Husqvarna Automower 305 Workshop Manual page 48

8.3.1 To troubleshoot the loop signal
Always start by checking the LED in the charging
station. This usually provides a good indication of where
troubleshooting should begin.
Colors in the charging station's LED
Color
Solid green light
Green flashing light
Blue flashing light
Red flashing light
Solid red light
In the event of faults in the charging station follow the
instructions in the Operator's manual and below.
8.3.1.1 Green solid 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. Test the product and
continue with step 2 if the product still cannot find
the loop signal.
2. Replace the circuit board in the charging station.
Refer to To replace the circuit board in the charging
station on page 32 .
8.3.1.2 Green flashing light
ECO mode is enabled in the product and no loop signals
are therefore being transmitted in the loop wires. If the
product has been removed from the charging station
manually without pushing STOP before, ECO mode may
still be enabled (green flashing light) so that the loop
system is not transmitting any signals. To start the loop
system manually:
1. Place the product in the charging station and push
the STOP button.
48 - Troubleshooting
Status
All signals are OK
ECO mode
Malfunction in the boun-
dary loop
Malfunction in the charging
station F and N signal
Fault in the circuit board,
or incorrect power supply
in the charging station.
8.3.1.3 Blue flashing light
A blue flashing light is most likely a break in the
boundary loop.
1. Check the connections to the charging station.
2. Disconnect all cables from the charging station.
3. Measure the resistance in the boundary wire using a
multimeter. 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. Refer to
Boundary loop on page 6 .
• Value <20 Ohm: Indicates that the boundary loop is
intact. Replace connectors to the charging station.
Replace the circuit board in the charging station if
the fault remains. Refer to
board in the charging station on page 32 .
8.3.1.4 Yellow flashing light
A yellow flashing light indicates malfunction in the guide
wire.
1. Check that the guide wire connector is properly
connected to the charging station.
2. Replace the guide connector.
3. Break in the guide wire: Find out where the break is.
Replace the damaged section of the guide wire and
splice the ends using an original coupler.
8.3.1.5 Red flashing light
A red flashing light is most likely an interruption in the N
or the F-wire in the charging station's antenna.
1. Replace the charging station circuit board, or the
baseplate (including the N and F wires). Refer to
replace the circuit board in the charging station on
page 32 and To remove and install the charging
station and the charging station cap on page 31 .
8.3.1.6 Red solid light
A solid red light is probably a fault in the circuit board, or
an incorrect power supply in the charging station.
1. Check the power supply.
2. Replace the charging station circuit board. Refer to
To replace the circuit board in the charging station
on page 32 .
To replace the circuit
To
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