Diagnosis Mode - Yamaha Batavus Guide D'utilisation

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7. Press the function select switch, and the distance (km or mile)
and speed (km/h or MPH) will begin to flash.
8. Use the assist mode switches (up & down) to switch between
'km & km/h' and 'mile & MPH'.
9. Press the power switch. The settings are saved and this function
is exited.

6.22 Diagnosis mode

The e-bike systems are equipped with a diagnosis mode.
When you turn on the power, if there is a malfunction or fault in the
e-bike systems, the systems notify you of the fault by flashing the
assist mode indicator and the battery capacity indicator alternately,
and displaying 'Er' in the speedometer. See 'TROUBLESHOOTING'
on page 30 regarding symptoms and remedies for abnormal
displays and abnormal flashing.
If a fault is displayed, have your bicycle inspected by a dealer as
WARNING
soon as possible.