MJM TRF21 User manual

User Manual
TRF21

2
Thanks for choosing MJM
We are excited that you have chosen to join the copper movement. MJM
was founded on the goal of delivering an uncompromised product that also
doesn’t cost a fortune. We love to help our customers find that inner child joy
of riding a bike without the eort and strain of having to pedal yourself up
hills and through wind.
Read through this manual carefully before operating your bike for the first time.
We highly recommend having a bicycle mechanic assemble your bike if you are
not comfortable doing it yourself.
If you have any questions about your product, please reach out and ask.
You can contact us at:
[e-mail]
403 475 6488
Again, thank you for choosing MJM. Ride On!
Safety Check
It is important to check over the bike before use to ensure a safe ride.
Check all quick releases to ensure they are tight. This includes the front
wheel and seat post. Ensure wheel bolts, brake caliper bolts, handle bar bolts,
and pedals are all tight. Inflate tires to within the recommended psi range.
For the TRF21 we recommend 18-20 psi. Test brakes and shier to make
sure they are operating normally.
User Manual
TRF21

3
Maintaining your ebike
Our ebikes just like all bikes require regular maintenance for optimal
performance. Regularly cleaning the bike will reduce any potential
wear over the years.
Lubricating the chain, derailleur, and sprocket will keep your bike running
smooth, reduce wear, and minimize risk of greater problems over time.
We recommend using a chain lube made specifically for bikes. Apply every
100km to keep your bike running smoothly.
Inspect the spokes to ensure they are tight. With the extra stress the motor
puts on the rear wheel it is important to regularly check for any loose spokes.
If some seem more loose than others use a spoke wrench to tighten them
to be the same tension as the others.
Inspect your bike on a regular basis for wear or any potential issues that can arise.
If you are not comfortable working on your bike we recommend bringing your
bike to an MJM location or to a trained bicycle mechanic to work on your bike.

4
Battery
The battery is a 48V 17.4 AH lithium ion battery. The battery comes with LEDs
and a button on the top of the battery for checking battery level, a handle for
easy carrying, a key for locking the battery on one side, and the charging port
on the other side.
Installation and Removal
To install the battery on your bike, first fold the seat up using the lever
under the seat. Then fit the rail on the bike to the slot on the back of the battery.
Allow the battery to slide down onto the bike. Finally twist the key clockwise
until you hear two clicks.
To remove the battery twist the key counter clockwise for two clicks,
then using the handle pull upwards until the battery is o the bike.
There are 3 dierent locking positions on the battery:
1. Unlocked: Key is twisted fully counter-clockwise. You can remove
the battery from the bike. The bike will not turn on.
2. Parked: Key is twisted clockwise for one click. Battery is locked to the bike.
You can remove the key. The bike will not turn on.
3. On: Key twisted from position one, two clicks clockwise. Battery is locked to
the bike. You cannot remove the key. The bike will turn on.
See video for demonstration:
https://www.youtube.com/watch?v=wCu2NPIjrKo

5
Charging
For charging, plug the battery into the charger. You will see a red light on the
charger indicating that it is charging. Once the light turns green the battery is
at 100% and the charger will automatically stop charging.
Although the charger does automatically shut o, it is not recommended you
leave the battery on the charger for long periods of time. In the rare event that
this function fails it can cause serious damage to the battery.
Charging should take 4 - 6 hours. If your battery is still not fully charged aer
12 hours on the charger, contact MJM as there is likely something
wrong with the battery or charger.
• avoid blocking the fan on the charger to prevent overheating
• avoid charging in extreme temperatures. Charging between
10 - 25 degrees Celsius is ideal
• do not charge in strong sunlight
• only use the charger that has been supplied to you. If you require
a new charger contact MJM and we will be happy to assist
Battery Storage
• avoid storing in extreme temperatures. Storing at 10 - 25 degrees
Celsius is ideal
• store in a dry location. High humidity can damage the battery
• if storing for months at a time, store battery between 70% and 20%.
Avoid storing fully charged or fully depleted
• check the battery each month and top up the charge if necessary
Battery

6
Turning the bike on and off
Press and hold the power button. You will see the display flash on and show all
your information. To turn o, press and hold the power button until the screen
turns o. It should only take a few seconds.
Note: The bike will
automatically turn o
aer 5 minutes if the
bike is stationary.
Display and
Controller
Note: First ensure
the battery is charged
and installed on the
bike correctly.

7
Pedal Assist (PAS)Levels
This is the level of assistance the motor will deliver once activated. Your bike
has 5 PAS levels numbered from 1 - 5 with 1 being the lowest level of assistance
to 5 being the highest. Use the “+” and “–” buttons to adjust the PAS level.
If you want to ride with no assistance press the “–” button until a 0 is shown
in the assist section.
Lights - Turning on and off
Our bikes are fitted with automatic lights and will turn o and on depending
on the environment you are in.
To manually turn the lights on and o, when the bike is turned on press and hold
the “+” button. Aer a couple seconds you will see the headlight icon pop on your
display, both the front and rear lights will turn on. Once you see this, release
the “+” button and the lights will remain on until turned o or the bike turns o.
To turn o, repeat this process until you see the lights turn o.
Walk Function
The walk function activates the motor at a slow speed to assist you
in walking the bike.
Press and hold the “–” button. Aer a couple seconds the motor will activate
and you will feel the bike move forward. Hold the “–” button while using the
walk function. Once you release the “–” button the walk function will turn o.
• the walk function will not work if you are holding the brakes
Display and
Controller

8
Modes
Your bike can track and display a variety of information from the
main screen that can be changed using the “i” button.
MAX: Will show your
current max speed.
AVG: Average speed. TIME: Tracks your
total ride time.
ODO: Odometer will display the
total kilometers the bike has travelled.
This cannot be reset.
TRIP: By default when you turn
the bike on it will display your trip
in the bottom le. This will track
the distance you have travelled
in kilometers and can be reset
whenever you desire. See settings
mode for these instructions.
Settings

9
Settings
To enter the settings menu press and hold the “+” and “–” buttons
together for a couple seconds. The display will change and you will see
multiple icons. Use the “+” and “–” buttons to toggle through the settings,
use the “i” button to select.
Wheel
Setting the wheel diameter.
Use the “+” and “–” buttons to
adjust the wheel diameter then
press “i” to confirm. The setting
for the TRF21 must be set to 26.
Speed Limit
All our bikes are set to 32km/hr.
Brightness
Adjust display brightness.
Voltage
Sets the voltage output of the
bike at each power assist level.
The default is 48V. It is not
recommended you change
these settings.
Advanced
See advanced settings section.
Dormancy
Sets how long the bike will stay
on before shutting o when there
is no input. The default is 5 minutes.
Unit
Can toggle between metric
and imperial measurements.
Password
If you would like to set a password
to lock the display whenever the
bike turns o, you can set that here.
The default is no password.
Factory
This will reset everything back
to its original factory settings.
Display
To reset the trip select
“Trip Reset” with the “i” button so
the “NO” turns yellow. Once “NO”
is highlighted yellow press the “–”
button and it should change to “YES!”
Press “i” one more time and “YES!”
should change to “Reset Clear”.
The trip is now reset.
AL Sensitivity
“Automatic Light Sensitivity”
Adjusts the sensitivity of when the
automatic lights will turn o and on.
The default value is 3.
Exit
Return to the main display screen.
Settings

10
Advanced Settings
1. Speed Sensor
2. Assistant Num
3. Power Set
4. Current Limit
5. Sensitivity
6. Slow Start
7. SOC V
MJM does not recommend changing any of the advanced settings.
Error Code
21 - Current Abnormality
22 - Throttle Abnormality
23 - Motor Abnormality
24 - Motor Hall Signal Abnormality
25 - Brake Abnormality
30 - Communication Abnormality
In the event your ebike flashes an error code contact MJM
and we will be happy to assist you.
403 475 6488
[e-mail]
Settings

11
MJM Care Tips
We want your ebike to work well for years to come, so here are some
things you can do to make your bike last as long as possible:
Keep it clean
A dirty bike can lead to rusting, unnecessary wear, and unwanted sounds.
As there are electronics involved, use water sparingly to avoid damaging
the bike. We recommend buying a bike specific wash for cleaning your bike.
Household cleaners like dish soap or detergent may contaminate and damage
some components. For cleaning your brake rotors, use a clean microfibre or
paper towel and isopropyl alcohol.
Get it checked over
We recommend you have your ebike professionally inspected once a year.
This is a service just about any bike shop oers and is something we oer in
our shops for $50. This inspection will ensure your bike is working well and will
enable you to stay on top of the wear your bike will inevitably endure. As you ride,
parts like your brakes, tires, chain, and gears all slowly wear out. Tracking this
wear and replacing these parts as needed will make sure you have the
best experience with your bike.
Unsure? Just ask
If there is anything you are unsure of, whether it’s how to maintain or clean
your bike, or something that seems not quite right, reach out and ask us!
We are always happy to help answer questions.
Care Tips

12
Warranty
Thank you for purchasing an MJM Ebike. This bike, if properly maintained,
will give you years of enjoyable riding. Below is the MJM Wheels warranty
outline. Please review it and do not hesitate to ask any questions you might
have regarding it. For full details on our policy please visit the warranty
section found on our website.
You have purchased much more than a typical bicycle. It is heavier, full of
electrical and mechanical components and connection points, and more
expensive than a typical bike. For that reason, you should have an annual
maintenance check over and servicing done on the ebike to keep your
investment operating at its peak condition.
Basic Terms
1. Electronics - 1 year from the date of purchase on controller, motor,
battery, lights and display against manufacturer defects.
2. Paint and Graphics - 1 year from date of purchase.
3. Frame - 2 years from date of purchase against cracks.
4. Mechanical Wear Parts - 30 days from date of purchase against manufacturer
defects - rims, spokes, tires, chain, suspension, seats, and brakes.
For more information on our warranty visit the warranty page on our website.
www.mjmebikes.com/warranty

13
MJM Wheels
3324 114th Avenue SE
Calgary, Alberta T2V 3V6
403 475 6488
[e-mail]
mjmebikes.com
Contact