PBV20N2 PBV20N2 Service Service ManualManual
CODE
CODE TRUCKTOOL TRUCKTOOL AND AND DISPLAY DISPLAY DESCRIPTIONDESCRIPTION
2929 Pump motor output voltage error (high)Pump motor output voltage error (high)
PUMP VMN HIGHPUMP VMN HIGH
(Alarm) Stored(Alarm) Stored
This test is carried out when This test is carried out when the pump motor is turning. The the pump motor is turning. The alarm indicates that the pumpalarm indicates that the pump
motor output is higher than motor output is higher than expected.expected.
In such a case, check the following:In such a case, check the following:
•
•
Motor connectionsMotor connections
•
• If the motor windings or cables have leakages toIf the motor windings or cables have leakages towards the truck framewards the truck frame
If no problems are found If no problems are found on the motor, the problem is on the motor, the problem is in the COMBIAX controller.in the COMBIAX controller.
3030
Traction motor output voltage errorTraction motor output voltage error
(low)(low)
VMN LOWVMN LOW
(Alarm) Stored(Alarm) Stored
Cause 1: Startup testCause 1: Startup test
Before switching the main contactor on, the Before switching the main contactor on, the software checks the power bridge. It turns the highsoftware checks the power bridge. It turns the high
side power mosfets on one by one side power mosfets on one by one and expects the phase voltage to and expects the phase voltage to increase toward the railincrease toward the rail
capacitor value. If the phase voltage does capacitor value. If the phase voltage does not increase, this alarm occurs.not increase, this alarm occurs.
In such a case (the main contactor does not In such a case (the main contactor does not close at all), check the following:close at all), check the following:
•
•
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: Motor running testCause 2: Motor running test
When the motor is running and the power bridge is on, the motor voltage feedback is tested. IfWhen the motor is running and the power bridge is on, the motor voltage feedback is tested. If
the motor voltage feedback is lower than the motor voltage feedback is lower than commanded value, this alarm occurs.commanded value, this alarm occurs.
In such a case, check the following:In such a case, 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 contact.good 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.
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