Husqvarna Automower 305 Technical Manual page 86

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-defective 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 wire" on page 85.
• Value <20 Ohm: Indicates that the
boundary wire is intact. Check instead
the connections to the charging station.
Replace the circuit board in the charging
station if the fault remains, see "5.5
Replacing the circuit board, charging
station" on page 57.
6.4.4 Solid blue light
The boundary loop is probably too long. If the
boundary wire is longer than 250 metres, the
strength can start to drop even if it is still sufficient.
6.4.5 Yellow flashing light
Most likely a break in the guide loop. Measure the
resistance in the guide wire using a multimeter.
The guide loop comprises the guide wire plus
the part of the boundary wire that constitutes
the return line for the guide signal. Disconnect
all cables from the charging station during
measuring. The resistance value for a non-
defective guide loop 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 wire".
English - 84
6. TROUBLESHOOTING
6.4.6 Red flashing light
Probably an interruption in the F loop in the charging
station's antenna plate.
6.4.7 Solid red light
Probably a fault in the circuit board in the charging
station. Replace the circuit board in the charging station,
see "5.5 Replacing the circuit board, charging station" on
page 57.
• Value <20 Ohm: Indicates that the loop is
intact. Check instead the connections to the
charging station. Replace the circuit board in
the charging station if the fault remains, see "5.5
Replacing the circuit board, charging station" on
page 57.
1. Place the charging station upside down and look
for visible damage to the F loop.
2. Remove the charging station's cover and
disconnect the connector from the circuit board.
Measure the resistance between the two pins
in the cabling's connector that has white cables
connected to it.
- Value >20 Ohm: Indicates an interruption in the
F loop. Replace the charging station's cabling.
- Value < 20 ohm: Indicates that the F loop is
intact. Replace the charging station's circuit
board, see "5.5 Replacing the circuit board,
charging station" on page 57.
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