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82
Troubleshooting
EN
Calibrate O
2
sensor
Initial contact with
oxygen sensor
Perform calibration of oxygen sensor
Oxygen supply has not
been turned off
Last calibration
performed over 24
hours ago
Device was switched off
completely beforehand
Blower failure
Blower no longer
working
Have device repaired
Internal batt. not
charging due to
overtemperature
Battery too hot
Protect device from direct sunlight, do not
operate near a radiator
Internal batt. not
charging due to
overtemperature
Battery too cold
Ensure that the device is operated within the
permitted temperature range
Replaceable battery not
detected
Battery defective
Have device repaired
Non-approved battery in
use
Use genuine Weinmann battery
Using the WM 27998
battery with a firmware
version < 2.9.0
Update the firmware to version 2.9.0 or above
Replaceable battery is
hard to push in or jams
Particles of dust in guide
rails
Clean guide rails on replaceable battery and
lower part of housing
Service life ended.
Have replaceable battery
replaced.
The replaceable battery
has reached the end of
its service life.
Replace the replaceable battery.
Service life ended.
Have internal battery
replaced.
The internal battery has
reached the end of its
service life.
Replace the internal battery.
Device cannot be
switched on (battery
operation)
Transport securing
device for battery is
active.
The battery fitted is deactivated for transport
purposes. Before using for the first time, connect
the power supply and charge battery.
SpO
2
measurement
disconnection
SpO
2
sensor has slipped
out of place or come
loose from the fingertip
Attach the SpO
2
sensor to the fingertip properly
Fault/fault message
Cause of fault
Remedy