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Code
Alarm
32
VMN NOT OK
37
CONTACTOR
CLOSED
38
CONTACTOR
OPEN
48
MAIN
CONT.OPEN
Traction
Pump
EPS
(P)
(E)
(T)
This alarm occurs in the initial rest state after key on if
the outputs of the motor voltage amplifiers are not in the
window from 2.2 to 2.8 Vdc. It is necessary to replace
the controller.
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.
Cause :
Before driving the MC 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 the capacitor voltage does decrease
by 20% of the key voltage the alarm is generated.
Troubleshooting :
It is suggested to verify the power contacts of LC; to
replace the LC is necessary.
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.
Cause :
The main contactor coil has been driven by the
controller, but the contactor does not close.
Troubleshooting :
A)
It could be a problem of the contacts in the MC that
are not working (does not pull-in), try replacing the
MC.
B)
If the contactors of MC are working correctly than the
problem is in the controller, replace it.
This alarm occurs only when the setting CAN BUS is
PRESENT. Then the EPS-AC0 waits for a via CAN
information that the traction controller has closed the
main contactor. If this information lacks more than about
1.5 secs, this alarm occurs. Find, on the traction
controller, the reason for keeping the main contactor
open.
7-72
Description
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