husqvarna · Automower Technical Manual
The green LED on the charging station is flashing once per second, indicating a break in the boundary loop wire and no signal is available.
Click steps to track your progress.
Disconnect all cables from the charging station and measure the resistance in the loop wire using a multimeter. Correct resistance should be between 0-20 Ohm.
If the value is >20 Ohm, locate and repair the break in the loop. Use an appropriate break detector or cut the area in half using the guide wire to find the break more quickly.
If the value is <20 Ohm, check all connections to the charging station.
If the fault cannot be corrected, consider replacing the circuit card in the charging station (see section 5.3 on page 89).