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Trouble Check Items Remedy
Measure the current speed,
but cannot measure the ca-
dence.
Is the connection on the ca-
dence side of the speed sen-
sor dirty?
The continuity on the cadence side of the speed
sensor is bad.
Loosen the set screw on the cadence side to
remove the cadence sensor. Clean the pins with
a dry cloth and replace the sensor. After cleaning,
adjust the distance to the magnet, and then
firmly secure the sensor.
Heart rate signals are not
received.
Is the Heart rate sensor icon
on
?
If icon is off, the wristwatch cannot receive
any data. Press the MODE1 or MODE2 button to
cancel the transmission sleep (page 23).
Has the power-saving mode
been activated, entering
Clock mode?
Press the MENU button to switch to Sports
mode.
Is the heart rate sensor at-
tached securely to your
body?
Adjust the electrode pad with its rubber surface
to have a good contact with the body.
Dry skin
(particularly in winter)
Slightly moisten the electrode pad of the heart
rate sensor.
Is the battery for the heart rate
sensor used up?
Replace it with a new battery (CR2032).
Check whether
lights up
on the wristwatch screen.
The remaining battery capacity of the wristwatch
is low. Replace it with a new battery (CR2430).
After replacement, be sure to perform the restart-
ing operation (page 14).
Is the electrode pad overly
worn and damaged after long
use?
Replace it with a new heart rate sensor.
Did you perform the format-
ting operation?
The sensor ID was deleted by formatting. Synchro-
nize the heart rate sensor ID again (page 53).
Fluctuation in the heart rate
indicator, for example it re-
turns to zero and then the
heart rate is measured
again.
Is the electrode pad being
worn correctly?
To wear the electrode pad correctly, follow the
instructions for wearing the heart rate sensor
(page 13).
Moving the main unit away
from your body will prevent
measurement of the heart
rate.
Check whether
lights up
on the wristwatch screen.
The remaining battery capacity of the wristwatch
is low. Replace it with a new battery (CR2430).
After replacement, be sure to perform the restart-
ing operation (page 14).
Is the battery for the heart rate
sensor used up?
Replace it with a new battery (CR2032).
The sea level altitude display
is wrong.
Have you corrected the sea
level altitude?
The sea level altitude may have errors due to the
change in atmospheric pressure. Correct the sea
level altitude before use (page 60).
Some values in the Data
mode “Past records” have
been reset.
Did you change any date in
the past according to “Setting
the clock/date”?
Some values for the year, month, or week are
deleted according to the relevant changes. For
details, see page 48.