chapter 5000
page 11
1,2 - 2,0 t A.C.
SERVICE MANUAL
Electric
036-0410-07
OPERATIONAL FEATURES
- Speed control.
- Very good behaviour on a slope due to the speed feedback.
- The motor speed follows the accelerator, starting a regenerative braking if the speed overtakes the speed
set point.
- Stable speed in every position of the accelerator.
- Regenerative release braking based upon deceleration ramps.
- Regenerative braking when the accelerator pedal is partially released (deceleration).
- Direction inversion with regenerative braking based upon deceleration ramp.
- Regenerative braking and direction inversion without contactors: only the two main
contactors are present.
- The release braking ramp can be modulated by an analog input, so that a proportional brake feature is obtained.
- Very good sensitivity at low speeds.
- Voltage boost at the start and with overload to obtain more torque (with current control).
- High efficiency of motor and battery due to high frequency commutations.
- Self diagnosis with indication of the fault shown by numeric display.
- Modification of parameters through the programming console.
- Internal hour-meter with values that can be displayed on the console.
- Memory of the last five alarms with relative hour-meter and temperature displayed on the console.
- Test function within console for checking main parameters.
- Hydraulic steering function:
1) traction inverter
- the traction inverter sends a "hydraulic steering function" request to the pump inverter on the can-bus line
2) pump inverter
- the pump inverter manages a "hydraulic steering function". That is, it drives the pump motor at the
programmed speed for the programmed time.
DIAGNOSIS
The microprocessor continually monitors the inverter and carries out a diagnostic procedure on the main
functions. The diagnosis is made in 4 points:
1) Diagnosis on key switch closing that checks: watchdog circuit, current sensor, capacitor charging, phases’
voltages, contactor drives, can-bus interface, if the switch sequence for operation is correct and if the
output of the accelerator unit is correct.
2) Standby diagnosis at rest that checks: watchdog circuit, phases’ voltages, contactor driver, current sensor,
can-bus interface.
3) Diagnosis during operation that checks: watchdog circuits, contactor driver, current sensors, can-bus
interface.
4) Continuous diagnosis that checks: temperature of the inverter.
Diagnosis is provided in two ways.
- the diagnostic ERROR DISPLAY placed to the dashboard that shows the code number for a
given alarm (see the chapter 5000 Alarm description).
- the digital console, which gives more detailed information about the failure.
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