YUME YMD4+ User manual

Shenzhen Yunmi Intelligent Technology Co., Ltd
ELECTRIC SCOOTER MANUAL
YMD4+ / YMD5

Shenzhen Yunmi Intelligent Technology Co., Ltd
2
Folding process:
1. Press the button on the rod to lower the handle first.
2. Pull out the outer ring and folding the handle.
3-4. Press the Folding button under the seat. Release the folding lock on the pedal, then folding the seat.(optional)
5-6. Pull out the folding lock first. And then Press white button as the picture shows. Set down the rod when the
button locked again.
Opening process:
Press the white button and set up the rod. Push in the safety lock and follow the steps against folding. ( Make sure
the safety lock is settled tightly, otherwise it will influence your safety when you are riding.)
Notice: because of the product upgrade, there may be some difference between the product actually get and the
instruction manual. Not affecting the normal usage

Shenzhen Yunmi Intelligent Technology Co., Ltd
3
JP-Y2 model display specification
1：JP-Y2 Meter Display
Two buttons on meter display, Power button and function button。
While pressing function button and power button together , data of meter can be set：
While displaying P0, press function button , it will display P1; press function button again, it will display
P2, P3, P4, P5, P6, P7. They mean separately: P0 Wheel diameter setting
；P1 Undervoltage setting; P2 Magnetic pole logarithm setting; P3 Speed signal selection setting; P4 KM/MILE
Exchange Setting; P5 Zero or non-Zero Start Setting; P6 Cruise or no cruise speed selection settings; P7 为Soft
or hard start Selection Setting
Display P0, press power button , it shows wheel diameter. To change wheel diameter, press function
button to plus one; press power button to subtract one. Wait for seconds, automatic exist waiting for
seconds.
Display P1, press power button , it shows the voltage value of the battery under voltage; for example,
displaying 315 means under voltage value is 31.5V. To change undervoltage value, press function button to
increase 0.5, or press power button to subtract 0.5;
Display P2, press power button , it shows motor’s magnetic pole number. Press function button to
increase 1, or press power button to subtract 1;
Display P3, press power button , it shows 0 or 1 which means speed signal selection Settings. While
displaying 0(generally to choose 0), it means to choose hall signal speed measurement. While displaying 1, it means
to choose external signal;
Display P4, press power button , it shows 0 or 1, which means KM/MILE selection setting. While
displaying 0 means KM, showing Km/h; displaying 1 means MILE, showing Mp/h;
Display P5, press power button , it shows 0 or 1, which means Zero or non-Zero Start Setting (some
scooter do not have). While displaying 0 means zero start; while displaying 1, PAS appear, it means non-zero start;
Display P6, press power button , it shows 0 or 1(some scooter do not have), which means cruise or no
cruise speed selection setting. While displaying 0 means no cruise; displaying 1 means cruise;
Display P7, it shows 0 or 1 which means soft or hard start selection setting(some scooter do not have). While
displaying 0 means soft start(gentle while starting); while displaying 1 means hard start(big impulse at the start)
Display P8,press power button ,it shows
5~100,this option is speed limiting.This option can be

Shenzhen Yunmi Intelligent Technology Co., Ltd
4
freely adjusted between 5 and 100,When 5 is displayed, it represents 5% of the maximum speed of the
controller,When 100 is displayed, it represents infinite speed, and the controller works normally.
Display P9,press power button ,it shows 0，1 or 2,Indicates the penetration strength of EBS brake when
the power is off.When 0 is displayed, there is no EBS braking effect: when 1 is displayed, EBS braking is weak.When
shown 2, EBS brake is strong;(EBS brake is used to reverse the current through the controller to stop the motor
rotation and hold the motor to death)
5. Failure Display
When scooter is failed, meter will display failure of parts, respectively brake failure , motor failure , throttle turn
failure , Controller failure , etc.
3:DK-218（This button only belong to dual drive scooter）
DK-218 Red button is dual drive switch（can exchange single drive and dual drive）
Yellow button is high-speed and low-speed（can adjust or limit the speed）
4: Folding of T-Bar
Pull the right and left clutch outwards and fold the handlebars down
5:Ring Clamp

Shenzhen Yunmi Intelligent Technology Co., Ltd
5
Used to fix and adjust the height of T-bar(Attention: ensure the clamp locked before riding)
6: Folding Switch
Slightly pull the safety lock of folding handle, press handle of axis to fold it.(Attention: ensure the safety lock of folding
handle in the groove before riding)
7: Folding seat（This part is only suitable for scooter with seat.）

Shenzhen Yunmi Intelligent Technology Co., Ltd
6
8: Kickstand
Ensure the kickstand is folded before riding.

Shenzhen Yunmi Intelligent Technology Co., Ltd
7
9: Lights
9.1：10 inch scooter is high-light DB headlight; 11 inch scooter is dual angel eyes headlight + high-light DB headlight.
9.2：Tailight
When scooter start and brake, taillight will light.
BASIC OPERATION
1. Power on/off
Long press power button for 3 seconds, instrument will be light, which means power on. Power will be
automatically off without any operation for ten minutes. Press accelerator, user can control the speed between 1~25
km/h.
2. Power display
The number of grids shows the remaining battery power.
Attention: while power shows 0 grid, scooter must be charged immediately. Do not let grip disappear totally, which is
easy to damage the battery.
It is suggested to charge if there is only one grid power.
3. Riding Operation
Ready to start
3.1. Choose a wide and flat place.
3.2. Unfold the scooter.
3.3. Adjust the height of T-bar
3.4. Ensure all safety clamp closed tightly.
3.5 Press power button.
3.6 One is on scooter, and the other is on the ground.
3.7 The scooter will begin to move by triggering speed switch. Put two feet on pedal at the same time. The bigger the
angle of speed switch, the faster scooter moves.
4. Stop Scooter
Grip the brakes, power for motor will be cut down immediately and scooter will be slowed down. Then put one foot on
the ground.
USAGE AND MAINTENANCE
1. Battery and charger
The scooter is equipped with dedicated Lithium battery and intelligent charge. Do not use other brand’s charger.
Other battery is also not suitable for this charger. You can charge it at any time to ensure power full, which does not
damage the battery. The power will be changed based on difference of temperature, terrain, battery itself and weight
of user.

Shenzhen Yunmi Intelligent Technology Co., Ltd
8
2. Charger
Intelligent charger owns over-charge protection function. While battery is charged to 100%, it will stop charging
automatically(Suggest to pull out the plug immediately after full charge. )
3. Battery
Lithium battery equipped in scooter do not need any maintenance, but please pay attention to the following events
and limits of lithium battery same as other type of battery.
1. Do not ride in the rain.
2. Do not expose in the sunshine with high temperature.
3. Charge scooter full after receiving it.
4. Charge after riding.
5. Do not let scooter run out of power completely.
6. The riding time and range is shorten obviously after one charge, please replace the battery.
7. Check the battery every three months if you do not ride, and charge the battery on request.
8. The battery will be affected by temperature. The best temperature is 25℃.
Attention: Do not put scooter there without any charge more than 90 days. Or keep the battery power off over 10
days. In these case, the battery may get damaged.
4. Brakes
When braking performance begins to deteriorate, check whether there is brake oil in the tubing or not. If there is no
brake oil, add it to get brakes to the required sensitivity. If brake oil is added, but brake performance is still not good,
and the brake sounds noise. The brake pads needs to be replaced.
5. Folding Parts
When you feel the grip loosen, adjust the screw between the grip and the T-tube with a hex wrench. When the body
tube starts to loosen, tighten the screw underneath folding part connecting the bar tube and scooter body.
6. Lubrication
Add a little lubricant into the clutch sleeve of the folding handle every six months as maintenance.
Attention: Do not use wd40 to lubricate spare parts, also not lubricate front and rear wheel. If there is any questions,
please contact us.
7. Tire
When the tires get obvious wear or tear, please replace.
8.Cleaning
1. Use suitable cleaning agents as well as protective agents and soft cotton
2. Do not use solvents.
3. It is forbidden to spray the water column directly to scooter.
4. Rinse with clean water after cleaning to ensure no detergent residues。
5. Wipe with a dry cloth
6. Clean the brake parts very carefully in a safe place. Water vapour on brake components may cause brake
malfunction。
7. Refuel protection oil on elastic parts.
General Questions
Scooter cannot be power on

Shenzhen Yunmi Intelligent Technology Co., Ltd
9
1. Check whether battery gets power or not.
2. Open the foot pedal and check whether the battery fuse is not inserted or has been burnt out.
3. Open the pedal to check whether the connector between main line of accelerator and controller is plugged in or
not.
4. Open pedal to check whether the connector between battery and controller is plugged in or not.
Battery cannot be charged
1. Connect the charger to scooter and charging socket to check whether the indicator light will be on or not.
2. Open the foot pedal and check whether the battery fuse is not inserted or has been burnt out.
Scooter cannot accelerate.
1. Confirm whether the brake lever is rebounded to original position or not.
2. Open the foot pedal and check whether the connector between the controller and the motor is plugged in
If actions above have been completed, but the product still does not operate normally. Please contact us.
Warranty Coverage
If product has the following problems within warranty period, the product distributor will provide a complete
after-sales service within the scope of the quality guarantee.
Attention: to ensure your safety during use, do not disassemble or modify product.
This will cause some unpredictable security risks. Products that are disassembled or modified without permission will
not be able to enjoy free warranty service.
Within the warranty period, failure or damage caused by the following causes is not within the scope of quality
assurance:
1. Not properly maintained in accordance with this
instruction manual.
Spare Parts
Problem
Warranty Period
Service Content
Motor
Malfunction in normal use
12 months
Free Repair
Accelerator
Malfunction(Not caused by
impact or external force)
6 months
Free Repair
Controller
Malfunction in normal use
6 months
Free Repair
Battery
Cannot charge or range is too
short after charging
500 times or 6
months
Free Repair
Frame Body
Distorted or broken in normal
use
12 months
Free Repair

Shenzhen Yunmi Intelligent Technology Co., Ltd
10
2. Damage or malfunction caused by using product as dangerous purposes such as performance stunts.
3. Disassemble without permission or use other brand spare parts
4. Undefined use, traffic accident or other impacts
5. Driving on an abnormal road causes to damage or malfunction.
6. Commercial rental use or improper use of non-privilege
7. Irresistible Disaster
Attention: The product warranty must be in accordance with the warranty card, original purchase certificate or proof
provided by each dealer, please keep it carefully.