The Loop System's Control Signals; The Loop System's Status - Husqvarna Automower 305 Technical Manual

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1�6 The loop system's control
signals
The loop system consists of a boundary wire and
a guide cable connected to the charging station.
Together they essentially comprise three different
signals:
A-signal
F-signal
Guide-signal
Guide
To check the A-, F- and Guide-signals, see Loop
(5-1-3).
A-signal
The signal that the charging station transmits
over the loop and which demarcates the
working area for the Automower® 305.
Coded information is transmitted via the
A-signal to the mower.
When there is no A-signal, for example if
there is a break in the boundary wire or in
the power supply to the charging station,
the Automower® 305 stops and displays the
message "No loop signal".
F-signal
Remote signal from the charging station
which has a range of 2-3 metres. The signal
is generated by the large coil in the charging
station plate. The F-signal is used so that
the mower knows that it in the vicinity of the
charging station.
If there is no F-signal, the Automower®
cannot find the charging station. The mower
will eventually stop and display the message
"Low battery voltage".
Guide-signal
The signal that the charging station transmits
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1� FUNCTION
A
F
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through the guide cable. The guide-signals
lead the mower to the charging station,
but can also be used to direct the mower
to a remote area. Guide is marked as the
connection on the rear of the charging
station.
If there is no Guide-signal, the Automower®
is not able to follow the guide cable and
therefore not able to find the charging station
either. The mower will eventually stop and
display the message "Low battery voltage".
1�7 The loop system's status
The loop system's status is most easily checked
using the LED in the charging station. Check the loop
signal by inspecting the LED indicators.
Continuous green light = All signals are OK.
Blue flashing light = No signal in the
boundary wire (A-signal). Most likely a break
in the boundary wire.
Yellow flashing light = No signal in the guide
wire. Most likely a break in the guide wire.
Red flashing light = No F-signal. Most likely
interruption in the charging station's antenna
plate
Continuous blue light = Weak signal in the
boundary wire (A-signal). This may depend
on the boundary wire being over 250 m in
length or that the wire is damaged. If the
mower still works, this is not a problem.
Continuous red light = fault in a circuit board
in the charging station.
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