Specifications

2=CA#&
CONTACTOR OPEN:
The main contactor coil has been driven by the logic board, but the contactor does
not close. Two possible reasons:
a) the wires to the coil are interrupted or not well connected.
b) the contact of the contactor is not properly working.
17. AUX OUTPUT KO
The µP checks the driver of the electromechanical brake. If the status of the driver
output does not correspond to the signal coming from the µP, the allarm is signalled.
Replace the logic.
18. PEV NOT OK
The voltage of the "HM" output (Standard version) or the "PEV" output (MDI PRC
version) is not correct.
Possible cause:
a) output transistor is damaged.
b) defect in the logic
19. MDI COIL SHORTED
This failure is detected by MDI PRC and the information is sent to AC1 by Can-Bus
link. It means MDI PRC has detected a short-circuit on a coil of one of the On/Off
valves. Possible reasons:
a) the coil is really shorted or there is a wrong connection.
b) problem in MDI PRC hardware.
20. MDI VALVE DRIVER
This failure is detected by MDI PRC and the information is sent to AC1 by Can-Bus
link. It means that one of the On/Off valves driver is open.
21. MDI DRIVER SHORTED
This failure is detected by MDI PRC and the information is sent to AC1 by Can-Bus
link. It means that one of the On/Off valves driver is shorted. Possible reasons:
a) wrong external connection, check the wiring.
b) problem in MDI PRC hardware.
22. MDI NEG EVP
This failure is detected by MDI PRC and the information is sent to AC1 by Can-Bus
link. It means there is a problem on one of the two drivers of proportional valves.
23. MDI PEV
This failure is detected by MDI PRC and the information is sent to AC1 by Can-Bus
link. It means MDI PRC has detected a wrong value of the electrovalves positive.
Possible reasons:
a) wrong connection.
b) problem on AC1 PEV output.
c) problem in MDI PRC hardware.