Yamaha PW-SE series Original Instructions Manual - Troubleshooting

49

TROUBLESHOOTING

Symptom

Check

Action

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

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.

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.