Checking The Loop - Husqvarna Automower 210 C Technical Manual

5.23 Checking the loop

To check the loop signal, always start by checking the
green LED in the charging station, see 1.8 Loop signal
strength on page 13. This normally indicates whether
the loop is functioning or not. In the event of a fault,
follow the instructions below:
The LED in the charging station flashes once per
second (single flash):
1. Probably a break in the loop. Measure the
resistance in the loop wire using a multimetre.
Disconnect all cables from the charging station
during measuring. The correct resistance for the
loop should be between 0-20 Ohm.
• Value >20 Ohm: Indicates a break in the loop.
Locate and repair the break. Use the
appropriate break detector or cut the area in half
using the guide wire to find the break more
quickly.
• Value <20 Ohm: Indicates that the loop is intact.
Check the connections to the charging station. If
the fault cannot be corrected, replace the circuit
card in the charging station, see 5.3 Replacing
the circuit card, charging station on page 89.
The LED in the charging station flashes twice per
second (double flash):
1. The loop is probably too long. If the loop is longer
than 500 meters, the strength can start to drop
even if it is still sufficient. For installations where a
longer boundary wire of up to 800 metres (2560 ft)
is required, we recommend a Signal amplifier (522
42 58-01), which is available as an accessory.
The LED in the charging station is solid green, but
there seems to be no function in the loop.
1. Change the PIN code in the mower. During the
change, the PIN code is transmitted to the
charging station and the connection between the
charging station and mower is renewed. 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 card in the charging station,
see 5.3 Replacing the circuit card, charging
station on page 89.
5. REPAIR INSTRUCTIONS
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