Page - 74/85 AF2ZP0CL - ACE2 - User Manual
Cause:
When the key is switched ON, the inverter tries to charge the power
capacitors through a series of a PTC and a power resistance, and check if
the capacitor are charged within a timeout. If the capacitor voltage measured
is less than 20% of the nominal battery voltage, an alarm is signalled; the
main contactor is not closed.
Troubleshooting:
- There is an external load in parallel to capacitor bank, which sinks
current from the controller capacitors pre-charging circuit, thus preventing
the caps from charging. Check if a lamp or a dc/dc converter or an
auxiliary load is placed in parallel to capacitor bank.
- The charging resistance or PTC is opened; insert a power resistance
across line contactor power terminals; if the alarm disappears, it means
the controller internal charging resistance is damaged.
- The charging circuit has a failure, inside the controller.
- There is a problem in the controller power section.
5) COIL SHORT HW KO
Cause:
The hardware circuits which manages short circuits protection of LC and
EB/AUX coils has a problem.
Troubleshooting:
This type of fault is not related to external components; replace the ACE logic
board.
6) DRIVER SHORTED
Cause:
The driver of the main contactor coil is shorted.
Troubleshooting:
- Check if there is a short or a low impedance pull-down between NMC
(CNA#16) and –BATT.
- The driver circuit is damaged in the logic board, which has to be
replaced.
7) AUX DRIVER SHORTED
Cause:
The driver of the electro mechanic brake/ auxiliary electro valve coil is
shorted.
Troubleshooting:
- Check if there is a short or a low impedance pull-down between
NEB/NAUX (CNA#18) and –BATT.
- The driver circuit is damaged in the logic board, which has to be
replaced.
8) SAFETY IN
Cause:
The safety input is opened and accordingly the MC is opened an EB/AUX
OUT coil is driven.
Troubleshooting:
Check the CAN#11 input, if it is connected to –Batt and the alarm is
generated then there is a fault in the SAFETY IN hardware circuit. Replace
the logic board.
9) SAFETY OUT
Cause:
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