chapter 5000
page 12
1,2 - 2,0 t A.C.
SERVICE MANUAL
Electric
036-0410-07
GENERAL PRECAUTIONS
- Do not connect the inverter to a battery with a nominal value different from the value indicated on the
chopper plate. If the battery value is greater, the MOS may fail; if it is lower, the control unit does not
"power up".
- During the battery charge, disconnect the INVERTER from the battery.
- Supply the INVERTER only with battery for traction; do not use a power supply.
- When the chopper is installed, make tests with the wheels raised from the ground, in order to avoid danger-
ous situations due to connection errors.
- After the chopper is switched off (key off), the filter capacitors remain charged for some minutes; if you
need to work on the inverter, discharge them using a
10W ÷ 100W resistance connected from the +Batt to the -Batt.
- Before carrying out any arc-welding on the trucks, disconnect the battery and short-circuit the unit between
positive (+) and negative (-).
PROTECTIONS
- Connection Errors:
All inputs are protected against connection errors.
- Thermal protection:
If the chopper temperature exceeds 75°C, the maximum current is reduced in
proportion to the thermal increase. The temperature can never exceeds 100°C.
- External agents:
The inverter is protected against dust and the spray of liquid to a degree of
protection meeting IP54.
- Protection against uncontrolled movements:
The main contactor will not close if:
- the Power unit is not functioning.
- the Logic is not functioning perfectly.
- the output voltage of the accelerator does not fall below the minimum voltage value stored, with 1V
added.
- running microswitch in closed position.
- Protection against accidental Start up
A precise sequence of operations are necessary before the machine starts.
Operation cannot begin if these operations are not carried out correctly.
Drive requests must be made after closing the key switch.
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