4-3
Troubleshooting
Service
Data
Symptom
Check point/method
Possible cause/check Part replacement/action
The pedal feels heavy.
Is the air pressure in the tires
normal?
Check for appropriate air
pressure.
Check for punctures.
Repair puncture, replace
tube.
Is the gear-shifting working
smoothly?
Check the gear shifting
sys tem.
Replace the gear shifting
sys tem.
Is it being driven up a long
slope in the summer, or
car rying a heavy load?
This is due to the tempera ture
rising in the battery pack or
the Drive Unit assembly, and
is not a malfunction.
The assist power is restored
once the temperature of the
battery pack or the Drive Unit
assembly drops.
Is the ambient temperature
low (around 10°C or below)?
Check the ambient tempera-
ture.
During the winter, store the
battery pack indoors before
use.
The e-bike systems activates
and cuts off during driving.
Is the battery pack securely
locked?
Check the battery pack lock.
Check if the battery pack is
securely locked.
Inspect the battery pack
ter minals and wiring for loose
connection.
The cruising distance is short.
Has the battery pack been
sufficiently charged?
Charge until full.
Is it being used in a low-tem-
perature environment?
Check the ambient tempera-
ture.
This will be restored when the
ambient temperature warms
up.
Is the battery pack degrad-
ing?
Check the battery pack’s Total
number of battery charging
cycles , actual capacity.
Replace the battery pack.
All segments of the assist
mode display and battery
capacity indicator are flash ing
at the same time, and “Er” is
displaying on the speed-
ometer section.
Check the error according to
the display on the display unit
when the error occurred.
(See Chapter 2 “How
communication errors are
displayed”.)
Communication error.
Check the “List of error codes
and corresponding power
assist operations”.
Replace parts according to
“List of error codes and
corresponding power assist
operations”.
Troubleshooting
