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7.7 Audio Signals and Warnings
The Control Unit has a number of audio signals and a warning signal. A warning
consists of short beeps for 8 seconds while some or all of the light indicators ash
depending on the reason for the warning. An audio signal is a single beep that can
be either short or long.
7.7.1 Warnings
The Control Unit will always give a warning if it receives signals from the Heel
Switch without being able to send a signal to the Antenna. This will typically be if
the Antenna is disconnected but it can also be because there is not enough power on
the Control Unit battery to send signals to the Antenna.
Reasons for warnings:
• The Control Unit is out of power. The Control Unit battery indicator is red and
ashing and the Control Unit will beep for 8 seconds with an interval of 30 sec-
onds until you charge it. The Heel Switch battery indicator is also ashing while
all other indicators are turned o.
• Response: Charge the Control Unit as soon as possible (see section 7.6.1 on
page 39 about charging of the Control Unit).
Figure 10: Wall plug Europe
Figure 11: Wall plug UK
Figure 12: Wall plug US and Japan
Figure 13: Wall plug Australia
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