PBV20N2 PBV20N2 Service Service ManualManual
CODE
CODE TRUCKTOOL TRUCKTOOL AND AND DISPLAY DISPLAY DESCRIPTIONDESCRIPTION
3131 Traction motor output voltage errorTraction motor output voltage error
(high)(high)
VMN HIGHVMN HIGH
(Alarm) Stored(Alarm) Stored
Cause 1:Cause 1:
Before switching the main contactor on, the software checks the power bridge. Before switching the main contactor on, the software checks the power bridge. It turns the lowIt turns the low
side and high side pside and high side power mosfets on one by one and ower mosfets on one by one and expects the phase voltage to decreaseexpects the phase voltage to decrease
down to –Batt. If down to –Batt. If the phase voltage does not decrease, this alarm occurs.the phase voltage does not decrease, this alarm occurs.
In such a case (the main contactor does nIn such a case (the main contactor does not close at all), check the fot close at all), check the following:ollowing:
•
• Motor internal connections (ohmic continuity)Motor internal connections (ohmic continuity)
•
•
Motor power connectionsMotor power connections
•
•
Motor leakage to the truck frameMotor leakage to the truck frame
If the motor connections are OK, the If the motor connections are OK, the problem is in the COMBIACX controller.problem is in the COMBIACX controller.
Cause 2:Cause 2:
This alarm may also occur when the startup diagnosis has been This alarm may also occur when the startup diagnosis has been completed and the maincompleted and the main
contactor is closed. In this case, the phase voltage contactor is closed. In this case, the phase voltage is expected to be lower than is expected to be lower than 50% of the50% of the
battery voltage. If it battery voltage. If it is higher than this value, this is higher than this value, this alarm occurs.alarm occurs.
In such a case (the main contactor closes and In such a case (the main contactor closes and then opens again), check the following:then opens again), check the following:
••
Motor connectionsMotor connections
•
•
Whether the motor’s phase windings or cables have leakages towards the tWhether the motor’s phase windings or cables have leakages towards the truck frameruck frame
•• That the main contactor closes properly, with a That the main contactor closes properly, with a good contactgood contact
If no faults are If no faults are found, the problem is in found, the problem is in the COMBIACX controller.the COMBIACX controller.
3737 Contactor is stuck closedContactor is stuck closed
CONTACTOR CLOSEDCONTACTOR CLOSED
(Alarm) Stored(Alarm) Stored
Before driving the main contactor coil, the Before driving the main contactor coil, the controller checks that the contactor is not stuckcontroller checks that the contactor is not stuck
(closed). The controller drives the mosfets for some milliseconds, trying to discharge the(closed). The controller drives the mosfets for some milliseconds, trying to discharge the
capacitor bank. If the contactor is stuck, this alarm occurs.capacitor bank. If the contactor is stuck, this alarm occurs.
In such a case, check the main contactor tips. In such a case, check the main contactor tips. If needed, replace the main contactor.If needed, replace the main contactor.
3838
Contactor does not close circuitContactor does not close circuit
CONTACTOR OPENCONTACTOR OPEN
(Alarm) Stored(Alarm) Stored
This alarm occurs if the main contactor has been This alarm occurs if the main contactor has been driven by the controller, but the driven by the controller, but the contactorcontactor
does not close.does not close.
In such a case, check that the In such a case, check that the wires to the main contactor coil are wires to the main contactor coil are not interrupted ornot interrupted or
disconnected.disconnected.
The alarm can also be caused by a fault in the main contactor itself. If needed, replace theThe alarm can also be caused by a fault in the main contactor itself. If needed, replace the
contactor.contactor.
5252 Pump current 0A while pump runningPump current 0A while pump running
PUMP I=0 EVERPUMP I=0 EVER
(Warning) Stored(Warning) Stored
This test is carried out when This test is carried out when the pump motor is running, and the pump motor is running, and it verifies that the current feedbackit verifies that the current feedback
sensor is not constantly stuck to 0.sensor is not constantly stuck to 0.
If this warning is displayed, check that tIf this warning is displayed, check that the motor connection has continuity. If the motorhe motor connection has continuity. If the motor
connection is opened, the current cannot floconnection is opened, the current cannot flow, so the test fails and w, so the test fails and the warning is displayed.the warning is displayed.
If the motor circuit is OK, If the motor circuit is OK, the problem can be in tthe problem can be in the current sensor. In this case, replace thehe current sensor. In this case, replace the
COMBIACX controller.COMBIACX controller.
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