Page – 12/139 AFFZP0BB – ACE3 – User Manual
2.5 Diagnoses
The microcontroller continually monitors the inverter and carries out a diagnostic
procedure of the main functions. Diagnoses are made of 4 steps:
1) Diagnosis at the key-on that checks: watchdog circuits, current sensors,
charging of capacitors, phase voltages, contactor driver, CAN bus interface, if
the switching sequence of microswitches is correct and if the accelerator unit is
in the correct position.
2) Diagnosis during standby that checks: watchdog circuits, phase voltages,
contactor driver, current sensors and CAN bus interface.
3) Diagnosis during operation that checks: watchdog circuits, contactor driver,
current sensors and CAN bus interface.
4) Continuous diagnoses that check: inverter and motor temperature.
Diagnoses can be provided in two ways: the digital console can be used, which
gives detailed information about failures; as an alternative the failure code is sent on
the CAN bus and can be monitored by means of Zapi PC CAN Console.
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