Troubleshooting For The Ergo Power-Assist Mode - Bosch Drive Unit Speed Manual Original

› Riding steadily for extended periods allows the
ERGO system to learn how you handle the bike
and adapt better to your own personal handling
style and the behaviour of your heart rate. It may
take some time to do so and the system must
"learn" these behaviours all over again if the
ERGO settings are readjusted.
› If you have run the battery all the way down
to empty, the system switches off completely.
When this occurs, the NuVinci Harmony gears
no longer function either. After five minutes, the
battery will have recovered and you can switch
the system back on again. The display functions
once more. From now on, please only ride in the
mode "no assistance/stand by". At this point
you can also operate the gears once more. In this
way, you can ride for another hour until the bat-
tery finally switches off. Attention: The battery
1.2 Troubleshooting for the ERGO
power-assist mode
TEXT
"Please put on chest
belt" permanently
shown on display
"Determine heart
rate ..." permanently
shown on display
12 VI User Manual | Impulse Ergo Pedelec
CAUSE
The chest belt is too loose
The battery of the chest belt is
empty
There is no layer of moisture
between the skin and the elec-
trodes.
The chest belt is dirty
Electromagnetic disturbance (high-
voltage power lines, traffic lights,
MP3 players, overhead cables,
mobile phones, other training
devices)
switches off as soon as you begin to ride using
the power-assist mode once more.
Observe the following points to avoid major short-
term variations in your heart rate:
› Pedal evenly with a constant level of effort.
› If you come to a hill, do not try to maintain the
same speed. But do try to maintain the same
level of physical effort. Of course, your speed
decreases as the incline becomes steeper
› Do not sprint when riding.
SOLUTION
• Tighten the chest belt.
• Change the battery. To do so, unscrew the battery
cover on the reverse of the chest belt using a coin
and exchange the battery beneath the cover for an
appropriate replacement battery ensuring that the
polarity is not reversed.
• Moisten the chest belt with electrode gel or water
before putting it on.
• Clean the chest belt with lukewarm water and a
mild soap solution.
• Stay away from possible sources of disturbance.
• First switch the Impulse ERGO Pedelec off, and
then on again.