Operation Manual

88 - English English - 89
37
TROUBLESHOOTING
Symptom Check Action
The speedometer
displays “Er”.
There could be a problem inside the
Drive Unit is malfunctioning.
Turn on the power to the display unit and
then leave it alone for 5 minutes. All
indicators will turn off automatically.
Turn the power on again.
The assist mode
indicator and battery
capacity indicator
flash rapidly
alternately.
The display unit shuts
down immediately
(approx. 4 seconds
later) after switching
the power on.
Are the bicycle’s battery
pack connection
terminals dirty?
Remove the battery pack, clean the
bicycle’s terminals with a dry cloth or
cotton swab, and then install the battery
pack again.
Traveling range has
decreased.
Are you fully charging
the battery pack?
Charge the battery pack until full (F).
Are you using the
system under low-
temperature
conditions?
Normal traveling range will be restored
when the ambient temperature rises.
Additionally, storing the battery pack
indoors (in a warm location) before use
will improve traveling range under cold
conditions.
Is the battery pack worn
out?
Replace the battery pack.
The assist mode
indicators are
flashing.
These indicators will flash when the
speed sensor is unable to detect a
correct signal.
Turn off the power to the display unit and
then turn it on again, select the assist
mode and then ride for a short distance.
Also, make sure the magnet is mounted
correctly on the spokes of the wheels.
38
TROUBLESHOOTING
Running assist function
Symptom Check Action
The running assist
function does not
work.
When you press the running assist
switch once, the running assist indicator
will come on for five seconds.
Press and hold the running assist switch
again while the running assist indicator
is still lit.
The running assist
function turns off.
Did the tires lock for a
few seconds?
Remove your finger from the running
assist switch for a moment, and then
operate the running assist function
again.
Did you pedal while the
running assist function
was running?
Take your feet off the pedals, and remove
your finger from the running assist
switch for a moment, and then operate
the running assist function again.
Power supply of external devices via USB connection
Symptom Check Action
Power is not supplied.
Is the display unit’s
power on?
Press the power switch on the display
unit to turn the power on.
Is the USB version
correct?
Use an external device that complies
with USB 2.0.
Is the USB cable firmly
connected?
Re-connect the USB cable.
Is the USB receptacle
or USB plug terminal
dirty or wet?
Disconnect the USB cable from the
display unit and external device. Remove
the dirt and water on the USB receptacle
and USB plug terminal and re-connect
the cable.