undervoltage condition. Overvoltage threshold is 45V, undervoltage threshold
is 9V in the 24V controller. In 48V controller overvoltage threshold is 65V,
undervoltage threshold is 11V.
Troubleshooting
of fault displayed at startup or in standby; in these cases it is
very likely the fault is due to an undervoltage, so it is suggested to check:
A) Key input signal down-going pulses (below undervoltage threshold) due
to external loads, like DC/DC converters starting-up, relais or contactor
switching, solenoids energizing / deenergizing.
B) If no voltage transient is detected on the supply line and the alarm is
present every time the key is switched ON, the failure is probably in the
controller hardware, so it is necessary to replace the controller.
Troubleshooting
of fault displayed during motor driving; in this case it can be
an undervoltage or a overvoltage condition.
A) If the alarm happens during traction acceleration or driving hydraulic
functions, it is very likely it is an undervoltage condition; check battery
charge condition, power cable connection.
B) If the alarm happens during release braking, it is very likely it is due to
overvoltage condition; check line contactor contact, battery power cable
connection.
6) “WRONG ZERO”
Cause:
The outputs of the amplifiers (used to measure the motor currents and
voltage) are checked to be near null. This alarm occurs when current signals
are >2,85V or <2,15V. Voltage signals >3V or <2V at the init.
Troubleshooting:
This type of fault is not related to external components; replace the controller.
7) “SAFETY FEED (TG)”
Cause:
This is a safety related test. Slave µC has detected a problem on the
feedback of Lc driver.
Troubleshooting:
This is a internal fault of the controller, it is necessary to replace it.
8) “SAFETY FEED (EB)”
Cause:
This is a safety related test. Slave µC has detected a problem on the
feedback of Eb driver.
Troubleshooting:
This is a internal fault of the controller, it is necessary to replace it.
9) “WRONG SETPOINT”
Cause:
This is a safety related test. Slave µC has detected a Master µC wrong
traction function setpoint.
Troubleshooting:
This is a internal fault of the controller, it is necessary to replace it.
10) “INPUT MISMATCH”
Cause:
This is a safety related test. Slave µC has detected a mismatch between its
input (digital, analog and encoder) and correspondant Master µC inputs.
Troubleshooting:
This is a internal fault of the controller, it is necessary to replace it.
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