Emerson 400501-05 Invalid Configuration, Drive Overtemp, Power Module, High DC Bus, Low DC Bus

Epsilon Eb Digital Servo Drive Installation Manual

Invalid Configuration

Epsilon Only

This fault will occur if the digital board in the drive does not match the power board settings. It is only useful during manufacturing. A drive with this fault should be returned for service.

Drive Overtemp

Indicates the drive IGBT temperature has reached 100° C.

Power Module

This fault is generated when a power stage over-temperature, over-current or loss of power stage logic supply occurs. This can be the result of a motor short to ground, a short in the motor windings, a motor cable short or the failure of a switching transistor.

It can also occur if the drive enable input is cycled “Off” and “On” rapidly (>10 Hz).

This fault should not be allowed to occur repeatedly. System changes should be made to eliminate Z fault events. Drive power stage will become degraded if allowed to continue.

Note

If a cause for Z faults cannot be determined, write down all observations prior to and after the Z faults and contact Control Techniques Technical Support.

High DC Bus

This fault will occur whenever the voltage on the DC bus exceeds 415 VDC. The most likely cause of this fault would be an open external shunt fuse, a high AC line condition or an application that requires an external shunt (e.g., a large load with rapid deceleration).

	High DC Bus Threshold	Low DC Bus Treshold
E Series	440	96
Epsilon	415	60

Low DC Bus

This fault will occur whenever the voltage on the DC bus drops below 60 volts. The most likely cause of this fault is a reduction (or loss) of AC power. A 50 ms debounce time is used with this fault to avoid faults caused by intermittent power disruption. With and Epsilon drive, the low DC bus monitoring can be disabled with PowerTools software in the Advanced tab.

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