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Code
Code
Alarm
Alarm
19
LOGIC
FAILURE #1
Pump
Pump
EPS
EPS
Traction
Traction
(P)
(P)
(E)
(E)
(T)
(T)
Description
Description
Cause :
This fault is displayed when the controller detects an
over voltage or under voltage condition. Over voltage
threshold is 45V, under voltage threshold is 9V in the
24V controller. In 48V controller over voltage threshold is
65V, under voltage threshold is 11V.
Troubleshooting :
Troubleshooting of fault displayed at start-up or in
standby; in these cases it is very likely the fault is due to
an under voltage, so it is suggested to check :
Key input signal down-going pulses (below under
A)
voltage threshold) due to external loads, like DC/DC
converters starting-up, relays or contactor switching,
solenoids energizing / de-energizing.
Check the connection of power cables to the battery
B)
terminal, positive and negative, to MC and to
controller +Batt and .Batt, which must be screwed
with a torque comprised in the range 13Nm
C)
If no voltage transient is detected on the supply line
and the alarm is present every time the key is
switched ON, the failure is probably in the controller
hardware, so it is necessary to replace the logic
board.
Troubleshooting of fault displayed during motor
driving; in this case it can be an under voltage or an
over voltage condition.
D)
If the alarm happens during traction acceleration or
driving hydraulic functions, it is very likely it is an
under voltage condition; check battery charge
condition, power cable connection.
E)
If the alarm happens during release braking, it is very
likely it is due to over voltage condition; check line
contactor contact, battery power cable connection.
This alarm occurs when the real voltage between
phases W and U of the motor is different from the
desired. It is necessary to replace the controller.
7-69
15Nm.
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