8199-201909
Symptom
Check
Action
An assist mode lamp
lights up in red and
an error description is
indicated in the
function display.
Error displays
The speed sensor cannot 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.
The assist mode
indicator and function
display are flashing.
(Power assist is
stopped.)
This is not a malfunction. It is in a state
that the operation of the power assist
system is normal. This state may occur
depending on the pedaling strength and
riding speed, but it returns to normal
condition if it is confirmed that the
system is normal.
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 type
correct?
Use an OTG cable. Also connect the host
side to the display.
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.
Is USB setting set to
“COMM”?
Set the USB settings to “PWR SPLY” by
referring to “Stopwatch and settings” or
turn off the power and then turn it on
again.
