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Recording stopped, Battery Empty is displayed The charge is critically low. The training computer
stops recording the training session and saves the
training data and then goes to sleep mode. Charge
the training computer. For more information, see
Training Computer Battery (page 9).
The training computer display is blank The training computer battery is empty and it has
gone to sleep mode. Charge the training computer.
If the battery is totally drained, it may take a while
for the charging animation to appear on the
display. For more information on charging the
battery, see Training Computer Battery (page 9).
Check heart rate sensor! is displayed
• Make sure the heart rate sensor strap has not
loosened during exercise.
• Make sure the electrodes of the heart rate sensor
are wet.
• Make sure the electrodes of the heart rate sensor
are clean and undamaged.
If you have done all of the above-mentioned
actions, and the message still appears and heart
rate measurement does not work, the battery of
your heart rate sensor may be empty. For further
information, see Batteries (page 51).
Check speed sensor! is displayed Make sure the position and distance of the sensor
to the magnet are appropriate. If the message still
appears you may have exceeded 3000 riding hours
and the battery is empty.
Check cadence sensor! is displayed Make sure the position and distance of the
cadence sensor to the crank magnet are
appropriate. If the message still appears, you may
have exceeded 3000 riding hours and the battery
is empty.
Check stride sensor! is displayed Make sure the sensor is correctly positioned on
your foot. If the message still appears, the battery
may be empty. See the user manual for Polar s3+
stride sensor for instructions on changing the
battery.
The heart rate reading becomes erratic, extremely
high or shows nil (00)
• Make sure the heart rate sensor strap has not
loosened during exercise.
• Make sure the textile electrodes in the sports
apparel fit snugly.
• Make sure the electrodes of the heart rate sensor
strap are moistened.
• Make sure the heart rate sensor is clean. Strong
electromagnetic signals can cause erratic
readings. For further information, see
Precautions (page 52).
• If the erratic heart rate reading continues despite
moving away from the source of disturbance,
slow down your speed and check your pulse
manually. If you feel it corresponds to the high
reading on the display, you may be experiencing
cardiac arrhythmia. Most cases of arrhythmia are
not serious, but consult your doctor nevertheless.
• A cardiac event may have altered your ECG
waveform. In this case, consult your doctor.
ENGLISH
Important Information 57