SONGZO MX03 User manual

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user's manua
user's manual
This manual uses the English language version, please refer to P01-P20 for the English
version.
*Please read this manual carefully before using the SONGZO electric bicycle.
*Please keep the original packaging of the bicycle so that it can be used for repacking when returning or replacing
the product.
*Please refer to the installation video to install the bike correctly and check if any screws are loose.
1. Before turning on the bicycle, please make sure that the key has been turned to the correct
position (there are three positions for opening, closing and removing the battery). The bicycle’s
battery is equipped with two keys, please keep them safe, one of which is stored at home. Once
both keys are lost, you have to buy a new battery head to replace it, which will be more difficult.
2. All SONGZO bicycles can set speed limit. Just enter the setting mode of the LCD meter and adjust
the parameter of P08 to 25, and the maximum speed of the bicycle can be limited to 25km/h.
How to enter LCD meter setting mode: Long press "up" and "down" at the same time or long press
"+" and "-" at the same time.
*Unless you have understood the meaning of each parameter, please do not set other parameters
at will.

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1.1 Product Specifications
Model
Wheel size
Motor
Battery
Max speed
Riding distance
Load-bearing
R5
26 inch
250W
48V 12.8Ah
25 km/h
35-50 KM
150 KG
MX02S
26 inch
250W
48V 17Ah
25 km/h
35-55 KM
150 KG
MX03
26 inch
250W
48V 17Ah
25 km/h
35-55 KM
150 KG
R8
20 inch
250W
48V 15Ah
25 km/h
35-50 KM
150 KG
M60
27.5 inch
250W
48V 15Ah
25 km/h
35-50 KM
120 KG
R3
26 inch
250W
48V 12.8Ah
25 km/h
30-45 KM
120 KG
*The maximum speed and mileage are determined by factors such as the rider's weight, the artificial power
provided by the rider with the assistance of pedals, the friction of different grounds, and whether the battery
is fully charged or not...

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2.1 Please perform necessary inspections before riding the SONGZO electric bicycle:
1. Is the battery fully charged?
2. Is the key in the open position?
3. Is the braking system working properly?
4. Is the tire pressure normal?
5. Are the handles and seats of the bike firmly installed without any looseness?
6. Are the front and rear wheels locked?
7. Are there any error codes on the LCD screen?
2.2 How to use SONGZO bicycles：
1. When you have confirmed all the conditions and are ready to ride, first adjust the speed gear to gear 1,
twist the throttle handle, and when the bicycle starts to move forward, slowly raise it to the gear you want.
You can make the electric bicycle work by twisting the accelerator handle or stepping on the pedal. Of course,
if you don't want electric assistance when stepping on the pedal, you can change the riding mode through
settings.
2. When facing uphill, headwind, poor road conditions, etc., pedals should be used to assist riding to reduce
battery load and protect battery life.
3. On downhill sections or turning sections, you should slow down in advance, and good riding habits can
ensure safety. When using the Shimano transmission, please do not shift gears frequently in a short period of
time, and do not shift gears across stages, otherwise your chain may get stuck.

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2.3 What you need to know about batteries:
1. During riding, frequent braking will result in shorter riding mileage. When the voltage is lower than half,
please charge it in time. If you ride under the condition of low voltage for a long time, it will affect the battery
life.
2. *If you do not use an electric bicycle for a long time, please charge the battery regularly. It is recommended
to charge the battery once a month. (Because the battery will discharge slowly even when not in use, if the
battery is over-discharged, it may cause irreversible damage.)
3. *The batteries of any electronic devices (such as mobile phones, cameras, computers, etc.) are not allowed
to come into contact with water. If you find that water has entered the battery, please do not use the battery
until it is completely dry to avoid burning the battery or fire. Water in the battery may cause damage to the
battery/deterioration of life. Damage caused by water in the battery is not covered by the warranty.
4. The battery is not allowed to be stored/used under the scorching sun or at a high temperature above
60°C.Be careful not to drop, shock or squeeze the battery to avoid damage tothe battery.
5. When charging the battery, please use the special battery charger provided by SONGZO , and it is strictly
prohibited to use non-original chargers.
6. If you want to buy a spare battery, please buy the original battery in the SONGZO store. If you can't find the
purchase link, you can consult SONGZO customer service. If you use non-original chargers or batteries that
cause damage to other parts of the bicycle (such as controllers, motors, batteries), you will need to purchase
other damaged parts.

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2.4 How to charge the battery correctly:
1. Whether you want to take out the battery for charging or charge the battery on the bike, you should first
plug the charger's charging port into the battery port/bicycle charging port, and then plug the charger's plug
into the power source.
*Please follow this order! ! !
2. When the indicator light of the charger changes from red to green, it means that the battery is fully
charged.Under normal circumstances, it takes 4-6 hours from a dead battery to a full charge.
3. In order to ensure safety, the battery should be placed out of the reach of children when charging and
there should be no other high-power electronic products or flammable or explosive materials around the
battery.It is forbidden to use the charger in an environment with excessive smoke, dust, humidity, and direct
sunlight. Do not use the charger during thunderstorms. Please maintain good ventilation and heat dissipation
conditions when the charger is working.
3.1 Check for loose parts
1. The torque of the handlebar, handlebar support tube, and saddle tube must reach 18 N·m whenlocked.
2. The locking thrust of the folding lever must reach 15-17 kgf, and the release force must be greater than 5
kgf.
3. The tightening torque of the front wheel nut must reach 18 N·m, and the tightening torque of the rear nut
must reach 30 N·m.

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3.2 About the lubrication of parts
Lubrication part: chains, flywheels, and headsets require regular maintenance.
Our suggestion is to drip a little lubricating oil (such as L-AN46GB443) on the position of the chain and the
flywheel every month. Lubricating grease (such as SH/T0386) is added to the head bearings every year.
You can buy lubricating oil for bicycles and add it yourself, or you can add lubricating oil at a nearby bicycle
shop. This is the most convenient method.
3.3 About chain
The best tightness of the chain: use your fingers to push/pick the position of the lower middle of the chain, the
chain can move up and down 10-15 mm.
The tightness of the chain will directly affect the performance of the Shimano transmission.
3.4 Brake pads
1. The wear of the brake pads in the front and rear brakes should be checked every month. If you find that the
brake pads are severely worn, please replace the brake pads in time to avoid affecting the braking effect of the
bicycle.
2. Brake pads are consumables and can be purchased at SONGZO stores or local bicyclestores.
3. In rainy and snowy days, the braking distance should be increased by more than 5 meters when riding.
3.5 Shimano shifting system
Regularly check whether the Shimano transmission can be used normally:
1. Pay attention to the tension of the variable speed inner cable. The tension of the inner cable can be

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adjusted by turning the adjustment screw on the outlet port or the lead port screw of the rear derailleur.
2. The "H" screw of the outer transmission is responsible for the adjustment of the high-speed gear (small
flywheel), and the "L" screw is responsible for the adjustment of the low speed (largeflywheel).
3. When using Shimano transmission to shift gears, if the chain cannot be shifted smoothly or the chain falls
off, please adjust the two screws on the derailleur by yourself, or go to a nearby bicycle shop for simple
adjustments.
If there is any problem with your Shimano transmission, you can take a video and send it to our WhatsApp
account, we will give you adjustment suggestions or videos as soon as possible.
4.1 Folding method
1. For SONGZO bikes that can be folded, the folding handle is in the middle of theframe.
2. Please stand on the left side of the bicycle, hold the folding handle with your right hand, and open the
protective (fixed) buckle first.
3. After opening the protective (fixed) buckle, pull the folding handle to the outside.
4. Push the inner side of the folding frame with your knees outward to let the bicyclefold.
4.2 Precautions
1. After each folding, you should pay attention to the exposed wires of the bicycle. Adjust the wires that are
too tight, so as not to be too tight or rubbing causing the wire skin to wear and cause a short circuit.
2. Please be careful not to drop, impact and squeeze the battery when folding the bike to avoid damage tothe

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battery.
3. The bicycle should be stored in a cool and dry place after folding.
5.1 The power cannot be turned on, and the bicycle cannot work
1. First check whether the key is already in the position to turn on the bicycle. (There are three positions in
total).Can the headlights and horn be used normally?
2. Check the appearance of the bicycle to see if there is any broken/short-circuited wires.
3. Check whether the power switch on the handlebar is normal. If it is hit or damaged, the switch needs to be
replaced.
4. Check whether there are impurities or poor contact between the output port of the battery and the
contact of the controller.
5. If you have a voltmeter, or your neighbor has a voltmeter, you can check whether the voltage of the battery
output port is normal.
5.2 The power can be turned on, but the motor does not work
1. If there is no error code on the screen, please check if there is any damage to the motor cable.
2. Unplug the motor cable and plug it in again. (The interface of the motor cable is on the edge of the rear
triangle of the frame.)
3. Enter the setting mode of the screen and check whether the parameters are set incorrectly. You can ask
GUNAI customer service for the factory parameters.

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5.3 Error code
1. If any error codes appear on your screen, please refer to the table on the nextpage.
2. We recommend that you replug and unplug the wires of the controller and the motor after any error code
appears, because the error code is likely to be caused by loose wires.
3. *You need to pay attention to the operation one by one when you plug and unplug the wires again, so as
not to forget how the wires are connected.
4. If the error code still exists after plugging and unplugging the cable, please take a photo of the error code
displayed on the screen and send it to us, then we will solve the problem for you or provide you with effective
suggestions.
5. When encountering any Error code, we suggest you contact our email or WhatsApp to facilitate sending
photos/videos to each other.This is so that we can solve your problems faster and more effectively.

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E-Code Meaning The Reason Why the E-code Appearance
E00
Normal status
Need to restart or replug the wire.
E02
Brake failure
The brake cable may be broken.
E06
Battery undervoltage
Battery voltage is too low or damaged.
E07
Motor failure
①Loose motor cable plug；
②The motor is damaged.
E08
Throttle handle failure
①Twisted the handle before turning on the
screen；
②
Loose plug；
③
The handle is damaged
E09
Controller failure
The controller is damaged.
E10
Communication
(receive) failure
①The controller is broken；
②The screen (instrument) is damaged.
E11
Communication
(transmit) failure
①The screen (instrument) wire is loose；
②The screen (instrument) is damaged.
E12
BMS failure
Need to replace the battery protection board.
E30
Protocol error
The parameter of P20 is not set to 0.

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6.1 Warranty Principle
1. After you receive the package, please unpack and install the bicycle on the spot to check whether the
bicycle can work normally. If there is any problem, please contact our staff intime.
2. If you want to return the product due to non-quality issues (such as non-compliance, dislike, too heavy or
too big, etc.), you will have to bear the cost of the return.
3. Slight paint drop, abrasion and scratches are not a quality problem. Because bicycles are produced in China,
they are delivered to you after a long distance and many times of transportation. Therefore, bumps and
abrasion during transportation are normal, because we Selling bicycles is not artistic product. If you find too
many scratches on the bike or any part of the bike is broken when you open the package, please take a photo
and send it to us in time.
4. If you encounter any quality problems, please describe to us in detail and attach the necessary
pictures/videos. We will judge the problem based on the pictures/videos you send and provide you with
solutions.
6.2 Warranty Details
1. If the rider fails to use, maintain and adjust the fault in accordance with the provisions of this manual, it will
not be covered by the warranty.
2. When encountering any problems, we suggest you contact our email or WhatsApp to facilitate sending
photos/videos to each other.
3. *The final interpretation of the warranty belongs to the SONGZO official store.

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Warranty Section
Warranty Period
Frame
36 months
Battery, Motor, Controller
6 months
Instrument, Speed Control Handle,
Crank Gear Disk, Front Fork,
Front & Rear Shaft, Flywheel,
Chain, Charger
3 months
Headlights, Pedals, Tires,
Brake Handles and Other Consumables
1 month
*If the parts are damaged due to human factors, please pay for the accessories.
*If the parts are damaged due to man-made reasons, please pay for the parts.
If you encounter any problems, please contact us in time and we will try our best to solve them for you. The
following is our contact information:
Email: pengjiangfeng121[email protected] WhatsApp: [phone]
WeChat: [phone]

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