Maintenance And Servicing; Maintenance And Cleaning - Bosch Drive Unit BDU3740 Originalbetriebsanleitung

If you wish to give other users temporary or permanent ac-
cess to your eBike or you want to take your eBike to servi-
cing, you will need to deactivate the <eBike Lock> in
the eBike Flow app in the Settings menu item. If you wish to
sell your eBike, you will also need to delete the eBike from
your user account in the eBike Flow app in the Settings
menu item.
When the eBike system is switched off, the drive unit will
emit a "Lock" sound (i.e. an audio signal that is played once)
to indicate that the assistance from the drive unit is switched
off.
Note: The audio signal will only be played if the system is
switched on.
When the eBike system is switched on, the drive unit will
emit two "Unlock" sounds (i.e. an audio signal that is played
twice) to indicate that the assistance from the drive unit is
enabled again.
The "Lock" sound will help you determine whether or not
the <eBike Lock> on your eBike is active. The audio signal is
activated by default, but it can be deactivated in the eBike
Flow app in the Settings menu item by selecting the lock
symbol below your eBike.
Note: If you can no longer set up or switch off the <eBike
Lock>, please contact your bicycle dealer.
Replacing eBike Components and the <eBike Lock>
Replacing the Smartphone
1. Install the eBike Flow app on the new smartphone.
2. Log in with the same account that was used to activate
the <eBike Lock>.
3. The <eBike Lock> is displayed as set up in the eBike
Flow app.
Replacing the drive unit
1. The <eBike Lock> is displayed as deactivated in
the eBike Flow app.
2. Activate the <eBike Lock> by pushing the <eBike
Lock> controller to the right.
3. If you are handing in your eBike to a bicycle dealer for
maintenance, it is recommended that you temporarily
deactivate the <eBike Lock> to prevent false alarms.
Software updates
Software updates must be manually started in the eBike
Flow app.
Software updates are transferred to the operating unit in the
background of the app as soon as it is connected to the app.
During the update process, a green flashing on the battery
charge indicator (3) shows the progress. The system is then
restarted.
You can control the software updates via the eBike
Flow app.
Error messages
The operating unit shows whether critical errors or less crit-
ical errors occur in the eBike system.
The error messages generated by the eBike system can be
read via the eBike Flow app or by your bicycle retailer.
Bosch eBike Systems
Via a link in the eBike Flow app, information about the error
and support for rectifying the error can be displayed.
Less critical errors
Less critical errors are shown by the assistance level LED (5)
flashing orange. Pressing the select button (2) confirms the
error and the assistance level LED (5) once again continu-
ously shows the colour of the set assistance level.
You can use the following table to rectify the errors yourself
if necessary. Otherwise, please contact your bicycle retailer.
Number Troubleshooting
523005 The indicated error numbers show that
there is interference when the sensors de-
514001
tect the magnetic field. See whether you
514002
have lost the magnet while riding.
514003
If you are using a magnet sensor, check that
514006
the sensor and magnet have been properly
installed. Make sure too that the cable to the
sensor is not damaged.
If you are using a rim magnet, make sure that
you do not have any magnetic field interfer-
ence in the vicinity of the drive unit.
Critical errors
Critical errors are shown by the assistance level LED (5) and
the battery charge indicator (3) flashing red. Follow the in-
structions in the table below if a critical error occurs.
Number Instructions
660001 Do not charge the battery and do not
continue to use it.
660002
Please contact your Bosch eBike
dealer.
890000 – Acknowledge the error code.
– Restart the system.
If the problem persists:
– Acknowledge the error code.
– Perform software update.
– Restart the system.
If the problem persists:
– Please contact your Bosch eBike
dealer.

Maintenance and servicing

Maintenance and cleaning

The operating unit must not be cleaned with pressurised wa-
ter.
Keep the operating unit clean. Dirt can cause faulty bright-
ness detection.
Clean your operating unit using a soft cloth dampened only
with water. Do not use cleaning products of any kind.
Have all repairs performed only by an authorised bike
u
dealer.
English – 5
0 275 007 3RL | (09.03.2022)