chapter 5000
page 44
1,2 - 2,0 t A.C.
SERVICE MANUAL
Electric
036-0410-07
TESTER
DUAL AC2 MASTER TRACTION UNIT
MOTOR VOLTAGE: voltage supplied to the motor by the inverter; it is expressed as a
percentage of the full voltage (which depends on the battery voltage).
FREQUENCY: frequency of the voltage and current supplied to the motor.
ENCODER: motor speed, expressed in the same unit as the frequency; this
information comes from the speed sensor.
SLIP VALUE: difference between the rotating field frequency and the motor shaft
frequency (measured by the encoder)
CURRENT RMS: Root Mean Square value of the motor current.
TEMPERATURE: temperature measured on the aluminum heat sink holding the MOSFET
devices.
TEMPERATURE #1: not used.
TEMPERATURE #2: not used.
ACCELERATOR: voltage of the accelerator potentiometer’s wiper (CPOT). The voltage
level is shown on the left hand side of the Console Display and the
value in percentage is shown on the right hand side.
STEER ANGLE: indication of the angular displacement of the steered wheel.
BRAKE PEDAL POTI: not used.
INTERNAL WHEEL CUTBACK: indication of the speed reduction applied to the internal wheel; in other
words, it shows the ratio of the two speeds.
SEAT SWITCH: state of the Seat Microswitch digital input.
ON / +VB* = active input, closed switch.
OFF / GND = non-active input, open switch.
FORWARD SWITCH: state of the Forward direction digital input FW.
ON / +VB* = active input, closed switch.
OFF / GND = non-active input, open switch.
BACKWARD SWITCH: state of the Reverse direction digital input BW.
ON / +VB* = active input, closed switch.
OFF / GND = non-active input, open switch.
ENABLE SWITCH: state of the Enable digital input:
ON / +VB*= active input, closed switch.
OFF / GND = non-active input, open switch.
BRAKE SWITCH: state of the Brake Pedal Microswitch.
ON / +VB* = active input, closed switch.
OFF / GND = non-active input, open switch.
CUTBACK SWITCH: state of the Speed Reduction Microswitch.
ON / GND = active input, opened switch.
OFF / +VB* = non-active input, closed switch.
EXCLUSIVE HYDRO: state of the exclusive hydro switch.
ON / +VB* = active input, closed switch.
OFF / GND = non-active input, open switch.
HAND BRAKE: state of the Handbrake Microswitch.
ON / GND = active input, opened switch.
OFF / +VB* = non-active input, closed switch.
VOLTAGE BOOSTER: voltage booster supplied to the motor in load condition; it is expressed
as a percentage of the full voltage.
BATTERY VOLTAGE: level of battery voltage measured with the key switch ON.
BATTERY CHARGE: percentage of battery charge.
* = The console shows “ + VB “, but the real voltage is +5V
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