TROUBLE SHOOTING
Trouble shooting chart
Observation | Possible cause | Action |
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3 beep/second | The lawn mower does not sense the | Check that the cable is not broken (by |
| signal from the loop. | using the operating test on the generator). |
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| Check the sensor, wipe off any grass or |
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| moisture on the cable connections. Ensure |
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| the cover is fitted. If the problem frequently |
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| recurs cut off the unused pin and insulate |
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| using silicon (see service notice tab 5, |
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| 96.018). |
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| Measure the current in the loop cable. |
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| There is a risk that the electromagnetic |
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| field is too weak with values under 7 mA |
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| AC. |
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| If this occurs in isolated areas it can be | Try moving the loop cable. |
| caused by disturbances from metal |
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| objects (fencing, reinforcement) or by |
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| underground cables in the vicinity. |
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| If it occurs in the vicinity of an “island”, it | Check that the loop cable has been laid |
| can be due to the loop cable be routed in | according to the instructions in the Installa- |
| the wrong direction around the “island” | tion guide. |
| and thereby extinguishing the signal. |
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| If it only occurs in the morning it can be | Replace the generator battery. |
| caused by the battery in the generator |
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| being discharged. |
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The lawn mower jerks | The electronics were started at too low | Reset the processor by disconnecting and |
forwards and backwards | voltage. | reconnecting one of the batteries 3 times. |
and swings quickly. |
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| The microswitches switch too easily, | Check that the microswitches do not |
| e.g. at corners or over bumps. | switch before a tractive force of approx. |
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| 10N is applied. |
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| Play on the drive motors' contact | Check the drive motors' circuit board |
| connections. | connection. |
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| Faulty gearbox on a drive motor or | Try by replacing one drive motor at a time. |
| faulty tachometer (hall element) on a |
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| drive motor. |
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| Electronic fault. | Replace the circuit board. |
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The lawn mower stops | The batteries have discharged. | Replace the batteries. |
frequently to charge when |
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in the shade. |
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English – 11
