PBV20N2 PBV20N2 Service Service ManualManual
CODE
CODE TRUCKTOOL TRUCKTOOL AND AND DISPLAY DISPLAY DESCRIPTIONDESCRIPTION
1919 Over or under voltage detectedOver or under voltage detected
LOGIC FAILURE #1LOGIC FAILURE #1
(Alarm) Stored(Alarm) Stored
This alarm is displayed when the controller detects an This alarm is displayed when the controller detects an overvoltage or undervoltage condition.overvoltage or undervoltage condition.
The overvoltage threshold is 35 V and the undervoltage threshold is 9.5 V in the 24V controller.The overvoltage threshold is 35 V and the undervoltage threshold is 9.5 V in the 24V controller.
If the alarm is displayed at startup or in the standby mode, it is due to an undervoltage. In suchIf the alarm is displayed at startup or in the standby mode, it is due to an undervoltage. In such
a case, check the following:a case, check the following:
•
•
The key input signal voltage drops below thThe key input signal voltage drops below the undervoltage threshold due external loads,e undervoltage threshold due external loads,
such as DC/DC converters starting up or relays or contactors energizing or de-energizing.such as DC/DC converters starting up or relays or contactors energizing or de-energizing.
•
•
If no voltage transient is detected on If no voltage transient is detected on the supply line and the the supply line and the alarm is displayed every timealarm is displayed every time
the key is switched ON, the problem is in the key is switched ON, the problem is in the COMBIACX controller.the COMBIACX controller.
If fault is displayed during motor driving, it is due to an undervoltage or an overvoltageIf fault is displayed during motor driving, it is due to an undervoltage or an overvoltage
condition.condition.
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•
If the alarm occurs during traction acceleration or driving hydraulic functions, it If the alarm occurs during traction acceleration or driving hydraulic functions, it is caused byis caused by
an undervoltage condition. In such a case, check the an undervoltage condition. In such a case, check the battery charge level and the powerbattery charge level and the power
cable connections.cable connections.
•
•
If the alarm occurs during release braking, it If the alarm occurs during release braking, it is caused by an overvoltage condition. In suchis caused by an overvoltage condition. In such
a case, check the line contactor tips and the a case, check the line contactor tips and the battery power cable connections.battery power cable connections.
In some cases, this error can also happen during In some cases, this error can also happen during normal operation. Sharp hits may cause thenormal operation. Sharp hits may cause the
emergency stop switch contacts to open for a short period emergency stop switch contacts to open for a short period of time. This causes a short 0 of time. This causes a short 0 VV
pulse to the key line causing this error.pulse to the key line causing this error.
2828
Pump motor output voltage error (low)Pump motor output voltage error (low)
PUMP VMN LOWPUMP VMN LOW
(Alarm) Stored(Alarm) Stored
Cause 1: Startup testCause 1: Startup test
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 on theIt turns on the
high side power mosfets one by one high side power mosfets 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:
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•
Motor internal connections (ohmic continuity)Motor internal connections (ohmic continuity)
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• Motor power connectionsMotor power connections
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•
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 the commanded value, this alarm occurs.the commanded value, this alarm occurs.
In such a case, check the following:In such a case, check the following:
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• Motor connectionsMotor connections
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• Whether the motor’s phase windings or cables have leakages towards the Whether the motor’s phase windings or cables have leakages towards the truck frametruck frame
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•
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.
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