Zapi COMBI ACE0 User Manual page 63

B) The driver circuit is damaged in the controller, which has to be replaced.
C) The wires to the LC coil are interrupted or not connected, so check the
7) "CONTACTOR DRIVER"
Cause:
The LC coil driver is not able to drive the load. The device itself or its driving
circuit is damaged.
Troubleshooting:
This type of fault is not related to external components; replace the controller.
8) "CONTACTOR OPEN"
Cause:
The main contactor coil has been driven by the controller, but the contactor
does not close.
Troubleshooting:
It could be also a problem of the contact in the LC that is not working (does
not pull-in), try replacing the LC.
9) "CONTACTOR CLOSED"
Cause:
Before driving the LC coil, the controller checks if the contactor is stuck. The
controller drives the bridge for some tens milliseconds, trying to discharge the
capacitors bank. If they don't discharge the fault condition is entered.
Troubleshooting:
It is suggested to verify the power contacts of LC; to replace the LC is
necessary.
10) "AUX DRIVER SHORTED"
Cause:
The driver of the electromechanical brake coil is shorted.
Troubleshooting:
A) Check if there is a short or a low impedance pull-down between NEB
B) The driver circuit is damaged in the controller, which has to be replaced.
11) "AUX DRIVER OPEN"
Cause:
The driver of the electromechanical brake coil is not able to drive the load.
Troubleshooting:
Replace the controller.
12) "POS EB SHORTED"
Cause:
The output of the built in Smart Driver, which supplies the positive to the
Electromechanical brake coil is high when the Tiller and the H&S switch are
open.
Troubleshooting:
A) It is suggested to check the harness, in order to verify if a positive is
B) If, even disconnecting the wire from the connector pin, the output stays at
AF6ZP0AL - COMBIAC0 & ACE0 - User Manual
CNA#12 and –BATT.
coil related harness.
CNA#4 and –BATT.
connected to the Smart driver output CNA#2.
high value, the problem is inside the controller and the Smart Driver is
probably shorted.
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