Husqvarna Automower 435X AWD Workshop Manual page 73

7.3.2 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.
Table 10: Colours in the charging station's LED
Colour
Green solid light
Green flashing light
Blue flashing light
Red flashing light
Red solid light
In the event of faults in the charging station follow the
instructions in the Operator's manual and below.
7.3.2.1 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. 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 59 .
7.3.2.2 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 pressing 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 press
the STOP button.
1061 - 001 -
Status
All signals are OK
ECO mode
Malfunction in the boun-
dary loop
Malfunction in the charging
station N and F signal
Fault in the circuit board,
or incorrect power supply
in the charging station.
7.3.2.3 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 59 .
7.3.2.4 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. Remove the charging station's cover and disconnect
the connector from the circuit board.
2. Measure the resistance crosswise between the 4
pins in the cabling's connector that has white cables
connected to it.
Resistance value Indicates
The value for one The baseplate is
of the cable pairs broken.
>20 Ohm
The value for The baseplate is
both cable pairs intact.
< 20 Ohm
7.3.2.5 Solid red 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.
To replace the circuit
Action
Replace the
baseplate.
Change charging
station circuit
board. Refer to
To replace the
circuit board in
the charging sta-
tion on page 59 .
Troubleshooting - 73