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Code
Code
Alarm
Alarm
31
VMN HIGH
Pump
Pump
EPS
EPS
Traction
Traction
(P)
(P)
(E)
(E)
(T)
(T)
Cause 1 :
Before switching the LC on, the software checks the
power bridge: it turns on alternatingly the Low side
Power Mosfets and expects the phases voltage to
decrease down to -BATT. If the phases voltage do not
decrease, this alarm occurs.
Cause 2 :
This alarm may occur also when the start up diagnosis is
overcome, and so the LC is closed. In this condition, the
phases' voltages are expected to be lower than 1/2
Vbatt. If it is higher than that value, fault status is entered.
Troubleshooting :
A)
If the problem occurs at start up (the LC does not
close at all), check :
-
Motor internal connections (ohmic continuity)
-
Motor power cables connections
-
If the motor connection are OK, the problem is
inside the controller
B)
If the problem occurs after closing the LC (the LC
closed and then opens back again), check :
Motor connections
-
-
If motor phases windings/cables have leakages
towards truck frame
-
If no problem are found on the motors, the problem
is inside the controller
Cause 1 :
Before switching the LC on, the software checks the
power bridge : it turns on alternatingly the Low side
Power Mosfets and expects the phases voltage to
decrease down to -BATT. If the phases voltage is higher
than 10% of nominal battery voltage, this alarm occurs.
Cause 2 :
This alarm may occur also when the start up diagnosis is
overcome, and so the LC is closed. In this condition, the
phases' voltages are expected to be lower than 1/2
Vbatt. If it is higher than that value, fault status is entered.
Troubleshooting :
A)
If the problem occurs at start up (the LC does not
close at all), check :
-
Motor internal connections (ohmic continuity)
-
Motor power cables connections
-
If the motor connection are OK, the problem is
inside the controller, replace it.
B)
If the problem occurs after closing the LC (the LC
closed and then opens back again), check :
-
Motor connections
-
If motor phases windings/cables have leakages
towards truck frame
-
If no problem are found on the motors, the problem
is inside the controller, replace it.
7-71
Description
Description
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