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TROUBLE SHOOTING
Trouble shooting chart
Action
Check that the cable is not broken (by
using the operating test on the generator).
Check the sensor, wipe off any grass or
moisture on the cable connections. Ensure
the cover is fitted. If the problem frequently
recurs cut off the unused pin and insulate
using silicon (see service notice tab 5,
96.018).
Measure the current in the loop cable.
There is a risk that the electromagnetic
field is too weak with values under 7 mA
AC.
Try moving the loop cable.
Check that the loop cable has been laid
according to the instructions in the Installa-
tion guide.
Replace the generator battery.
Reset the processor by disconnecting and
reconnecting one of the batteries 3 times.
Check that the microswitches do not
switch before a tractive force of approx.
10N is applied.
Check the drive motors' circuit board
connection.
Try by replacing one drive motor at a time.
Replace the circuit board.
Replace the batteries.
Observation
3 beep/second
The lawn mower jerks
forwards and backwards
and swings quickly.
The lawn mower stops
frequently to charge when
in the shade.
Possible cause
The lawn mower does not sense the
signal from the loop.
If this occurs in isolated areas it can be
caused by disturbances from metal
objects (fencing, reinforcement) or by
underground cables in the vicinity.
If it occurs in the vicinity of an “island”, it
can be due to the loop cable be routed in
the wrong direction around the “island”
and thereby extinguishing the signal.
If it only occurs in the morning it can be
caused by the battery in the generator
being discharged.
The electronics were started at too low
voltage.
The microswitches switch too easily,
e.g. at corners or over bumps.
Play on the drive motors' contact
connections.
Faulty gearbox on a drive motor or
faulty tachometer (hall element) on a
drive motor.
Electronic fault.
The batteries have discharged.
Eng-SOL VERK 98-01-15, 10.0711