Serfas DASH Plus 500W Manual (2022)

OWNER’S MANUAL

DASH PLUS 500W MID-DRIVE E-BIKE

www.serfas.com

Don’t Forget To Register Your Bike!

SERFAS DASH PLUS 500W MID-DRIVE

OWNER’S MANUAL

Thank you for purchasing a Serfas Dash Plus 500W e-bike! Before riding, please take a

moment to review these instructions.

Need service or support? Visit our website for quick answers, manuals, and/or give us

a call and we’ll find you a solution.

Serfas, Inc

2333 W Utopia Rd

Phoenix, AZ 85027

Phone: 1-(800) 424-0047

Email: [email protected]

CONTENTS

Display / Control Specifications

Getting Started

Normal Operation

What’s On The Display

Settings

Headlights / Backlighting

ECO / Sport Modes

Walk Assistance

Service

Switching System On/Off

Support Levels

Selection Mode

Display Setting

Units (km/Miles)

Service Tip

Display Brightness

Auto Off

Max Pas

Default Mode

Power View

SOC View

Trip Reset

AL Sensitivity

Password

Changing Password

Deactivating Password

Set Clock

Information

Wheel Size and Speed Limit

Battery Information

Controller Information

Display Information

Torque Information

Error Code

Battery and Charging

Maintenance and Service

Storing Your Bike

Safety

Error Codes and Troubleshooting

Additional Troubleshooting

Battery Troubleshooting

Frequently Asked Questions (FAQ)

Warranty and Registration

DISPLAY / CONTROL SPECIFICATIONS

• 48 Volt Power Supply (500W)

• Current Rated: 10mA

• Maximum Operating Current: 30mA

• Power O Leakage Current < 1uA

• Operating Current to Controller: 50mA

• Operating Temperature: -20º to 45ºC

• Storage Temperature: -20º to 50ºC

• Waterproof Rating: IP65

• Bearing Humidity: 30% - 70% RH

Figure 2

SERFAS E-BIKE

Figure 1

POWER SWITCH

____

Figure 3

CHARGING PORT

CONTROL & DISPLAY

Model: DP C18.CAN BUS

___

Light On/O

OK/Enter

System

On/O

Down

GETTING STARTED

SERFAS E-BIKE OWNER’S MANUAL

The Dash Plus 500W is operated using the control pad on the

handlebars. The control pad is located near the left-hand brake lever.

Push the power button on the battery to turn on. The current charge

level will temporarily display on the LEDs (4=full, 1=near empty), then

one green LED to show the battery is turned on. Press and hold the

button, 2 seconds, on the handlebar controls to turn system on. Display

should light up. Now, your e-bike is ready to ride. To turn o, press and

hold for 2 seconds. The battery will automatically turn o. Automat-

ic system shutdown time is set to 5 minutes by default.

The Dash Plus 500W bike oers pedal assist. When using pedal assist,

an electric motor supplements the rider’s own eort. To use the pedal

assist, simply start pedaling, then push the button to increase

assist or button to decrease pedal assist. 0 = lowest, 5 = highest.

Pedal assist will engage at speeds up to 28 MPH.

The Dash Plus 500W e-bike is equipped with a throttle, which is

mounted near the rider’s left thumb, to propel the bike without

pedaling. To use the throttle, start pedaling (one pedal revolution)

then push down on the throttle while pedaling. Once the bike is

moving on throttle power, you can stop pedaling entirely and use

your thumb to control the speed of the bike. The throttle can propel

you at speeds up to 20 MPH.

THE MOTOR STOPS WHEN YOU:

1) Stop pedaling 2) Squeeze the brake levers 3) Release the throttle.

Simply begin pedaling again to re-engage the motor.

NORMAL OPERATION

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7.7 NORMAL OPERATION

7.7.1 Switching the System ON/OFF

Press and hold (>2S) on the display to turn 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 the desired time when it is not in op-

eration. If the password function is enabled, you must enter the correct password to use the system.

7.7.2 Selection of Support Levels

When the display is turned on, press the or (<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.

7.7.3 Selection Mode

Brieﬂy press the (0.5s) button to see the different trip modes.

Trip: daily kilometers (TRIP) - total kilometers (ODO) - Maximum speed (MAX) - Average speed (AVG) -

Range (RANGE) - Energy consumption (CALORIES(only with torque sensor ﬁtted)) - Travel time (TIME).

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7.7.4 Headlights / backlighting

Hold the (>2S) button to activate the headlight and taillights.

Hold the (>2S) button again to turn off the headlight. The brightness of the backlight can be set

in the display settings "Brightness". If the display /Pedelec is switched on in a dark environment,

the display backlight/headlight will automatically be 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.

7.7.5 ECO/SPORT Modus

Press and hold the (<2S) Button, to change from ECO mode to Sport mode.

(Depending on the version of the pedelec manufacturer)

The Dash Plus 500W is operated using the control pad on the

handlebars. The control pad is located near the left-hand brake lever.

First, push the power button on the battery to turn on (Fig.1) The

current charge level will be temporarily displayed on the LEDs (4=full,

1=near empty), then one green LED to show the battery is turned on.

Next, press and hold the button on the handlebar controls to turn

on the display (Fig. 2) Display should light up. Now, your e-bike is ready

to ride. To turn o, press and hold for 3 seconds. The battery will

automatically turn o.

The Dash Plus 500W bike oers pedal assist. When using pedal assist,

an electric motor supplements the rider’s own eort. To use the pedal

assist, simply start pedaling, then push the arrow to increase assist

or arrow to decrease pedal assist (Fig.2). 0 is the lowest 5 is the

maximum. Pedal assist will engage at speeds up to 28 MPH.

The Dash Plus 500W e-bike is equipped with a throttle, which is

mounted near the rider’s left thumb, to propel the bike without

pedaling. To use the throttle, start pedaling (one pedal revolution)

then push down on the throttle while pedaling. Once the bike is

moving on throttle power, you can stop pedaling entirely and use

your thumb to control the speed of the bike. The throttle can propel

you at speeds up to 20 MPH.

THE MOTOR STOPS WHEN YOU:

1) Stop pedaling 2) Squeeze the brake levers 3) Release the throttle.

Simply begin pedaling again to re-engage the motor.

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7.7.4 Headlights / backlighting

Hold the (>2S) button to activate the headlight and taillights.

Hold the

(>2S) button again to turn off the headlight. The brightness of the backlight can be set

in the display settings "Brightness". If the display /Pedelec is switched on in a dark environment,

the display backlight/headlight will automatically be 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.

7.7.5 ECO/SPORT Modus

Press and hold the (<2S) Button, to change from ECO mode to Sport mode.

(Depending on the version of the pedelec manufacturer)

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7.7.6 Walk Assistance

The Walk assistance can only be activated with a standing pedelec.

Activation: Press the

button until this symbol appears. Next hold down the button whilst

the symbol is displayed. Now the Walk assistance will activate. The symbol will ﬂashes and

the pedelec moves approx. 6 km/h. After releasing the button, the motor stops automatically and

switches back to level 0.

7.7.7 SERVICE

The display shows "Service" as soon as a certain number of kilometers or battery charges has been

reached. With a mileage of more than 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.

SERFAS E-BIKE OWNER’S MANUAL

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7.7.6 Walk Assistance

The Walk assistance can only be activated with a standing pedelec.

Activation: Press the

button until this symbol appears. Next hold down the

button whilst

the symbol is displayed. Now the Walk assistance will activate. The symbol

will ﬂashes and

the pedelec moves approx. 6 km/h. After releasing the

button, the motor stops automatically and

switches back to level 0.

7.7.7 SERVICE

The display shows "Service" as soon as a certain number of kilometers or battery charges has been

reached. With a mileage of more than 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.

SERFAS E-BIKE OWNER’S MANUAL

WHAT’S ON THE DISPLAY

IMPORTANT NOTICE

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Time

USB charging indicator displays the icon

if an external USB device is connected to

the display.

The display shows this symbol, if the

light is on.

Speed Graphics

Trip: Daily Kilometers (TRIP) - Total Kilometers

(ODO) - Top Speed (MAX) - Avg. Speed

(AVG) - Range (RANGE) - Energy Cons-

umption (CALORIES(only w/ torque

sensor ﬁtted)) - Travel Time (TIME)

Real time battery capacity.

Voltage indicator in Voltage or %

Digital Speed Display

Power indicator in Watts / Amperes

Support Level / Walking Assistance

Data: Display data, which corresponds

to the current mode.

Service: Please see the service section

If the error information from the display

cannot be corrected according to the

instructions, please contact your reseller.

Do not clean the display with a stream jet,

high-pressure cleaner, or water hose.

Do not use thinners or other solvents to clean

the display. Such substances can damage the

surfaces.

Warranty is not included due to wear and normal

use and aging.

The product is designed to be waterproof,

it is highly recommended to avoid submerging

the display under water.

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DEALER MANUAL FOR DISPLAY

7.8 SETTINGS

After the display is turned on, quickly

press the button twice, to access the

“SETTINGS” menu. By pressing the or

(<0.5S) button, you can select: Display

Settings, Information or EXIT. Then press the

(<0.5S) button to conﬁrm your selected

option.

Or select "EXIT" and press the

(<0.5S)

button to return to the main menu, or select

"BACK" and press the (<0.5S) button to

return to the Settings interface.

If no button is pressed within 20 seconds,

the display will automatically return to the

main screen and no data will be saved.

You can quickly press the (<0.5S)

button twice at any time, to return to the

main screen.

7.8.1 “Display setting”

Press the or (<0.5S) button to select

Display Settings, and then brieﬂy press the

(<0.5S) button to access the following

selections.

7.8.1.1 “Unit” Selections in km/Miles

Press the

or (<0.5S) button to high-

light “Unit” in the Display settings menu,

and then press the (<0.5S) button to

select. Then with the or button

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.

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7.8.1.2 “Service Tip” Switching the

notiﬁcation on and off

Press the

or (<0.5S) button to

highlight “Service tip” in the Display settings

menu, and then press (<0.5S) to select.

Then with the or button choose

between “ON” or “OFF”. Once you have

chosen your desired selection, press the

(<0.5S) button to save and exit to the

"Display setting" interface.

7.8.1.3 “Brightness” Display brightness

Press the

or (<0.5S) button to high-

light “Brightness” in the Display settings

menu. Then press (<0.5S) to select. Then

with the or button choose between

"100%" / "75%" / "50%" /" 30%"/"10%" .

Once you have chosen your desired selec-

tion, press the (<0.5S) button to save and

exit to the "Display setting" interface.

7.8.1.4 “Auto Off” Set Automatic system

switch off time

Press the or (<0.5S) button to

highlight “Auto Off” in the Display settings

menu, and then press (<0.5S) to select.

Then with the or button choose

between “OFF”, "9"/"8"/"7"/"6"/"5"/"4"/"3"

/"2"/"1", (The numbers are measured in

minutes). Once you have chosen your de-

sired selection, press the (<0.5S) button

to save and exit to the "Display setting"

interface.

7.8.1.5 “MAX PAS” Support level

(Function not available with ECO/SPORT display)

Press the or (<0.5S) button to

highlight “Max Pass” in the Display settings

menu, and then press

(<0.5S) to select.

Then with the

or button choose

between “3/5/9” (the amount of support

levels). Once you have chosen your desired

selection, press the (<0.5S) button to

save and exit to the "Display setting"

7.8.1.6 “Default Mode” Set for ECO/Sport

mode

Press the

or (<0.5S) button to high-

light “Default Mode” in the Display settings

menu. Then press (<0.5S) to select. Then

with the or button choose between

“ECO” or “Sport”. Once you have chosen

your desired selection, press the (<0.5S)

button to save and exit to the "Display

setting" interface.

7.8.1.7 “Power View” Setting the power

indicator

Press the

or (<0.5S) button to high-

light “Power View” in the Display settings

menu, and then press (<0.5S) to select.

Then with the or button choose

between “Power” or “Current”. Once you

have chosen your desired selection, press

the (<0.5S) button to save and exit to the

"Display setting" interface.

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7.8.1.8 “SOC View” Battery view in volt

percent

Press the

or (<0.5S) button to

highlight “SOC View” in the Display settings

menu, and then press (<0.5S) to select.

Then with the or button choose

between “percent” or “voltage “. Once you

have chosen your desired selection, press

the (<0.5S) button to save and exit to the

"Display setting"

7.8.1.9 “TRIP Reset” Reset mileage

Press the

or (<0.5S) button to high-

light “TRIP Reset” in the Display settings

menu, and then press (<0.5S) to select.

Then with the or button choose

between “YES” or “NO”. Once you have

chosen your desired selection, press the

(<0.5S) button to save and exit to the

"Display setting"

7.8.1.10 “AL Sensitivity” Automatic

headlight sensitivity

Press the

or (<0.5S) button to high-

light “AL-Sensetivity” in the Display settings

menu, and then press (<0.5S) to select.

Then with the or button choose be-

tween "0" / " 1" / " 2"/ "3" / "4"/ "5"/ "OFF”.

Once you have chosen your desired selection

, press the (<0.5S) button to save and

exit to the "Display setting"

7.8.1.11 “Password”

Press the

or (<0.5S) button to choose

Password in the menu. Then by brieﬂy

pressing (<0.5S) to enter the password

selection. Now again with the or

(<0.5S) buttons highlight “Start Password"

and press the (<0.5S) button to conﬁrm.

Now again using the or (<0.5S)

Button choose between “ON” or “OFF” and

press the (<0.5S) button to conﬁrm.

Now you can input your 4-digit pin code. By

using the

or (<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, to

ensure 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 the

(<0.5S) button to select the numbers, Then

press brieﬂy (<0.5S) to conﬁrm.

After entering the wrong number three

times, the system switches off. If you have

forgotten the password, please contact your

retailer.

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Changing the password:

Press the

or (<0.5S) button to choose Password in the menu. Then by brieﬂy pressing

(<0.5S) to enter the password section. Now again with the or (<0.5S) button highlight “Pass-

word set" and press the (<0.5S) button to conﬁrm. Now with the or (<0.5S) buttons and

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.

Deactivating the password:

To deactivate the password, use the

or buttons to get to the menu point “Password” and

press the (<0.5S) button to highlight your selection. Press the or (<0.5S) button until is

shows “OFF”. Then press brieﬂy (<0.5S) to select.

Now enter your password, to deactivate it.

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DEALER MANUAL FOR DISPLAY

7.8.1.12 “Set Clock”

Press the

or (<0.5S) Button to access

the “Set Clock” menu. Then brieﬂy press the

(<0.5S) button to conﬁrm selection. Now

press the or (<0.5S) button and input

the correct 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.

7.8.2 “Information”

Once the system is turned on, quickly Press the

(<0.5S) button twice to access the "SET-

TINGS" menu. Press or (<0.5S) button

to select "Information", and then press the

(<0.5S) button to conﬁrm your selection.

Or select the point "Back" by conﬁrming with the

(<0.5S) button to return to the main menu.

7.8.2.1 Wheel Size and Speed Limit

The "Wheel Size” and "Speed Limit” cannot

be changed, this information is here to be

viewed only.

7.8.2.2 Battery Information

Press the

or (<0.5S) button to access

the Battery Info menu, and then press the

(<0.5S) button to select conﬁrm. Now

press the or

(<0.5S) button and select

"Back” or “Next Page". Then press the

(<0.5S) button to conﬁrm, now you can read

the battery information.

Content Explanation

TEMP

Current temperature in

degrees (°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 in

which no charge was

made (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.

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7.8.2.3 Controller Information

Press the

or (<0.5S) button and select

"CTRL Info", and then press the (<0.5S)

button to conﬁrm. Now you can read the

controller information. To Exit press the

(<0.5S) button, once “EXIT” is highlighted to

return to the information settings.

7.8.2.4 Display Information

Press the

or (<0.5S) button and select

Display Info, then press the (<0.5S) but-

ton to read the software and hardware data

in the display. To Exit press the (<0.5S)

button, once “EXIT” is highlighted to return

to the information settings.

7.8.2.5 Torque Information

Press the

or (<0.5S) button and select

“Torque info”, then press the (<0.5S) but-

ton to read the software and hardware data

in the display. To Exit press the (<0.5S)

button, once “EXIT” is highlighted to return

to the information settings.

7.8.2.6 Error Code

Press the

or (<0.5S) button and select

“Error Code”, and then press the (<0.5S)

button to conﬁrm. It shows error informa-

tion for the last ten errors of the pedelec.

Error code "00"means that there is no error.

To return to the menu press the (<0.5S)

button, once "BACK" is highlighted to return

to the information settings.

BATTERY AND CHARGING

SERFAS E-BIKE OWNER’S MANUAL

The Dash Plus 500W uses a Lithium-Ion battery which can be charged

on or o the bike. We recommend charging the battery o the bike

indoors, in moderate temperature conditions. To charge the battery,

plug the charger into the charging port and then connect the charger to

a wall outlet (Fig.3). The LED indicator light will be red when charging

and will turn green when charging is complete. When ﬁnished, unplug

the charger from the battery and from the wall outlet.

Take care of the battery to ensure a long service life.

To optimize the performance of the battery over time, try and use it

(discharging and charging) at least monthly. But if you won’t be riding

your Dash Plus 500W for an extended period of time, it’s best to store

the battery fully charged. EVERY 2 MONTHS: Put battery on the

charger to maintain optimum level.

After many charging and discharge cycles, runtime and range will be

reduced. Replacement batteries are available from Serfas to extend the

life of your e-bike. The lifespan of the battery is about 500 charge /

discharge cycles for properly maintained batteries.

When you install the baterry on the Dash Plus 500W, it locks into place

automatically. To unlock for removal, use the supplied key.

DO NOT ride the bicycle if the battery rattles or moves - it should be

ﬁrmly attached.

The Dash Plus 500W battery contains a USB port for transmitting

diagnostic data only, not for charging. It will not charge or power devices

via USB.

• Charge and store the battery indoors if possible. The battery

can be removed from the bicycle for this purpose.

• Avoid extreme hot and cold temperatures.

• DO NOT submerge your bike or any of the components in water.

This action will void the warranty.

MAINTENANCE AND SERVICE

SERFAS E-BIKE

• When cleaning your bike, use a damp cloth and gentle dish soap.

NOTE: DO NOT use a pressure washer or sprayer.

• Periodically apply a light lubricant to moving parts, including the

links of the chain, derailleur pivots, and shifter cable inner wire

where it enters the cable housing.

• If you ride in wet / humid environments, clean and dry electric

connections and apply an anti-corrosive.

• Keep tires inﬂated to their recommend pressure (30-50 PSI /

2.0-3.5 BAR / 200-350 KPA) and check weekly.

• Clean the drivetrain and lubricate the chain (monthly).

All bicycles will need a periodic tune-up or adjustments by a professional.

An annual “check-up” is beneﬁcial. Your bike’s service schedule will

depend on the frequency of its use. In-between expert services at a bike

shop we suggest:

STORING YOUR BIKE

SERFAS E-BIKE OWNER’S MANUAL

From time to time, you may wish to store your bike for an extended

period without riding. Proper storage can help prolong the life of your

e-bike components and battery.

To ready your bike for storage, ﬁrst fully charge the battery. Then

remove the battery from the bike and store it separately. Removing the

battery from the bike puts it into a low-voltage state designed for long

term storage.

Keep both the bike ad the battery in a cool, dry place. Avoid both very

hot and very cold temperatures. Generally if the environment is

comfortable for humans, then it’s a good place to store your bike.

Store your bike away from sources of heat, UV light, and ozone - all of

which can prematurely age rubber tires and tubes.

All bicycle tubes slowly lose air over time and need to be regularly

topped o to maintain proper pressure. This does not mean that your

bicycle has a ﬂat tire. Avoid allowing the tires to deﬂate completely

during storage.

SAFETY

SERFAS E-BIKE

You should wear an approved e-bike bicycle helmet every time you

ride, regardless of legal requirement to do so. Additionally, some

jurisdictions require helmet use when riding Class II and Class III

e-bikes like the Dash Plus 500W.

Your Dash Plus 500W comes with reﬂectors and we encourage you to

use them. Reﬂectors are not a substitute for lights, which are not

included with your e-bike. You should purchase, install, and use front

and rear facing lights when riding in low light or dark conditions.

Some jurisdictions restrict where e-bikes can and cannot be ridden.

These limits may include speciﬁc speeds and motor wattages.

Your Dash Plus 500W is a Class III e-bike, 500 Watts with pedal assist

up to 28 MPH and throttle up to 20 MPH. You should only ride it where

legal and safe.

Some jurisdictions do not allow throttle controlled e-bikes. Your Dash

Plus 500W will still run without the throttle plugged in and removed

from the bicycle.

ERROR CODES AND TROUBLESHOOTING

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DEALER MANUAL FOR DISPLAY

7.9 ERROR CODE DEFINITION

The HMI can show the faults of Pedelec. When a fault is detected, the icon will be indicated and one of the

following error codes will be indicated too.

Note: Please read carefully the description of the error code. When the error code appears, please ﬁrst restart the

system. If the problem is not eliminated, please contact your dealer or technical personnel.

Error Declaration Troubleshooting

The throttle is not back in its

correct position.

Check the connector from the throttle is correctly

connected. If this does not solve the problem, please

change the throttle.

05 The throttle has fault.

1. Check the connector and cable of the throttle are

not damaged and correctly connected.

2. Disconnect and reconnect the throttle, if still no

function please change the throttle.

07 Overvoltage protection

1. Remove and re-insert the battery to see if it

resolves the problem.

2. Using the BESST tool update the controller.

3. Change the battery to resolve the problem.

Error with the hall sensor signal

inside the motor

1. Check all connectors from the motor are correctly

connected.

2. If the problem still occurs, please change the

motor.

09 Error with the Engine phase’s Please change the motor.

The temperature inside the en-

gine has reached its maximum

protection value

1. Turn off the system and allow the Pedelec to cool

down.

2. If the problem still occurs, please change the

motor.

The temperature sensor inside

the motor has an error

Please change the motor.

Error with the current sensor in

the controller

Please change the controller or contact your supplier.

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Error Declaration Troubleshooting

Error with the temperature

sensor inside of the battery

1. Check all connectors from the battery are correctly

connected to the motor.

2. If the problem still occurs, please change the

Battery.

The protection temperature

inside the controller has reached

its maximum protection value

1. Allow the pedelec to cool down and restart the

system.

2. If the problem still occurs, please change the

controller or contact your supplier.

Error with the temperature

sensor inside the controller

1. Allow the pedelec to cool down and restart the

system.

2. If the problem still occurs, Please change the con-

troller or contact your supplier.

21 Speed sensor Error

1. Restart the system

2. Check that the magnet attached to the spoke is

aligned with the speed sensor and that the distance

is between 10 mm and 20 mm.

3. Check that the speed sensor connector is connect-

ed correctly.

4. Connect the pedelec to BESST, to see if there is a

signal from the speed sensor.

5. Using the BESST Tool- update the controller to see

if it resolves the problem.

6. Change the speed sensor to see if this eliminates

the problem. If the problem still occurs, please

change the controller or contact your supplier.

25 Torque signal Error

1. Check that all connections are connected correctly.

2. Please connect the pedelec to the BESST system to

see if torque can be read by the BESST tool.

3. Using the BESST Tool update the controller to see

if it resolves the problem, if not please change the

torque sensor or contact your supplier.

SERFAS E-BIKE OWNER’S MANUAL

BF-DM-C-DP C18-EN November 2019

DEALER MANUAL FOR DISPLAY

Error Declaration Troubleshooting

Speed signal of the torque

sensor has an error

1. Check that all connections are connected correctly.

2. Please connect the pedelec to the BESST system to

see if speed signal can be read by the BESST tool.

3. Change the Display to see if the problem is solved.

4. Using the BESST Tool update the controller to see

if it resolves the problem, if not please change the

torque sensor or contact your supplier.

27 Overcurrent from controller

Using the BESST tool update the controller. If the

problem still occurs, please change the controller or

contact your supplier.

30 Communication problem

1. Check all connections on the pedelec are correctly

connected.

2. Using the BESST Tool run a diagnostics test, to see

if it can pinpoint the problem.

3. Change the display to see if the problem is solved.

4. Change the EB-BUS cable to see if it resolves the

problem.

5. Using the BESST tool, re-update the controller

software. If the problem still occurs please change

the controller or contact your supplier.

Brake signal has an error

(If brake sensors are ﬁtted)

1. Check all connectors are correctly connected on

the brakes.

2. Change the brakes to see if the problem is solved.

If problem continues Please change the controller or

contact your supplier.

Detection circuit for 15V has

an error

Using the BESST tool update the controller to see if

this resolves the problem. If not, please change the

controller or contact your supplier.

Detection circuit on the keypad

has an error

Using the BESST tool update the controller to see if

this resolves the problem. If not, please change the

controller or contact your supplier.

SERFAS E-BIKE OWNER’S MANUAL

BF-DM-C-DP C18-EN November 2019

Error Declaration Troubleshooting

37 WDT circuit is faulty

Using the BESST tool update the controller to see if

this resolves the problem. If not, please change the

controller or contact your supplier.

Total voltage from the battery is

too high

Please change the battery.

Total voltage from the battery is

too low

Please Charge the battery. If the problem still occurs,

please change the battery.

Total power from the battery

cells is too high

Please change the battery.

Voltage of the single cell is too

high

Please change the battery.

Temperature from the battery is

too high

Please let the pedelec cool down.

If problem still occurs, please change the battery.

The temperature of the battery

is too low

Please bring the battery to room temperature. If the

problem still occurs, please change the battery.

47 SOC of the battery is too high Please change the battery.

48 SOC of the battery is too low Please change the battery.

61 Switching detection defect

1. Check the gear shifter is not jammed.

2. Please change the gear shifter.

Electronic derailleur cannot

release.

Please change the derailleur.

71 Electronic lock is jammed

1. Using the BESST tool update the Display to see if it

resolves the problem.

2. Change the display if the problem still occurs,

please change the electronic lock.

81 Bluetooth module has an error

Using the BESST tool, re-update the software onto

the display to see if it resolves the problem.

If not, Please change the display.

ADDITIONAL TROUBLESHOOTING

SERFAS E-BIKE

Having trouble with your Dash Plus 500W? Most problems are easy to

correct.

1. Start by making sure you have a charged battery.

2. If the motor of your bike will not engage, or only engages

intermittently, double check the cable connection where the

motor plugs into the rest of the system. This connector

must be ﬁrmly and fully plugged in to function correctly. If

necessary, loosen the clips holding the cable to the frame to

create additonal slack in the cable, then re-tighten the clips after

you have the motor cable ﬁrmly plugged in.

3. The throttle on the Dash Plus 500W will only engage after the

motor is turned on via pedal assist. This is a safety feature

designed to prevent you from accidentally engaging the throttle

while parking or walking the bike. If you are having diculty with

the throttle, remember to make one revolution of the pedals

ﬁrst, then engage the throttle. You can stop pedaling after the

throttle function turns on.

4. If you bent the derailleur hanger on your Dash Plus 500W in a

fall, don’t worry. It’s actually designed to fail, sparing the more

expensive frame, and is inexpensively replaceable for this reason.

If you need another, they are available on www.serfas.com or at

partner bike shops.

5. If your bike powers up normally and shows no error messages,

but will not run when you turn the pedal assist on, check to

ensure the cadence sensor under the left crankarm is plugged in.

BATTERY TROUBLESHOOTING

SERFAS E-BIKE OWNER’S MANUAL

Your Dash Plus 500W e-bike battery uses several sophisticated

monitoring systems to prevent damage from overcharging, overheat-

ing, deep battery discharge, charging with the wrong voltage, and

other errors.

Please use the speciﬁc charger supplied with your e-bike. Other

chargers may not supply the correct voltage required for charging.

Those that do may not be programmed to initiate the charge cycle. To

resolve this:

If a situation occurs that could damage the battery, the battery can go

into a protective “sleep mode” - the battery cells inside are OK, but the

battery won’t turn on and won’t take a charge. To “wake up” the

battery, please follow this procedure:

continued on next page...

1. Remove battery from the bike.

2. Plug the charging tip into the battery.

3. Plug the charger into wall power.

4. Tap the power button on the battery once to turn it on.

5. Charge the battery overnight.

6. When charging is complete, put the battery back on the bike and

check for proper operation. Having trouble with your Dash Plus

500W? Most problems are easy to correct.

1. Put the battery on the bike.

2. Plug the chaging tip into the battery.

3. Plug the charger into wall power.

4. Tap the power button on the battery once to turn it on.

5. Press and hold “M” on the controls to turn on the display.

6. Allow the battery to charge overnight.

7. Once charged, remove from wall power and check for

proper operation.

Under speciﬁc circumstances you might see one single LED

ﬂashing constantly on the battery. One blinking LED is a warning

of excessive strain on the battery for its charge level. To correct

this issue:

1. Reduce the strain on the battery and charge the battery. If

it will not take a charge, please take the previous steps to

resolve the issue.

SERFAS E-BIKE

FREQUENTLY ASKED QUESTIONS

Do components from the Dash 350/500W and Dash Plus 500W

interchange?

My Dash e-bike is too fast, or exceeds my local speed limit, or

only Class I e-bikes are allowed on my favorite bike path.

On the Dash line of e-bikes, I can’t use the throttle from a

dead stop, only once I’m pedaling. Why?

Some components interchange across the line of Dash e-bikes,

like saddles, seatposts, handlebars, and grips. The ebike

speciﬁc components, however, like batteries, controllers,

displays, and motor do not interchange. Dash 350W is a 36V

system vs 48V of the Dash Plus 500W and these parts are not

compatible.

Dash e-bikes can have the speed limit changed using the

settings in the control panel and can be set as low as 14 MPH

if desired to comply with local laws. Dash e-bikes can also have

the throtlle unplugged and removed (but will continute to run on

pedal assist) if desired in locations where throttle bikes are

not permitted.

This is a safety feature to prevent you from accidentally

engaging the throttle while parking or standing with the bike,

if you forget to turn it o and then hit the throttle accidentally.

You can engage the throttle at any time while you are pedaling.

If you are at a dead stop, you can push the throttle, start

pedaling (about one pedal revolution), then stop pedaling,

and the bike will stay in throttle mode.

•

SERFAS E-BIKE OWNER’S MANUAL

SERFAS E-BIKE

How many times can I recharge my e-bike battery?

Can I put a suspension fork on the Dash e-bike?

Do I have to wear a helmet when riding an e-bike?

Lithium-Ion e-bike batteries use a similar technology to your

laptop or smartphone. They can absorb about 500 charging

cycles before performance degrades. Afterwards, they

can continue to be recharged, however, their capacity will

decrease.

Yes, it is possible to put a suspension fork on the Dash line of

e-bikes. You would need a replacement fork with these specs:

1 1/8” to 1.5” tapered steerer tube, 51mm IS mount for disc

brakes (or a 74mm mount with an add-on adapter to 51mm),

27.5” / 650B wheel size, and the quick release / open type

dropout style. Selecting and installng a suspension fork is

probably a job for a bike shop.

We suggest you do. This depends on your age, and your state.

Please check your local laws.

•

What rear rack ﬁts the Serfas Dash e-bikes?

We recommend to check with your local bike shop.

•

How should I care for my e-bike battery?

Please refer to the Battery and Charging section of

your Dash Plus 500W owner’s manual.

•

SERFAS E-BIKE OWNER’S MANUAL

How can I calculate the capacity of an e-bike battery?

E-bike battery capacity is measured in Watt-Hours, or Wh.

This is the size of the “fuel tank” on the e-bike. Like a car,

some motors guzzle fuel, others sip. To calculate capacity,

multiply the voltage (V) used on the bike by the Ampere-

Hour (Ah) rating.

For the Serfas Dash Plus 500W, for example, multiply 48V

by 11.6Ah = 556.8Wh. More Watt-Hours equals more range

for your e-bike.

•

Why does the remaining battery amount shown on the

LEDs on the battery not match the “Energy Bar” on the

display?

The LEDs on the battery itself shown the remaining

charge left in the battery, but this doesn’t account for how

you are using the bike. The Energy Bar function on the

display is designed to account for the charge on the battery

plus other factors, like speed, throttle usage, and riding

conditions like hills or wind. You’ll see it fall more quickly

under heavy usage, and more slowly when you are not

taxing the motor.

•

What are the weight limits for the Dash Plus 500W?

Max. Rider Weight: 250 lbs / 113.3 kg

Max. Cargo Weight: 50 lbs / 22.6 kg

•

WARRANTY POLICY

SERFAS E-BIKE

The speciﬁc warranty covering your Serfas bicycle is governed

by the law of the state or country in which it was purchased,

and applies only to bicycles purchaed from Authorized Serfas

Retailers.

FRAMES AND FORKS:

Serfas frames made from steel or aluminum (Dash e-bikes) are

warranted by Serfas Bikes, 2333 W. Utopia Rd., Phoenix, AZ

85027 against manufacturing defects in materials and/or

workmanship for the lifetime of the original owner.

COMPONENTS:

All other components, frame ﬁxtures, and ﬁnishes (paint and

decals) are warranted against manufacturing defects in

materials and/or workmanship for a period of one year from the

date of original retail purchase. Forks (other than those made

by Serfas - for example, a Rockshox suspension fork) are not

covered by this limited warranty, but are separately covered by

the stated warranty of their manufacturer. Stripped threads due

to user error are not covered by this warranty.

BF-DM-C-DP C18-EN November 2019

DEALER MANUAL FOR DISPLAY

7.7.4 Headlights / backlighting

Hold the (>2S) button to activate the headlight and taillights.

Hold the

(>2S) button again to turn off the headlight. The brightness of the backlight can be set

in the display settings "Brightness". If the display /Pedelec is switched on in a dark environment,

the display backlight/headlight will automatically be 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.

7.7.5 ECO/SPORT Modus

Press and hold the (<2S) Button, to change from ECO mode to Sport mode.

(Depending on the version of the pedelec manufacturer)

www.serfas.com

BF-DM-C-DP C18-EN November 2019

DEALER MANUAL FOR DISPLAY

7.7.4 Headlights / backlighting

Hold the (>2S) button to activate the headlight and taillights.

Hold the

(>2S) button again to turn off the headlight. The brightness of the backlight can be set

in the display settings "Brightness". If the display /Pedelec is switched on in a dark environment,

the display backlight/headlight will automatically be 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.

7.7.5 ECO/SPORT Modus

Press and hold the (<2S) Button, to change from ECO mode to Sport mode.

(Depending on the version of the pedelec manufacturer)

BF-DM-C-DP C18-EN November 2019

7.7.6 Walk Assistance

The Walk assistance can only be activated with a standing pedelec.

Activation: Press the

button until this symbol appears. Next hold down the button whilst

the symbol is displayed. Now the Walk assistance will activate. The symbol will ﬂashes and

the pedelec moves approx. 6 km/h. After releasing the button, the motor stops automatically and

switches back to level 0.

7.7.7 SERVICE

The display shows "Service" as soon as a certain number of kilometers or battery charges has been

reached. With a mileage of more than 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.