User's Guide

Error Code
Error Message
Required Action
1021
Data acquisition from
the sensor may have
failed. Use the Settings
screen to perform a
System Restart
operation.
Data acquisition from one of the following
sensors may have failed for some reason:
pressure sensor, accelerometer, gyro sensor,
magnetic sensor, optical sensor (PPG Heart
Rate). Restart the watch by performing the
following steps: Swipe the watch face from top
to bottom. > Tap D. > Tap “System”. > Tap
“Restart”.
If this message/error code keeps appearing
after restart, request servicing by your original
retailer or an authorized CASIO service center.
9000
Some problem
occurred with the
watch. Power will turn
off shortly.
To restart the watch, first charge it for at least
one hour. Next, hold down the power button for
about 12 seconds until the display color
changes.
9001, 9002, 9003
Some problem
occurred with the
watch. Power will turn
off shortly.
Take your watch to an authorized CASIO
service center or to your original retailer for
inspection and repair.
9010
Watch temperature is
high. Power will turn off
to protect it.
Remove the watch from your wrist and leave it
in a location that is not exposed to direct
sunlight, where the temperature is between
10°C and 30°C (50°F and 86°F) to allow the
watch to cool down. You will be able to turn the
watch on again after it reaches a lower
temperature.
EN-106