Husqvarna Automower 310 Technical Manual page 91

6.4.1 Solid green light
The LED in the charging station is solid green, but neither
the front or rear loop sensor detects any loop signal:
1. Generate a new loop signal. See 3.10 New loop
signal on page 43. The connection between
the charging station and the mower is restored.
Test run the mower and continue with step 2 if the
mower still cannot find the loop signal for the loop.
2. Replace the circuit board in the charging station.
See 5.20 Replacing the main circuit board,
charging station on page 76.
6.4.2 Green flash
ECO mode is enabled in the mower and no loop signals
are at present being transmitted in the loop wires. If the
mower has been removed from the charging station
manually with the display cover closed, ECO mode may
still be enabled (green flash) so that the loop system is not
transmitting any signals. To start the loop system manually,
the mower must be replaced in the charging station and
the display cover opened. See also the Operator's Manual
for more information about ECO mode.
6.4.3 Blue flashing light
Most likely a break in the boundary loop. Measure the
resistance in the boundary wire using a multimeter.
Disconnect all cables from the charging station during
measuring. The resistance value for a non-faulty boundary
wire should be between 0-20 Ohm.
• Value >20 Ohm: Indicates a break in the boundary
loop. Identify and repair the break. See 6.5 Finding
a break in the boundary loop on page 92.
• Value <20 Ohm: Indicates that the boundary loop
is intact. Check instead the connections to the
charging station. Replace the circuit board in the
charging station if the fault remains. See 5.20
Replacing the main circuit board, charging station
on page 76.
6.4.4 Solid blue light
The boundary loop is probably too long. If the boundary
loop is longer than 800 m / 2 600 ft, the strength can start
to drop even if it is still sufficient.
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6. TROUBLESHOOTING
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2016-05-11 10:16:45