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YF10 instruction manual
Battery replacement
This watch tells you battery replacement period when battery voltage becomes low
by stopping all the hands at the 6 o’clock position.
• The indication is canceled by pressing button but early replacement of the battery
is recommended.
• You can check battery remaining of the watch on the [CHOOSE DEVICE] screen
of the dedicated app.
When replacing the battery
1
Turn the case back of the watch counterclockwise using a coin or something
similar.
Case back
• Turn the case back until the engraving on it (
▲
) aligns with
△
on the case edge.
2
Turn the watch over to remove the battery.
3
Put a new battery in to the watch.
• Set the battery so that its plus (+) will come to the top.
4
Confirm that the rubber packing for waterproofing is set at the correct
position.
Backside view when the case back
was removed
Rubber packing for
waterproofing
Battery
5
Put on the case back confirming that the engraving on it (
▲
) aligns with
△
on the case edge and turn the case back clockwise.
• Turn the case back until the engraving on it (
▲
) aligns with
▲
on the case edge.
• Take care so that any foreign matter such as thread waste is not caught between the
case back and the case.
• Turn the case back securely until the slot become straightly horizontal.
• After replacing the battery, start the dedicated app and synchronize the watch and
the smartphone.
Troubleshooting
Symptom
Remedies
Pairing
Cannot execute pairing,
synchronization or update.
Set the watch near the smartphone.
Check the settings of Bluetooth and positional
information the smartphone and the dedicated app.
Cancel existing pairing and execute pairing again if
you had executed pairing.
If all the hands of the watch sometimes stop at the 6
o’clock position, replace the battery.
All the hands of the watch
stop at the 6 o’clock position. Replace the battery of the watch.
I want to Cancel existing
pairing.
Choose the watch you currently use on the [CHOOSE
DEVICE] screen of the dedicated app, swipe up the
tab on the bottom of the screen, then tap [REMOVE
WATCH] to cancel pairing with it.
After that, remove the name of the watch you currently
use on the Bluetooth setting of your smartphone.
Time/calendar
Cannot adjust time/
calendar.
You cannot adjust time and calendar manually on this
watch. The watch follows the time and calendar of
your smartphone by connecting with it through the
dedicated app.
Time/calendar is incorrect.
Check time and calendar on your smartphone and start
up the dedicated app to synchronize it with the watch.
Correct the reference position of the hands of the
watch. Choose the watch you currently use on the
[CHOOSE DEVICE] screen of the dedicated app,
swipe up the tab on the bottom of the screen, then tap
Activity monitor
My sleep is not recorded on
the activity monitor.
It is automatically recorded when you put on the watch
while you are sleeping.
I want to change my
account name.
Tap your account name on the side menu on the
dedicated app.
I want to change the values
of my height and weight.
Tap [Wellness] then [Profile] on the side menu of the
dedicated app.
I want to change the units
for length and temperature
on the dedicated app.
Tap [Preferred Units] on the [MY PREFERENCES]
screen of the dedicated app.
Data of the activity monitor
is not sent to the dedicated
app.
Replace the battery of the watch when battery
remaining of the watch is small.
Put the watch on your wrist correctly.
Notification/alarm
No notifications come.
Check the setting of notification on the [MY
PREFERENCES] screen of the dedicated app.
Check whether the switch of [Do Not Disturb] is
deactivated on the [MY PREFERENCES] screen of the
dedicated app.
Alarm does not work.
Check the settings of alarm on/off, alarm time and
alarm repetition on the [ALARMS] screen from the
[MY PREFERENCES] screen of the dedicated app.
Others
I want to check battery
remaining.
Choose the watch you currently use on the [CHOOSE
DEVICE] screen of the dedicated app, swipe up the tab
on the bottom of the screen, then check the value of
The hands stop.
When all the hands of the watch stop at the 6 o’clock
position, battery remaining of the watch is not enough.
Replace the battery soon.
• If any of the methods above does not solve your problem, remove the battery from
your watch and set it again.
