Yamaha PW-SE Original Instructions Manual page 39

Symptom
The Drive Unit turns on and off while
riding.
Strange rumbling or crunching noises
come from the Drive Unit.
Smoke or unusual odor comes from the
Drive Unit.
(Display A)
The main riding display and "Er" are
displayed alternately, and an error
description is indicated in the function
display.
(Display X)
The assist mode lamp lights up in red, the
main riding display and "ER" are displayed
alternately, and an error description is
indicated in the function display.
Displays alternately
Error displays
Check
Check to make sure the
battery pack is locked in
place.
If this problem still occurs
Is the battery with the battery pack firmly
pack correctly locked in place, there may
installed? be a loose connection with
the battery pack terminals
or wires. Have an
authorized dealer inspect
your bicycle.
There could be a problem
inside the Drive Unit.
Have an authorized dealer
inspect your bicycle.
There could be a problem
inside the Drive Unit.
Have an authorized dealer
inspect your bicycle.
The problem occurs in the
e-Bike Systems. Turn off
the power and then turn it
on again.
If the problem cannot be
solved, have your bicycle
inspected by a dealer as
soon as possible.
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Action
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