AFFZP0BB – ACE3 – User Manual Page – 105/139
5) VDC LINK OVERV.
Cause
This fault is displayed when the controller detects an overvoltage condition.
Overvoltage threshold is 65 V for 36/48V controllers and 116 V for 80V
controllers.
As soon as the fault occurs, power bridge and MC are opened. The condition is
triggered using the same HW interrupt used for undervoltage detection, uC
discerns between the two evaluating the voltage present across DC-link
capacitors:
- High voltage Overvoltage condition
- Low/normal voltage Undervoltage condition
Troubleshooting
If the alarm happens during the brake release, check the line contactor contact
and the battery power-cable connection.
6) WATCH DOG
Cause:
This is a safety related test. It is a self-diagnosis test that involves the logic
between master and supervisor microcontrollers.
Troubleshooting
This alarm could be caused by a CAN bus malfunctioning, which blinds
master-supervisor communication.
7) WRONG RAM MEM. 05
Cause:
The algorithm implemented to check the main RAM registers finds wrong
contents: the register is “dirty”. This alarm inhibits the machine operations.
Troubleshooting
Try to switch the key off and then on again, if the alarm is still present replace
the logic board.
8) SP MISMATCH XX
Cause:
This is a safety related test. The master μC has detected a supervisor μC wrong
set point.
Troubleshooting:
- Check the matching of the parameters between master and supervisor.
- Ask for assistance to a Zapi technician.
- If the problem is not solved, replace the logic board.
9) OUT MISMATCH XX
Cause:
This is a safety related test. Supervisor μC has detected that master μC is
driving traction motor in a wrong way (not corresponding to the operator
request).
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