phase helps bring your cardiovascular and respiratory systems, blood flow and muscles back down to normal. This makes it possible to eliminate counter effects such as lactic acid build-up, which is one of the major causes of muscle pain (cramps and muscle aches).

3. Don't forget to stretch. We recommend that you stretch and hydrate after each workout to relax your muscles and promote recovery.


Is your equipment properly set up but you're still having an issue when using it? See all our FAQs here.

You're getting an e1 error code

Check the connections in steps 1,3 and 4 of the user guide. 

Check that none of the pins are bent or wires cut.

T520A Error E1
Your console isn't showing the right speed

Before you start, make sure your treadmill is plugged in to the mains.

1. Press the "STOP" button.

2. Hold down the "STOP" button and insert the "SAFETY KEY".

3. The units being used are displayed in the bottom right corner:     UNIT MI   or  UNIT KM.

4. Press "+" to change the unit.

5. Press "STOP" to confirm the changes.

6. You're now ready to use your treadmill.


T520A (From: August 2017)
Your treadmill doesn't switch on

1. Check that the power cord is plugged into a working mains socket (to check if the wall socket is working, plug in a lamp or other electrical device).

2. Check that the other end of the power cord is connected to your treadmill.

3. Check that the main switch near the power cord is in position I.

If the switch does not come on, watch this video to find out how to check the fuse: 


4. Check that the safety key is pushed fully into the console.

T520A (From: August 2017)
Your treadmill is making a noise

1. Shoes:

=> The noise you can hear could be the sound of your shoes on the running belt. To check that the noise isn't coming from your shoes, please see the video below


2. The screws are loose:

 => Tighten all of the screws.


3. The running belt is wonky:

=> Click on the "CENTRING THE RUNNING BELT" tab in the MAINTENANCE section.


4. The running belt is not lubricated:

=> Click on the "RUNNING BELT LUBRICATION" tab in the MAINTENANCE section.

How do you activate/deactivate the console's beep?

When you press a button on the console, a beep notifies you that your action has been taken into account. You can deactivate this beep:

1. Access the home "GO" screen on the console by clicking the "STOP" button several times.2. Press the "+" button to turn the "beep" sound on. / Press the "-" to turn the "beep" sound off.3. To exit, wait for 5 seconds until the display returns to GO.

T520A (From: August 2017)
The treadmill slows down when you step onto it

The running belt is slack:

=> Select the "RUNNING BELT TENSION" tab in the MAINTENANCE section.


The treadmill switches off during use

1. If your treadmill is plugged in to an extension cable, unplug it and plug it directly into a wall socket.

2. The problem could be caused by the power cord. In this case, please see the FAQ on "YOUR TREADMILL IS NOT SWITCHING ON"

Trouble detecting heart rate with the handpulse sensors

Slightly dampen your hands and place both hands on the sensors.


T520A (From: August 2017)
The "go service" message appears on your screen

Every 200 km, the word "service" flashes up on the "GO” home screen. This message reminds you that your equipment is due for a service.


To delete the flashing message:

Access the start/home "GO" screen on the console by clicking the "STOP button several times."

Hold the "STOP" and "^"buttons down for a few seconds.

T520A (From: August 2017)
Parts diagram


Exploded view T520
T520A (From: August 2017)

You weren't able to fix your problem or didn't find the answer to your question? 


T520A (From: August 2017)

Composition / advice


Frame // Chassis (for rollers):

80% steel,

20% Polystyrene (PS)


40% copper // 35% steel // 10.0% brass // 10% epoxy // 5% aluminium



Max user weight: 130 kg. This treadmill was designed for up to 5 hours of use per week.



1. The treadmill's energy use is 750 to 850 W for a user weighing 90 kg running at 13 kph.~2. The sound pressure level measured at 1 m from the surface of the treadmill and at a height of 1.60 m from the ground is 70 dBa (at a maximum speed of 13 km/h, without a runner).~3. The sound level emitted under no-load conditions is lower than that emitted during operation with load.~4. The running surface is 43 cm x 121 cm.

Servicing your product

It takes care of you, so you should do the same for it. Regular maintenance is necessary to preserve the performance of your equipment and extend its service life.

Preventative care advice

1. Check the motor and the drive belt every 600 hours of use or every 3,600km*2. Replace the running belt every 500 hours of use or every 3,000km*3. Replace the running deck every 700 hours of use or every 4,200km*4. Replace the rollers every 600 hours of use or every 3,600km*


*To find out the number of hours of use or the total distance run, go to the FAQ and read " HOW TO FIND OUT THE DISTANCE RUN AND HOURS OF USE ON YOUR TREADMILL" in the SETTING UP AND USING YOUR PRODUCT section

Regular maintenance

Regular maintenance is necessary to preserve the performance of your appliance and extend its service life. To get rid of any annoying noises coming from your treadmill, remember to

                       Tighten the screws and bolts once a month.

                       Lubricate the running belt after 200 hours of use.

                       Place a standard floor mat (Domyos Training Mat) under your treadmill.



                      Turn off and unplug your treadmill.

                      Apply a small amount of gentle universal cleaner to a pure cotton cloth. Do not spray the cleaner directly onto the treadmill and do not use ammonia or acid cleaners.

                      Wipe the console and screens.

                      Remove any dust and stains on the ramps, uprights, footrests, frame and motor hood. Remember to also wipe the platform alongside the running belt. Do not clean under the running belt.

The ""go service"" message appears on your screen


T520A (From: August 2017)
Centring the running belt

You will need the 6mm Allen key (BTR) that came with your treadmill: 

1.  Start your treadmill at a low speed (4km/h).2.  Insert the key into the screw on the side where the running belt is off-centre.3. Turn it a quarter turn clockwise (wait 30 seconds between each quarter turn) until the belt is back in the correct position.


Running belt lubrication

It is important to do this regularly (every 200 hours of use) to extend your treadmill's life.  1 & 2. Two sprays to the left and right of the running belt will suffice.  3. After spraying, let your treadmill run without anyone on it for five minutes at 5 kph.

Running belt tension

The running belt is a wearing part that becomes loose over time. Re-tighten it as soon it begins to go slack (sliding sensation, jerky motion).


1&2. Turn the two adjustment screws a half turn clockwise (repeat if necessary, but make sure you don't over-tighten the belt).


3. The belt is properly tightened if you can lift the edges 3 to 5 cm on each side.

T520A (From: August 2017)

Order spare parts for this product



  • T520A (From: August 2017)

    Need the product's user guide? Click to download.

T520A (From: August 2017)

Our commitments

Domyos guarantees this product under normal conditions of use for five years for the structure and two years for other parts and labour from the date of purchase shown on the receipt.