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Solar panels
A number of solar panels connected together transform daylight
into electrical energy. This electrical energy drives the lawn
mower and charges the batteries.
When the lawn mower is in the sun its rays are sufficient to
drive the lawn mower and charge the batteries.
The microprocessor is also used to measure the voltage levels
from the solar panels, and thereby determine whether the lawn
mower has gone into the shade or whether dusk is approach-
ing.
In the evening, when the light intensity is too low, the lawn
mower stops and signals with 1 beep every 10 seconds. This
indicates the night mode.
If the lawn mower avoids the shade during the day, it is be-
cause the batteries at the present time do not have sufficient
capacity and to also ensure a long operating time. Large
amounts of sun (sunny weather) allow the mower to charge fully
before it starts to move, while small amounts of sun (cloudy)
means that it charges a little and then moves hoping to find a
sunnier part of the lawn.
If the lawn mower frequently stops to charge in the shadow, this
is a sign that the batteries are deficient.
To check the operation of the solar panels the jointing sleeves
535 03 86-01 should be dismantled and the current from the
front and rear solar panels should be measured.
TROUBLE SHOOTING
General trouble shooting tips
The dealer should have a test lawn of a least 5 x 5 m, sur-
rounded by a loop cable and generator. This test lawn can be
used in those cases where the customer has a problem with
the lawn mower not detecting signals from the loop cable.
Thereby making it possible to determine whether the operating
disruptions are due to metal objects or electrical power lines in
the customer's garden.
So called “islands“ (see the diagram below), which are formed
with a loop around flowerbeds, fountains, etc. should be routed
in the loop cable’s direction and have a diameter of at least 2 m
(see the Operator’s Manual) to ensure its function. If the
commands F1-9 are changed to increase sensitivity then
smaller “islands“ can also be made, carry out tests before
burying the loop cable.
Read through the entire Workshop Manual and the Operator’s
Manual to determine whether the fault is easily rectified via the
keyboard or with the main power switch.
All trouble shooting should be preceded by at least 1 hour of
charging (with the switch in the off position) outdoors in the
middle of the day, to eliminate the fault being badly charged
batteries.
The panel's connection cables should be connected as follows:
The red cable from the box to the red cable from the front of the
body (suitable length 85 mm).
The black cable from the box to the black cable from the rear of
the body (suitable length 55 mm).
The black cable from the front of the body to the red cable from
the rear of the body (suitable length 70 mm).
When the panels are connected together (in series) the cable
runs to the box and is connected to the connector X1 at terminals
6 (black) and 7 (red). See the circuit diagram on the last page.
As the light intensity can vary a great deal it is difficult to specify
an exact current, however, if a different current is measured from
the front and rear solar panels at the same time, you may
presume that the panel that generates the lowest current is faulty.
535 03 86-01
Eng-SOL VERK 98-01-15, 10.074