AF6ZP0CA – COMBIAC0 & ACE0 2uC – User Manual Page – 135/155
VDC LINK OVERV. (MDI/LED code = 77)
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.
W.SET. TG-EB (MDI/LED code = 59)
Cause:
Supervisor microcontroller has detected that the master microcontroller has
imposed a wrong setpoint for TG or EB output.
Troubleshooting:
- Check the matching of the parameters between master and supervisor.
- Ask for the assistance of a Zapi technician.
- If the problem is not solved, replace the logic board.
WATCHDOG (MDI/LED code = 8)
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.
WRONG ENC SET (MDI/LED code = 85)
Cause:
Mismatch between ENCODER PULSES 1 parameter and ENCODER
PULSES 2 parameter (see paragraph 8.2.5).
Troubleshooting
Set the two parameters with the same value, according to the adopted
encoder.
WRONG RAM MEM. (MDI/LED code = 71)
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.
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