EN

USER MANUAL

M625/M325 Drive System
Thank you for using BAFANG products.
When using or modifying parameters, please make sure to comply with the local laws and regulations.
Original instruction manual
Read carefully before use. Keep for later reference.
BF-UM-S-M625/M325-1-EN-PRINT, June 2021

﻿﻿C ONTENTSYMBOL INSTRUCTION
If you see the following symbols there is always apossibility of danger.
The warning symbols are as follows:
Note: This symbol indicates information about
how to use the product and highlights specificparts of the User's Guide that are important.

Danger: This symbol indicates possible healthand safety hazards that may arise, if certain
measures are not taken into consideration.
User Manual: Please read the manual before
using the pedelec. If you are not sure about anyof the topics in the manual, please contact yourretailer for assistance.

Caution: This symbol warns against misuse of
the products that can lead to it being damaged
or polluting the environment.

CONTENT
1 Guide2

8 Display2

1.2 	 Before Each Ride2

8.2 	 Introduction of Display

173

8.3 Product Description

17

2 Important Notice8.1 	 Important Notice17

1.1 	 Quick Start

17

2.1 	 For Your Safety

3

8.4 	 Display Information18

2.2 	 Installation and Maintenance3

8.5 	 Key Definition18

2.3 	 Laws and Regulations

4

8.6 Normal Operation

19

3 Vehicle Transport

4

8.6.1 Switching the System ON/OFF

19

4 Environmental Tips and Handling Requirements

58.6.2 Selection of Support Levels

19

5 Guaranty

5

8.6.3 Selection Mode19

6 Installation

6

8.6.4 Headlights / backlighting

19

6.1 	 Summary of the Components

6

8.6.5 Walk Assistance20

6.2 	 Drive Unit Installation

7

8.6.6 SERVICE

6.3 Display Installation

10

8.7 Settings

20
21

6.4 	 Battery Installation

11

8.7.1 “Display Setting”

6.5 	 Speed Sensor Installation

12

8.7.2 “Information”

25

6.6 E-Brake Lever and Throttle Installation

12

8.8 	 Error Code Definition27

6.7 Headlight and Taillight Installation

13

7 Drive Unit

14

9 Battery
9.1 	 Introductions

21

30
30

7.1 	 Introduction

149.2 	 Operation32

7.2 	 Specifications

14

9.3 Specifications

36

7.3 Maintenance16   USER MANUAL – M625/M325 DRIVE SYSTEM

1

1 GUIDE
1.1 	 Quick Start

1.2 	 Before Each Ride

This section provides important information andinstructions that will allow you to use yourpedelec in a safe manner. First, please read thesafety instructions to find out about the legal
regulations that apply to you.
Perform all safety checks in accordancewith the "Before each trip" section.

• Fully charge the battery.
• Make sure the battery is securely locked.

Do not try to ride the bike if you think that yourpedelec might be defected. Before the first ride,please make sure that the retailer has checked
the complete bike before handing it over to you.
It is also recommended to have all componentsof the bike checked regularly, especially if you
ride on a regular basis. If you mistreat thepedelec, it can lead to accidents and injuries.
Please check the pedelec after an accident or if
your pedelec has fallen over.

• Please make sure your pedelec is adapted toyour needs.
• To start the system, press and hold the“ “button on the control panel for 3 seconds.
• Select the support level.
The pedelec is now ready for operation.
Always press the brakes of your pedelec
before placing your foot on the pedal! The
motor starts assisting as soon as you startpedaling. Without the correct procedure, thepedelec can suddenly start, which can lead to
injuries.

12Practice using the pedelec in a quiet and safe
environment. It is important to learn thecharacteristics of the pedelec before you driveon public roads.
Please also take note of additional user manuals
that you received when you bought yourpedelec.
2

USER MANUAL – M625/M325 DRIVE SYSTEM  

Important Notice

2 IMPORTANT NOTICE
Be sure to follow the instructions in the manual
when using this product.

• If you are lending your pedelec to third parties, please give them the instruction manual
along with the pedelec.
• Read the instruction manual carefully andkeep it in a safe place, for future reference.

2.1 	 For Your Safety• This product is not suitable for people withphysical, sensory or mental disabilities, or
children and adults without the necessary
experience. Otherwise, the pedelec must be
used under the supervision of the guardian
responsible for their safety.
• The use of the pedelec is not suitable forchildren under 14 years of age.
• Before driving, make sure you are familiar
with the original features of the pedelec.
• For safety reasons, do not try to focus toomuch on the display of the pedelec whilst
driving. This can be distracting, which canlead to sudden accidents.
• Regularly check the battery charger for damage. Inspect cables, plugs and housings. If
damage is detected, do not use the charger
until it has been checked or repaired.
• Do not change the system without authorization, otherwise errors may occur which
may result in an accident. Also, this can void
the warranty.
• This product is waterproof for all types ofweather. However, it is strongly recommended not to intentionally submerge the productin water or clean it with a steam jet.

   USER MANUAL – M625/M325 DRIVE SYSTEM

2.2 	 Installation and
Maintenance
Make sure that the charger is disconnectedfrom the mains before removing from thepedelec. Remove the battery before working
on/maintaining the pedelec. Otherwise, it canlead to serious injuries and electric shocks.
After a fall or accident, the electricalcomponents may be damaged. If you noticedamage to the battery, remove the battery
immediately, place it in a safe location andcontact your retailer.
Do not replace components, remove or open
modules unless you are performing operations
described in this Manual. If you have any
questions about your system or components,
please contact your authorized retailer first. If
the battery charger, cable or components are
defected or worn out, the components must be
replaced. Please use the manufacturer's original
spare parts. Otherwise, the warranty will be
void.The use of non-original or incorrect spareparts may cause the pedelec to malfunction. If
the product has a defect, please contact yourretailer for a replacement part. The authorized
retailer can only use the original spare parts
from Bafang for maintenance.
Do not use no high-pressure water jet or
submerge in water to clean pedelec. This cancause water to enter into the electricalcomponents or the drive system and shortcircuit or damage the system.
Dispose of the pedelec/battery according to therules and regulations of your country’s origin.
For more information please contact anauthorized recycling center or your retailer.
Depending on riding conditions and thefrequency of use, the service interval may vary.
Please keep in mind that the chain should be3

regularly treated with a suitable chain spray.
Under no circumstances should an alkaline oracidic detergent be used to remove rust. When
this detergent is used, it can damage the chainor other parts of the pedelec resulting in injury
or damage.
Only trained personnel can maintain or repair
the product.

• Remove the battery during transport andstore the battery in a safe and dry place.
• Use this product carefully to allow a longservice life.
• It is advised to write down the battery key
number and keep it safe, in case of damage
or loss.
• Natural wear and aging of the system iscommon after a period of time.

2.3 	 Laws and Regulations
Please observe the relevant road traffic rules andregulations of your country.

Before driving on public roads, please read theapplicable countries regulations carefully. The useof pedelecs on public roads must comply withlocal regulations. Contact your local road traffic
authority for more information.
Incorrect operation of the drive system, battery,charger or drive components can result ininjuries. In this case, the manufacturer may
refuse liability for the damage caused.
Unauthorized changes to the pedelec system
can lead to criminal offences, such as a changeof the speed limit.

Please note the following information:• Please ensure that the light sensor is in
working order, before setting off.
• Please ensure that the braking system isoperational before setting off.

3 VEHICLE TRANSPORT
Remove the battery during transport and store
the battery in a safe and dry place.
Do not transport a battery without the correct
procedure. Batteries are subject to hazard group
9 and are subject to a separate transport
regulation. Please contact an authorized retailer
or freight service provider. The battery can bedamaged, burned or even explode if handledincorrectly.

When transporting the pedelec by train, therelevant laws and regulations must be compliedwith. Before using public transport, please findout which means of transport are suitable fortransporting the pedelec. It is recommended toremove the battery from the pedelec before
transport.
When transporting your pedelec, first Remove
the battery and keep it in a safe place so it does
not move whilst driving. When transportingyour pedelec please be sure to use a pedelec
carrier.

4

USER MANUAL – M625/M325 DRIVE SYSTEM  GUARANTY

4 ENVIRONMENTAL TIPS AND
HANDLING REQUIREMENTS
General cleaning and maintenance: takeenvironmental aspects into consideration when
maintaining and cleaning the pedelec. The product and detergents should be biodegradable.
Use these products at any time just, please makesure that no cleaning agent does not get into thesewage.

Oil

Bat tery

The battery
Battery used in the pedelec is subject to theBattery Ordinance and may only be disposed ofin accordance with the applicable regulations.

5 GUARANTY
All warranty and guarantee conditions are
subject to applicable laws and regulations fromyour brand.

The condition for warranty and guarantee
claims is that the instructions for the system arefollowed carefully.
Liability for material defects does not include
normal aging or wear and tear.
Warranty Period:
Under compliance with local law and reasonable
use, the warranty period ends 12 months after
the date of selling.

Warranty and warranty exclusions:• Modification, manipulation or improper
repair of the product.
• Improper use of the product.
• Damage caused by inconvenience, misuse,
negligence, incorrect installation, improper
repair, incorrect maintenance or improperuse.
• Modifications of the surface structure.
• Damage caused by improper transport orstorage caused by the buyer.
• Damage caused by force majeure.
• Removal or alterations of serial number,plates or product markings.

   USER MANUAL – M625/M325 DRIVE SYSTEM

5

6 INSTALLATIONThe bicycle adapted to the M625/M325 drive system needs to meet the following
requirements:• The upper area of downtube shall have a motion range of 390mm in length and 170mm in heightfor battery installation.
• Cable brake is adopted for the sake of modification of e-brake lever.
• The length of bottom bracket matches the length of motor shaft.
• The CL value of chainring shall be compatible to that of the original bicycle.

6.1 	 Summary of the Components
8

5

6

9
11

7

10
3

4

2
15

14
1

1. Drive Unit

2. Speed Sensor

1213

3. Battery

4. Battery Slide Rail

5. 4A Charger

6. Display

7. Control Panel

8. e-Brake Lever

9. Throttle

10. Headlight

11. Taillight

12. Chainring

13. Crank (left)

14. Crank (right)

15. Hoop

You can scan the QR code to watch the installation video of DIY system.

6

USER MANUAL – M625/M325 DRIVE SYSTEM  

Installation

6.2 	 Drive Unit Installation
6.2.1 List of Tools to be Used
An impact wrench cannot be used.

Use of the Tools

Tools

To fasten M5 screws onto the chainset.

Internal star screw wrench

To fasten M6 screws onto the support and the drive unit.

Internal star screw wrench

To fasten M8 screws on the crank.

Internal hex wrench

To fasten screws on the hose clamp.

Cross screwdriver

Locking ring M33-A

Special tool

Locking ring M33-PH1(B)Special toolSpecial tool   USER MANUAL – M625/M325 DRIVE SYSTEM

7

6.2.2 Motor Installation
NOTE: Before installing the motor, please remove the chainset and crank from the original bike.

A BB support
B Internal star screw

3.

With the special tool to prelock a locking
ring (M33-A) on the motor (Do not tighten
first).

A BB (bottom bracket)

1.

Insert the motor into the BB.

A Locking ring M33-A
B Special tool

4.

A FramePut the rubber washer on the frame, andthen set the hoop set on the motor (Note:rubber washer and hoop set should be
mounted perpendicular to the down tube),
the hoop head is to the right of the frame.

B Motor2.

Put the BB support on the middle shaft ofthe motor, and then with a Internal starscrew wrench to prelock a M6 star screw
on the motor (Do not tighten first).

A Hoop set
B Rubber washer

8

USER MANUAL – M625/M325 DRIVE SYSTEM  

Installation

5.

Tighten the hose clamp on the frame witha cross screwdriver (Note: the hoop should
be tied on the rubber washer, and thehoop is perpendicular to the down tube.
The locking torque is 3-4Nm), and thentighten the unlocked parts of step 2 (thelocking torque is 9-10Nm)and step 3 (thelocking torque is 50-60Nm).
A Chainset
B M5 Internal star screw

8.

Mount the right crank on the right shaft
and with an M8 inner hex screw tighten it,
the locking torque is 35-40Nm, tighten theleft crank in the same way.

A Hose clamp

6.

With the special tool tighten the locking
ring M33-PH1(B) onto the motor (thelocking torque is 25-30Nm).

A Left crank
B M8 Internal hex screw
C Right crank9.

Connect the EB-BUS cable

A Locking ring M33-PH1(B)B Special tool7.

Put the chainset on the output end of the
motor, and then with five M5 star screws
tighten it on the motor (the locking torqueis 25-30Nm).
   USER MANUAL – M625/M325 DRIVE SYSTEM

C Female connector of EB-BUS
cMale connector EB-BUS from drive unit

9

6.3 	 Display Installation
1.

Open the clamps of display and insert therubber rings on the inside of the clamps.

2.

Now place the display on to the handlebar in the correct position. Now with 2
X M3*12 screws tighten the display into
position. Torque requirement: 1N.m.

10

3.

Open the clamp on the control panel andplace it in the correct position, Using 1 X
M3*10 screw tighten the control panel
onto the handlebar. Torque requirement:
1N.m.

4.

Connect the display to the EB-BUS cable.

USER MANUAL – M625/M325 DRIVE SYSTEM  

Installation

6.4 	 Battery Installation

3. Connect the power cable.

For correct insertion, the battery must beconnected, ensuring all pins are correctly
connected to the battery holder. When pushing
the battery into position. Make sure that thebattery has clicked into the locking mechanism
before you set off.

1.

Fasten the slide rail with 2pcs hose clamp
onto the down tube. Please notes it needs
fit rubber for hose clamp before assembly.

A Battery + (red)a Drive unit + (red)B Battery - (black)b Drive unit - (black)

4. Connect the battery communication cable.

2. First rotate the lock to the open position, then insert the battery into the sliderail, and push the battery into the downbracket. Finally rotate the key and lock thebattery.

D Male connector of batteryd Female connector from driver unit

NOTE: The key can only be removed after
the battery is locked, otherwise it can not
be removed.
   USER MANUAL – M625/M325 DRIVE SYSTEM

11

6.5 	 Speed Sensor
Installation
1.

3. Connect the speed sensor to the drive unit.

First insert the speed sensor (A) into the
support (B) and tighten the screw (C) witha screwdriver.
B Male connector from speed sensor
b Female connector from the drive unit

6.6 	 E-Brake Lever andThrottle Installation
1.

Install the left e-brake lever and the grip on
the handlebar.

A Speed sensor
B Support
C Screw

2. First with cable ties fasten the speed sensor
onto the chain stay, and then tighten
mounting screw on magnet to the spokes
with cross screwdriver. Tightening torqueis 1.5–2Nm. Please make sure the gap
between the speed sensor and the magnet
is 5 mm.

2. Now with M5 screw tighten the e-brakelever into position.

A Magnet
B Speed Sensor
12

USER MANUAL – M625/M325 DRIVE SYSTEM  

Installation

3. Install the throttle, the right e-brake lever,and the grip on the handlebar.

6.7 	 Headlight and Taillight
Installation
1.

Tighten the headlight and taillight into
position.

4. Now with M3 and M5 screws tighten thethrottle and the e-brake lever into position.

5. Connect the e-brake levers and the throttle
to the EB-BUS cable.
2. Then connect the headlight and taillight tothe EB-BUS cable.

   USER MANUAL – M625/M325 DRIVE SYSTEM

13

7 DRIVE UNIT
7.1 	 Introduction

Note: Contents in Label part are important
information of this product. Please keep themproperly for updating of software or providing
after-sales service.
The specific parameters are subject to the real
product.

7.2 	 Specifications
Motor model: M625 (MM G321.750/1000.C)• Product Model

Rated power (W)750 / 1000

M625 (MM G321.750.C /MM G321.1000.C)

Noise (dB)≤55

M325 (MM G341.500.C)

Waterproof

IPX5

Certification

UL / ROHS / EN14766 /EN14764

Outdoor
Temperatures-20℃~45℃• ScopeBafang M625/M325 drive systems can only be
used on vehicles intended for off-road use anddesigned to travel on unpaved surfaces. Please
make sure to comply with local laws andregulations.

• Identification
There are the unique identification of the
product on the housing, as shown in figure:

14

Motor model: M325 (MM G341.500.C)
Rated power (W)500

Noise (dB)≤55

Waterproof

IPX5

Certification

UL / ROHS / EN14766 /EN14764

Outdoor
Temperatures-20℃~45℃

USER MANUAL – M625/M325 DRIVE SYSTEM  Drive unit

7.2.1 Outline and Geometric Size
① M625 (MM G321.750/1000.C)
Chain line(CL): 59.6mm② M625 (MM G321.750/1000.C)
Chain line(CL): 75.6mm

BB length: 100mm

BB length: 68mm   USER MANUAL – M625/M325 DRIVE SYSTEM

15

③ M325 (MM G341.500.C)
Chain line(CL): 59.6mm

BB length: 68mm

7.2.2 Surface
Shockproof black coating

7.2.3 Cautions• Storage room humidity: 15-95%RH• The pedelec should be stored in a ventilated
dry room. Avoid storing the pedelec nearstrong magnetic objects.
• Should not be used for a long time overload;• Should avoid wading to use.
• The motor runs at the rated power for 2
minutes and then stops working for 8 minutes.
According to this working, the motor can beachieved the heat balance.
The function of the product is impaired by
the presence of any major caustic gas, any
medium that affects the product’s electricalinsulation properties or any high-intensity
magnetic field.

7.3 	 Maintenance• Maintenance must be carried out by authorized personnel with the correct equipment.
• Do not disassemble the motor.
• Do not use thinners or other solvents toclean the components. Such substances candamage the surfaces.
• Avoid water submerging, to keep the components protected.
• Avoid using high-pressure cleaning jets.
• For prolonged storage, turn off the battery
and avoid storing near heat sources.

16

USER MANUAL – M625/M325 DRIVE SYSTEM  

display

8 DISPLAY
8.1 	 Important Notice• The label marking is as follows:• If the error information from the display
cannot be corrected according to the instructions, please contact your retailer.
• The product is designed to be waterproof. It
is highly recommended to avoid submerging
the display under water.

Note: Please keep the QR code label attached• Do not clean the display with a steam jet,high-pressure cleaner or water hose.

Label is used for a later possible software• Please use this product with care.
• Do not use thinners or other solvents toclean the display. Such substances candamage the surfaces.
• Warranty is not included due to wear andnormal use and aging.

8.2 	 Introduction of Display• Model: DP C181.CAN BUS• The housing material is PC and high strength
material:

to the display cable. The information from the
update.

8.3 	 Product Description
8.3.1 Specifications• Operating temperature: -20℃~45℃• Storage temperature: -20℃~50℃• Waterproof: IPX5
• Bearing humidity: 30%-70% RH

8.3.2 Functions Overview• Speed display (including top speed andaverage speed, switching between km andmiles).
• Battery capacity indicator.
• Automatic sensors explanation of the lighting system.
• Brightness setting for backlight.
• Indication of assistance support.
• Motor output power and output current
indicator.
• Mileage show (including single-trip distance,
total distance and remaining distance).

   USER MANUAL – M625/M325 DRIVE SYSTEM

17• Walk assistance.

3

Maintenance indicator.

• Energy consumption indicator CALORIES

4

Bluetooth indicator.

(Note: If the display has this function).

5

Service: Please see the service section.

• Display for the remaining distance.

6

Support level/ Walking assistance(Depends on your riding style)

7

Time

• Setting password.

8

Power indicator in watts / amperes.

• Bluetooth function. (the display can connect
to the mobile through Bafang Go APP)

9Support level indicator.

10

Default Mode: ECO/SPORT

11

Speed Graphics.

12

Data: Display data, which corresponds to thecurrent mode.

13

Trip: Daily kilometers (TRIP) - Total kilometers(ODO) - Top speed (MAX) - Average speed(AVG) - Range (RANGE) - Energy Consumption (CALORIES(only with torque sensor
fitted)) - Travel time (TIME).

14

Display of battery capacity in real time.

• USB charge port (5V 500mA)• Parameter setting (The default support level,
speed limit, wheel size)

8.4 	 Display Information
2 3 4

5

6

7

1

11

8

12

8.5 	 Key Definition

Up

13

System On/Off
9

10

14

1

The display shows
light is on.

2

USB charging indicator displays the icon , if
an external USB device is connected to thedisplay.

18

this symbol, if the

Down

USER MANUAL – M625/M325 DRIVE SYSTEM  .

display

8.6 	 Normal Operation
8.6.1 Switching the System ON/
OFF
Press and hold(>2S) on the display toturn on the system. Press and hold(>2S)
again to turn off the system.
If the "automatic shutdown time" is set to
5 minutes (it can be set with the "Auto Off"function, See "Auto Off"), the display
will automatically be turned off within thedesired time when it is not in operation.
If the password function is enabled, youmust enter the correct password to use thesystem.

8.6.3 Selection Mode
Briefly press the(0.5s) button to see thedifferent trip modes.
Trip: daily kilometers (TRIP) - total kilometers(ODO) - Maximum speed (MAX) - Average
speed (AVG) - Range (RANGE) - Energy
consumption (CALORIES (only with torquesensor fitted)) - Travel time (TIME).

When turn on the system, you can see thedisclaimer, and you can pressortoselect the consent or not prompt at nexttime and press
to confirm.

8.6.2 Selection of Support Levels
When the display is turned on, press theor(<0.5S) button to switch to the support level, the lowest level is 0, the highest
level is 5. When the system is switched on,
the support level starts in level 1. There is no
support at level 0.

   USER MANUAL – M625/M325 DRIVE SYSTEM

8.6.4 Headlights / backlighting
Hold the(>2S) button to activate theheadlight and taillights.
Hold the(>2S) button again to turnoff the headlight. The brightness of thebacklight can be set in the display settings"Brightness". If the display / Pedelec isswitched on in a dark environment, thedisplay backlight/headlight will automaticallybe switched on. If the display backlight/
headlight has been manually switched off,
the automatic sensor function is deactivated.
You can only turn on the light manually,
after switching on the system again.

19

8.6.6 SERVICE
The display shows "Service" as soon as a certain number of kilometers or battery charges
has been reached. With a mileage of morethan 5000 km (or 100 charge cycles), the“Service" function is displayed on the display. Every 5000 km the display "SERVICE"
is displayed every time. This function can be
set in the display settings.

8.6.5 Walk Assistance
The Walk assistance can only be activatedwith a standing pedelec.
Activation: Press the
button until thissymbolappears. Next hold down the
button whilst thesymbol is displayed.
Now the Walk assistance will activate. The
symbolwill flashes and the pedelec
moves approx. 6 km/h. After releasing the
button, the motor stops automaticallyand switches back to level 0.

20

USER MANUAL – M625/M325 DRIVE SYSTEM  

display

8.7 	 Setting
After the display is turned on, press andhold theand(>1S) button, to accessthe “SETTING” menu. By pressing theor(<0.5S) button, you can select: Display
Setting, Information or EXIT. Then press the(<0.5S) button to confirm your selected
option.

8.7.1 “Display Setting”
Press theor(<0.5S) button to select“Display Setting”, and then briefly press the(<0.5S) button to access the following
selections.

Or select "EXIT" and press the(<0.5S)
button to return to the main menu, or select"BACK" and the(<0.5S) button to returnto the Settings interface.
If no button is pressed within 20 seconds,
the display will automatically return to themain screen and no data will be saved.

8.7.1.1 “Unit” Selections in km/Miles
Press theor(<0.5S) button to highlight “Unit” in the display settings menu, andthen press the(<0.5S) button to select.
Then with theorbutton choose
between “Metric” (kilometer) or “Imperial”(Miles). Once you have chosen your desired
selection, press the(<0.5S) button
to save and exit to the "Display Setting"interface.

You can press and hold theand(>1S) button at any time, to return to themain screen.

   USER MANUAL – M625/M325 DRIVE SYSTEM

21

8.7.1.2 “Service” Switching the notification
on and off
Press theor(<0.5S) button to highlight “Service” in the display settings menu,
and then press(<0.5S) to select. Thenwith theorbutton choose between“ON” or “OFF”. Once you have chosen yourdesired selection, press the(<0.5S) button to save and exit to the "Display Setting"interface.
8.7.1.3 “Brightness” Display brightness
Press theor(<0.5S) button tohighlight “Brightness” in the display settings
menu. Then press(<0.5S) to select. Thenwith theorbutton choose between"100%" / "75%" / "50%" /" 30%"/"10%" .
Once you have chosen your desired selection, press the(<0.5S) button to saveand exit to the "Display Setting" interface.
8.7.1.4 “Auto Off” Set Automatic systemswitch off time
Press theor(<0.5S) button to highlight “Auto Off” in the display settings menu,
and then press(<0.5S) to select. Thenwith theorbutton choose between“OFF”, "9"/"8"/"7"/"6"/"5"/"4"/"3" /"2"/"1",(The numbers are measured in minutes).
Once you have chosen your desired selection, press the(<0.5S) button to saveand exit to the "Display Setting" interface.
8.7.1.5 “Default Mode”
Press theor(<0.5S) button to highlight “Default Mode” in the display settings
menu, and then press(<0.5S) to select.
Then with theorbutton choose
between “ECO/SPORT”. Once you havechosen your desired selection, press the(<0.5S) button to save and exit to the"Display Setting"22

8.7.1.6 “Power View” Setting the power
indicator
Press theor(<0.5S) button to highlight “Power View” in the display settings
menu, and then press(<0.5S) to select.
Then with theorbutton choose
between “Power” or “Current”. Once you
have chosen your desired selection, press
the(<0.5S) button to save and exit tothe "Display Setting" interface.

8.7.1.7 “SOC View” Battery view in volt
percent
Press theor(<0.5S) button tohighlight “SOC View” in the display settings
menu, and then press(<0.5S) to select.
Then with theorbutton choose
between “percent” or “voltage “. Once you
have chosen your desired selection, press
the(<0.5S) button to save and exit tothe "Display Setting"
USER MANUAL – M625/M325 DRIVE SYSTEM  

display

8.7.1.10 “Password”
Press theor(<0.5S) button to choose“Password” in the menu. Then by briefly
pressing(<0.5S) to enter the password
selection. Now again with theor(<0.5S) buttons highlight “Start Password"
and press the(<0.5S) button to confirm.
Now again using theor(<0.5S)
Button choose between “ON” or “OFF” andpress the(<0.5S) button to confirm.
8.7.1.8 “TRIP Reset” Reset mileage
Press theor(<0.5S) button tohighlight “TRIP Reset” in the display settings
menu, and then press(<0.5S) to select.
Then with theorbutton choose
between “YES” or “NO”. Once you havechosen your desired selection, press the(<0.5S) button to save and exit to the"Display Setting".

Now you can input your 4-digit pin code. By
using theor(<0.5S) button choose
numbers between "0-9". By briefly pressing
the(<0.5S) button you can move on to
the next number.
After entering your desired 4-digit code,
you must re-enter the 4-digits you chose, toensure the code is correct.
After selecting a password, the next time
you turn on the system it will ask you to
input your password. Press theor(<0.5S) button to select the numbers, Then(<0.5S) to confirm.
press briefly
After entering the wrong number threetimes, the system switches off. If you haveforgotten the password, please contact yourretailer.

8.7.1.9 “AL Sensitivity” Automatic headlightsensitivity
Press theor(<0.5S) button to highlight “AL-Sensetivity” in the display settings
menu, and then press(<0.5S) to select.
Then with theorbutton choose between "0"/"1"/"2"/"3"/"4"/"5"/ "OFF”. Onceyou have chosen your desired selection ,press the(<0.5S) button to save and exit
to the "Display Setting".
   USER MANUAL – M625/M325 DRIVE SYSTEM

Changing the password:
Press theor(<0.5S) button to choose“Password” in the menu. Then by briefly
pressing(<0.5S) to enter the password
section. Now again with theor23(<0.5S) button highlight “Reset Password"
and with the(<0.5S) button to confirm.
By entering your old password once, followed by inputting the new password twice,then your password will be changed.

8.7.1.12 “Vibration”
Press theor(<0.5S) Button tohighlight “Vibration” in the display settings
menu. Then briefly press the(<0.5S)
button to confirm selection. Then press theor(<0.5S) button to choose between“ON” and “OFF”. After entering the correcttime, press the(<0.5S) button to confirm
and save.
8.7.1.13 “Wheel size”/ “Circumference” /“Speed limit”

Deactivating the password:
To deactivate the password, use theorbuttons to select “Password” and press
the(<0.5S) button to highlight yourselection. Press theor(<0.5S) button
until is shows “OFF”. Then press briefly(<0.5S) to select.
Now enter your password, to deactivate it.

8.7.1.11 “Set Clock”
Press theor(<0.5S) Button tohighlight “Set Clock” in the display settings
menu. Then briefly press the(<0.5S)
button to confirm selection. Now press
theor(<0.5S) button and input thecorrect number (time) and press the(<0.5S) button to move to the next number.
After entering the correct time, press the(<0.5S) button to confirm and save.

24

Press theor(<0.5S) Button tohighlight “Wheel size”/ “Circumference” /“Speed limit” in the display settings menu.
Then briefly press the(<0.5S) button toconfirm selection. Then press theor(<0.5S) button to change the settings. Thenpress the(<0.5S) button to confirm andsave.

Please accept the disclaimer andcomply with local regulations beforechanging any parameters.

USER MANUAL – M625/M325 DRIVE SYSTEM  

display

8.7.2 “Information”
Once the system is turned on, press andhold theand(>1S) button to accessthe "SETTING" menu. Now by pressing theor(<0.5S) button, Highlight the "Information" and press the(<0.5S) button
confirm your selection.

8.7.2.1 Battery Information
Press theor(<0.5S) button to accessthe "Battery Info" menu, and then press the(<0.5S) button to select confirm. Now
press theor(<0.5S) button and select"Back” or “Next Page". Then press the(<0.5S) button to confirm, now you can readthe battery information.

Content

Explanation

Temp

Current temperature indegrees (°C)

Totalvolt

Voltage (V)Current

Discharge (A)Res Cap

Remaining Capacity(A/h)

Full Cap

Total Capacity (A/h)

RelChargeState

Default Loader Status(%)

AbsChargeState

Instant charge (%)

Cycle Times

Charging cycles(number)

Max Uncharge Time

Maximum time inwhich no charge wasmade (Hr)

Last Uncharge Time
Total Cell

Number (individual)

Cell Voltage 1

Cell Voltage 1 (m/V)

Cell Voltage 2

Cell Voltage 2 (m/V)

Cell Voltage n

Cell Voltage n (m/V)

HW

Hardware Version

SW

Software Version

NOTE: If no data is detected, "--" is displayed.
8.7.2.2 Controller Information
Press theor(<0.5S) button and select"CTRL Info", and then press the(<0.5S)
button to confirm. Now you can read thecontroller information. To Exit press the(<0.5S) button, or select “Back” to return to
the “Information” interface.

   USER MANUAL – M625/M325 DRIVE SYSTEM

25

8.7.2.5 Error CodePress theor(<0.5S) button and select“Error Code”, and then press the(<0.5S)
button to confirm. It shows error information for the last ten errors of the pedelec.
Error code "00"means that there is no error.
To Exit press the(<0.5S) button, or
select “Back” to return to the “Information”
interface.
8.7.2.3 Display Information
Press theor(<0.5S) button and select"Display Info", then press the(<0.5S)
button to read the software and hardware
data in the display. To Exit press the(<0.5S) button, or select “Back” to return to
the “Information” interface.

8.7.2.6 Warning Code

8.7.2.4 Torque Information
Press theor(<0.5S) button and select“Torque info”, then press the (<0.5S)
button to read the software and hardware
data in the display. To Exit press the(<0.5S) button, or select “Back” to return to
the “Information” interface.

26

Press theor(<0.5S) button andselect “Warning Code”, and then press the(<0.5S) button to confirm. It shows
information for the last ten warning of thepedelec. "W-code 0" means that the latest
warning. "00"means that there is no warning. To Exit press the(<0.5S) button, or
select “Back” to return to the “Information”
interface.

USER MANUAL – M625/M325 DRIVE SYSTEM  

display

8.8 	 Error Code Definition
The display can show the errors of a pedelec. If an error is detected, the wrench icon
appears on the display and one of the following error codes will be displayed.
Note: Please read the description of the error code carefully. If you see the error code, restart thesystem first. If the problem is not resolved, please contact your dealer.

Error

Declaration

Troubleshooting

04

The throttle is not back in its correct position.

Check the throttle can adjust back into its correct
position, if the situation does not improve, pleasechange to a new throttle.(only with this function)
1. Check the connector of throttle whether they arecorrectly connected.

05

The throttle has fault.

2. Disconnect the throttle, If the problem still occurs,
please contact your retailer.
(only with this function)
1. Remove the battery.

07

Overvoltage protection

2. Re-Insert the battery.
3. If the problem persists, please contact your retailer.

08

Error with the hall sensor signal
inside the motor

Please contact your retailer.

09

Error with the Engine phase’s

Please contact your retailer.

10

The temperature inside the engine
has reached its maximum protection value

1. Turn off the system and allow the Pedelec to cooldown.
2. If the problem persists, please contact your retailer.

11

The temperature sensor inside themotor has an error

Please contact your retailer.

12Error with the current sensor in thecontroller

Please contact your retailer.

13

Error with the temperature sensor
inside of the battery

Please contact your retailer.

14

The protection temperature inside
the controller has reached its maximum protection value

1. Turn off the system and let the pedelec cool down.
2. If the problem persists, please contact your retailer.

   USER MANUAL – M625/M325 DRIVE SYSTEM

27

Error

Declaration

Troubleshooting

15

Error with the temperature sensor
inside the controller

Please contact your retailer.
1. Restart the system

21

Speed sensor Error

2. Check that the magnet attached to the spoke isaligned with the speed sensor and that the distanceis around 5 mm.
3. Check that the speed sensor connector is connected correctly.
4. If the error persists, please contact your retailer.

25

Torque signal Error

26

Speed signal of the torque sensor
has an error

1. Check that all connections are connected correctly.
2. If the error persists, please contact your retailer.
1.Check the connector from the speed sensor to
make sure it is connected correctly.
2.Check the speed sensor for signs of damage.
3.If the problem persists, please contact your retailer.

27

Overcurrent from controller

30Communication problem

33

28

Brake signal has an error

Please contact your retailer.
1. Check all connections are correctly connected.
2. If the error persists, please contact your retailer.
1. Check all connectors.

(If brake sensors are fitted)

2. If the error continues to occur, please contact yourretailer.

35

Detection circuit for 15V has anerror

Please contact your retailer.

36

Detection circuit on the keypad has
an error

Please contact your retailer.

37

WDT circuit is faulty

Please contact your retailer.

41

Total voltage from the battery is
too high

Please contact your retailer.

42

Total voltage from the battery is
too low

Please contact your retailer.

USER MANUAL – M625/M325 DRIVE SYSTEM  

display

Error

Declaration

Troubleshooting

43

Total power from the battery cells
is too highPlease contact your retailer.

44

Voltage of the single cell is too highPlease contact your retailer.

45

Temperature from the battery is
too high

Please contact your retailer.

46

The temperature of the battery is
too low

Please contact your retailer.

47

SOC of the battery is too highPlease contact your retailer.

48

SOC of the battery is too low

Please contact your retailer.

51

The display is not compatible withyour DIY system.

Please contact your retailer to purchase the compatible displays.

52

The controller is not compatible
with your DIY system.

Please contact your retailer to purchase the compatible drive units.

53

The battery is not compatible withyour DIY system.

Please contact your retailer to purchase the compatible batteries.

54

The battery and controller are notcompatible with your DIY system.

Please contact your retailer to purchase the compatible batteries and drive units.

55

The battery and display are notcompatible with your DIY system.

Please contact your retailer to purchase the compatible batteries and displays.

56

The controller and display are notcompatible with your DIY system.

Please contact your retailer to purchase the compatible drive units and displays.

61

Switching detection defectPlease contact your retailer. (only with this function)

62

Electronic derailleur cannot release.

Please contact your retailer. (only with this function)

71

Electronic lock is jammed

Please contact your retailer. (only with this function)

81

Bluetooth module has an error

Please contact your retailer. (only with this function)   USER MANUAL – M625/M325 DRIVE SYSTEM

29

9 BATTERY
9.1 	 Introductions
9.1.1 Battery
Your pedelec can be equipped with batteries ofdifferent capacities which are compatible withyour DIY system.

(Depending on the manufacturer's configuration)
Model numbers:
BT F22.960.C

9.1.1.1 Safety instructions
It is possible for the battery to cause a fire,
explosion or hazard if the battery is connected
to an incompatible system. Do not open,
disassemble or pierce the battery as this canlead to short circuits, leaks, fires or explosions. If
the battery falls to the ground, or exposed to a
blow or similar event, do not continue to use
the battery, take it to your retailer to examine.
Use only the original charger supplied with thebattery, otherwise it can lead to an explosion or
permanent damage. The disposal of usedbatteries must be carried out at a suitabledisposal point.
The battery should always be kept out ofreach of children. The use of the charger
or the battery is not suitable for children.

Before use, read the information on the label ofthe battery.

Please only use the original BAFANG charger tocharge the battery. The battery is not fully
charged when it is delivered. Please charge thebattery completely before its first use and before
storage.

• It is recommended to charge the battery
after use. Deep discharge is harmful to thebattery. Never fully discharge the battery.
If the battery remains uncharged for an
extended period, this will damage thecapacity of the battery. For storage, therecommended capacity of the battery should
be between (60-80%).
• Do not charge the battery longer than the
charging time specified in the "SPECIFICATION" table.
30

Do not touch a leaking battery.
Leaking electrolytes can seep into the skin andcause discomfort. If battery acid encounters theeyes, do not rub it! Immediately wash your eyes
carefully with clean water and consult a doctor
or a hospital.
A faulty battery can lead to overheating,smoking or burning.
When the battery gets hot keep yourself andothers a safe distance away from the battery. In
case of damage or heat, you should avoid
touching the battery. See chapter ("Environmental tips").
Do not disassemble the battery.
The battery contains protective components toavoid danger. Incorrect handling, such as
improper disassembly, can destroy the protectivefunctions and lead to overheating, smoke andexplosion.
Do not intentionally short-circuit thebattery.
Never allow the plus and minus connectors tocome into contact with each other. Do notallow the battery to come into contact with

USER MANUAL – M625/M325 DRIVE SYSTEM  

Batterymetal objects. It is dangerous if the battery is
short-circuited. As it can lead to overheating,smoke, explosion or burning.
Do not heat or burn the battery.
An overheated or ignited battery can cause
battery cells to explode.
Do not place the battery under direct
sunlight for long time.
Do not use the battery near heat sources.
Do not use the battery near an open flame or attemperatures above 60 °C. High temperatures
can cause the battery to burn or explode.
Do not charge the battery near open fireor in direct sunlight.
This can cause errors or internal problems inside
the battery, also damaging the protectivefunction. It can lead to abnormal chemical
reactions or malfunctions that lead tooverheating, smoke and explosion.
Do not damage the battery.
The battery must not be dropped or damaged.
This can lead to overheating, smoke andexplosion. Never submerge the battery in water.
Do not charge the battery directly fromthe socket or a cigarette lighter in the car.
High voltage and excessive current will damage
the battery and reduce its lifespan. It can lead tooverheating, smoke and explosion.

9.1.1.2 Battery Storage
If you do not use your pedelec for a long time,
remove the battery, and charge about (60-80%)
on. Store the battery separately in a suitable dry
place.

• Avoid direct sunlight from the sun, as it may
cause it to overhead, and cause internal
problems in the battery. It can lead to abnormal chemical reactions or malfunctions thatlead to overheating, smoke and explosion.

   USER MANUAL – M625/M325 DRIVE SYSTEM• To prevent a deep discharge, the battery is
put into sleep mode after a certain time.
• Do not extend the battery to temperatures
below the permissible storage temperatureof -10 °C to 35 °C. Note that temperaturesof about 45 °C are common near heaters,in direct sunlight or in overheated vehicle
interiors.
Do not continue to use the battery if you noticethat it gets hot during operation, charging or
storage, develops a strong smell, changes its
appearance, or is otherwise unusual. Do notcontinue to use the battery and have it checked
by a retailer before using it again.

9.1.1.3 Battery wear
The battery can be charged 600 times. The
battery capacity decreases during this time, thus
reducing the range of the pedelec. If the range
is not enough depending on the capacity of thebattery may need to be replaced.

9.1.1.4 Pedelec riding distance
It is best to charge the battery at room
temperatures and insert the battery just before
the start of the journey. The discharge cycle ofthe battery can be affected by:• Used pedal power• Total weight (load and driver)• Tire air pressure• Headwind• Ambient temperature• Road/underground condition• selected speed level• Slope• Battery charge level• Age• Remaining capacity of the battery

31

9.1.2 Charger
The charger is specially designed for charging
lithium-ion batteries. It is equipped with an
integrated fuse and overcharging protection.

• Avoid direct sunlight.
• Disconnect the charger from the power supply
when not in use.

• Use only the original Bafang charger that camewith your pedelec.

• Do not cover the charger while in use. There is thepossibility of short circuits or fires.

• When cleaning the charger, unplug it from thepower outlet first.

• Stop the Charge process if the charging cycle lasts
longer than the length listed in the Specifications
table.

9.2 	 Operation
9.1.2.1 Battery charger Instructions
Read the instructions on the external label ofyour charger before using the battery.

9.2.1 Installing Your Battery
When pushing the battery into position. Make
sure that the battery has clicked into the locking
mechanism before you set off.

First rotate the lock to the open position, then insert the battery into the sliderail, and push the battery into the downbracket. Finally rotate the key and lock thebattery.

To prevent the risk of electric shock, you should
never open the charger. Maintenance work
should be dealt with by qualified service
personnel. Be sure to read the information
about your charger before use! Unplug thepower plug before connecting the battery to thecharger or removing it from the charger.
Keep the charger away from children andanimals. In the event of malfunction or damage,it may result in a fire or electric shock.

• The charger must not be operated by children or
people with limited sensory or mental disabilities.

• Do not use your charger if it is moist or dusty.

32

NOTE: The key can only be removed after
the battery is locked, otherwise it can not
be removed.

USER MANUAL – M625/M325 DRIVE SYSTEM  

Battery

9.2.2 Removing the Battery
First rotate the lock to the open position,then pull the battery up along the slide railon the down bracket. Finally remove thebattery from slide rail.

9.2.4 Charging the Battery
Use only the original battery charger supplied toyou, as there is a risk of fire or explosion if theincorrect charger is used.
You can charge your battery when mounted on
the bike or when it is removed.
Lithium-ion batteries are not subject to any
memory effect. You can recharge your battery
at any time, even after short journeys.

Charge the battery at temperatures between 0°C
and 45°C (ideally at room temperature approx.
20 °C). Give your battery enough time to reachthis temperature before charging.
Before charging, read the instructions on the
charger.

Hold the battery tightly as it is heavy.

9.2.3 Removing the Battery Lock
NOTE: If the lock is damaged or the key islost, please contact the after-sales service.

1. First insert the plug of charger into thepower socket, then the Logo LED will blinkin blue.
blueFirst unscrew six screws on the battery,remove the cover and take out the lockfrom battery.
2. As soon as the charger is connected to thebattery, the Logo LED will turn to light inblue (3 sec.), then turn to long light in red,it start to charge.

red   USER MANUAL – M625/M325 DRIVE SYSTEM

33

3. When charging is complete, the logo LEDchanges from red to blue.

blue

4. If the logo LED flashes in red during thecharging, it indicates that the charging isabnormal.
The charging time depends on several factors. It
can vary greatly depending on the temperature,age, use and capacity of the battery. For
information on the charging time of yourbattery, see "SPECIFICATION"

When the battery is fully charged, the charging
process stops automatically. Unplug the connector from the battery and then removed from themains.
9.2.4.1 Safety instructions
Use only the battery charger.

Make sure you are using the correct mains
voltage. The required mains voltage is indicatedon the charger.

34• Do not touch the power plug with wet
hands. There is a risk of electric shock.
• Note: A sudden rise in temperature cancause condensation in the battery. To avoid
condensation, charge the battery at thesame place where it is stored.
• Before using, check that the charger, cableand plug are not damaged. Do not use thecharger, if you notice any damage. There isa risk of electric shock.
• Charge the battery only in a well-ventilatedroom.
• Do not cover the charger/battery during
charging. There is a risk of overheating, fireor explosion.
• Charge the battery in a dry place, and on a
non-flammable surface.
The battery must be charged at least once every
3 months to avoid damage or destruction of thecells.
If the charging process takes longer than usual,the battery may be damaged. In this case, stop
charging immediately. Have the battery andcharger checked by your retailer to prevent
further damage.

USER MANUAL – M625/M325 DRIVE SYSTEM  

BatteryErrors - Causes and Solutions
Description

Cause

Solution

The operating display does notlight up.

Power plug is not correctly connected to thepower supply

Check that all connectors on the
charger are correctly connected tothe power supply.

The charging indicator is not lit.

The battery may be malfunctioning.

Contact your retailer.

The charging indicator does notglow permanently red.

The battery may be malfunctioning.

Contact your retailer.

9.2.5 LED Display for Charging
Status and Charging
capacity
The battery must be activated before it can be
used.

9.2.5.1 LED indication
When the battery is activated, press the button““ (for 1 second) and the LED displays thecurrent power level, if the first LED flickers, itmeans that the battery needs to charge. See thetable below:

Charge status indication

When the battery is activated, long press the
button“ “ (> 10 seconds), and the LED will belight up one by one. After releasing the button,
the battery will enter a deep sleep state.
In the deep sleep state, press the button “ “(3 to 5 seconds) to activate the battery and the
LED will all light up the LED for 3 seconds.
To avoid the battery discharge from becoming
damaged, the battery management system puts
the battery into sleep mode. In sleep mode, nofunction is given for technical reasons.

   USER MANUAL – M625/M325 DRIVE SYSTEM

LED

LED stateFirst LED
blinksOne LEDlight turns
green
2 LED lights
turn green

SOC≤  5 %
5 – 20 %20 – 40%

3 LED lights
turn green

40 – 60 %4 LED lights
turn green

60 – 80 %5 LED lights
turn green≥ 80 %

35

9.3 	 Specifications
9.3.1 Battery
Primary Settings

BT F22.960.C

Rated voltage

50.4 DCV

Nominal Capacity

19.6 Ah

Rate Capacity

19 Ah (@1C/25°C Discharge)

Power

960 WhCharging time

6.5h with 4A Charger

Storage (At 35% SOC &-10° ~ 35 °C)

6 months

Riding Distance *Minimum 80km( 1000W motor)

Dimensions (L * W * H)

375*100*149mm

Weight5.5 ± 0.5 KG

Charger

Special 5P charger* Ideal conditions: Flat terrain, approx. 15km/h average speed, no headwind, approx. 20 °C ambient temperature, high-quality bike components, tire tread and pressure with minimal rolling resistance, experienced eBike rider(always shifts gears correctly), additional weight(excluding bike weight)<70kg.

9.3.2 Charger• Operating voltage: 100 ACV–240 ACV,
50 – 60 Hz• Rated output voltage: 58.8 V• Output current: 4 A ± 0.2 A• Minimum battery charge voltage: 37.8 ± 2 V• Timing Protection: 15 ± 1 h• Temperature protection: NTC < 0 ± 3 °C
or NTC > 65 ± 3 °C
• AC Connector: Meet local standard• Certificate: FCC, UL62368, RoHs

36

USER MANUAL – M625/M325 DRIVE SYSTEM