CHALLENGER-15
· Operating Manual 03 / 2021
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22. TROUBLESHOOTING
This table lists all the problems that can occur when using the unit.
Carry out all recommended checks and repairs as described in
the table.
If an error occurs that is not listed in the table or if you cannot
rectify an error yourself, the unit should be handed over to the
responsible service centre for repair.
Malfunction
Possible reason
Correction
The thermal imager
cannot be switched on.
The battery is complete-
ly discharged.
Charge the battery.
Can‘t be powered by an
external power source.
USB cable is damaged.
Replace USB cable.
The external power
source is discharged
Charge the external
power source (if nec-
essary).
The image is blurred,
with vertical lines and
an uneven background.
Calibration needed.
Perform image cali-
bration as described in
section 14. "Calibration
Function (FCC)".
The image is too dark.
The brightness setting is
too low.
Set the
display brightness
Coloured lines appear
on the display or no
image is shown.
The unit has been
exposed to static elec-
tricity during operation.
After the unit has been
exposed to static elec-
tricity, the unit will either
restart automatically or
you will have to switch
it off and on again
manually.
Low image quality/re-
duced detection range.
These problems can occur when an observation is
carried out on a day with difficult weather condi-
tions (high humidity, snowfall, rain, fog etc.).
The smartphone or
tablet PC cannot be
connected to the unit.
The unit’s password has
been changed.
Delete the network and
reconnect using the
existing password.
The unit is located in an
area with a large num-
ber of WiFi networks that
may cause interference.
To ensure stable WiFi
operation, place the
unit in another location
with fewer or no WiFi
networks at all.
No WiFi signal available
or interrupted.
The unit is outside the
WiFi range. There are
obstacles between the
unit and the receiver
(e.g. concrete walls).
Place the unit within line
of sight and range of the
WiFi signal.
When the unit is used at
low temperatures, the
image quality of the
surroundings is worse
than at temperatures
above freezing.
At temperatures above freezing, the observed
objects (surroundings and background) are dif-
ferent temperatures due to thermal conductivity,
resulting in a high temperature contrast. Thus, the
picture quality achieved by the unit is higher.
At low outdoor temperatures, the observed
objects (background) usually cool down to about
the same temperature, so that the temperature
contrast is considerably reduced and the image
quality (details) is lower as a result. This is a property
of thermal imagers.
