EP Equipment LIST JX0, Руководство по обслуживанию, Страница: 143 / 206

REV. 07/2019
ELECTRICAL SYSTEM
8
130
Error Message
Possible cause Fault elimination
Error
Error text
31 VMN HIGH
"Before switching the LC on, the
software checks the power bridge:
it turns on alternatively the low-side
power MOSFETs and expects the
phase voltages
decrease down to -B. If the phase
voltages are higher than a certain
percentage of the nominal battery
voltage, this alarm occurs.
This alarm may also occur
when the start-up diagnosis has
succeeded and so the LC has been
closed. In this condition, the phase
voltages are expected to be lower
than half the battery voltage. If one
of them is higher
than that value, this alarm occurs."
"A）If the problem occurs
at start-up (the LC does not
close), check:
- motor internal connections
(ohmic continuity);
- motor power cables
connections;
- if the motor connections
are OK, the problem
is inside the controller.
Replace it.
B) If the alarm occurs while
the motor is running, check:
- motor connections;
- that the LC power contact
closes properly, with a good
contact;
- if no problem is found,
the problem is inside the
controller. Replace it."
38 CONTACTOR OPEN
The LC coil is driven by the
controller, but it seems that the
power contacts do not close. In
order to detect this condition the
controller injects a DC current into
the motor and checks the voltage
on power capacitor. If the power
capacitors get discharged it means
that the main contactor is open.
LC contacts are not working.
Replace the LC.
52 PUMP I=0 EVER
In standby, the sensor detects a
current value different from zero.
"The current sensor or the
current feedback circuit is
damaged. Replace the
controller."