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1.3 SAFETY FEATURES
- Inverted battery polarity:
Connections must be made as indicated in the wiring diagrams to avoid damaging
the power unit.
- Connection errors:
All the inputs are protected against wrong connection.
- Thermal protection:
If the temperature of the 4Q exceeds 75°C, the maximum current is automatically
reduced in proportion to the temperature increase. The temperature cannot exceed
90°C, at this temperature the maximum current is zeroed. If the temperature drops to
below –10°C, the maximum current is reduced by 20%.
- Battery low:
When the battery runs down (<= 10%) the maximum current is reduced by 50%.
This function can be excluded using the console (“Battery Check” option).
- External agents:
The chopper has IP54 protection.
- Protection against accidental starting:
A precise sequence of operations is required to start the machine, if the sequence is
not carried out correctly the machine will not start.
The start running command must be given after key-on and activating the seat
microswitch, if configured. If on the other hand the tiller is configured, it must be
activated with a predefined minimum delay time compared to the activation of a start
running microswitch.
- Protection against uncontrolled movement:
The electromagnetic switch does not close if:
- the power unit is not in function,
- the output voltage of the accelerator does not drop to below the recorded
minimum value increased by 1V,
- the potentiometer negative is disconnected,
- the logic is not in good working order,
- one of the start microswitches is closed.
- the controller fulfil the requirements specified on the EN1175 (point 5.9.4). The
requirements specified on point 5.9.5 have to be fulfil by external solutions.
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