Fault Screen Display |
| Possible Causes |
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Control Power Undervoltage | • | This fault is caused by an undervoltage condition at the 5, 15, or the 24 VDC |
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CPU Fault | • | CPU malfunction. |
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DC Bus Undervoltage | • | |
| • | Defective control board. |
| • Excessive load on the power supply. | |
| • Undervoltage/Ridethrough settings require adjustment. | |
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DC Fuse Open | • | Internal DC bus fuse is open. |
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Note: | The event that caused the Trip(s) must be corrected or must decrease to less than the threshold | ||
| value required to cause the trip to allow for a Reset to be recognized. In the event of multiple | ||
| active trips, the trip displayed will remain until all faults are corrected and all trips are cleared. | ||
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Dynamic Braking Resistor Overcurrent | • ASD inability to discharge the bus voltage during regeneration. | ||
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| • No dynamic braking resistor (DBR) installed. | |
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| • Deceleration time is too short. | |
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| • Improper DBR setup information. | |
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| • Defective IGBT7 (or IGBT7 ckt.). | |
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Dynamic Braking Resistor Overload | • Deceleration time is too short. | ||
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| • DBR setting adjustment required. | |
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| • Overvoltage Stall setting adjustment required. | |
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Earth Fault |
| • Ground fault at the motor. | |
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| • Ground fault at the output of the ASD. | |
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| • Current leakage to Earth Ground. | |
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EEPROM Data Fault | • | Internal EEPROM malfunction. | |
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EEPROM Fault |
| • | EEPROM write malfunction. |
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Emergency Off |
| • Emergency Off command received via EOI or remotely. | |
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Encoder Loss |
| • Encoder signal missing while running during | |
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Flash Memory Fault |
| • | Flash memory malfunction. |
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Gate Array Fault |
| • Defective Gate Array or Gate Array malfunction. | |
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Input Phase Loss |
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Load Drooping |
| • Load requirement is in excess of the capabilities of the motor. | |
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Load End Short Circuit | • Improper wiring at the ASD output to the motor. | ||
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Low Current |
| • Improper Low Current detection level setting. | |
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Main Board EEPROM Fault | • | Internal EEPROM malfunction. | |
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G7 ASD Operation Manual | 177 |
