Troubleshooting |
General Faults and Alarms
Faults and Alarms indicate unsusal inverter / application conditions.
An alarm does not necessarily switch off the inverter but a message is displayed on the keypad (i.e. a flashing alarm code) and an alarm output can be generated at the
A fault switches the inverter output off immediately, a message is displayed on the keypad and the fault output is switched. The fault must be reset manually after the cause and the RUN signal have been removed.
The following table shows a list of faults and alarms with their corrective actions.
Display | Alarm | Fault | Meaning |
| Corrective Actions |
BUS | |
| Option Card Communication Alarm | Check the connections and all | |
| After initial communication was established, the | ||||
Option Com Err |
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| connection was lost. | ware configurations. | |
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| Control Fault |
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CF |
| | A torque limit was reached continuously for 3 | Check the motor parameters | |
Out of Control |
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| seconds or longer during a deceleration stop in |
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| Open Loop Vector control |
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CPF00 |
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| • Disconnect the Digital Operator and then | |
COM- |
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| Digital Operator Communication Fault 1/2 | ||
ERR(OP&INV) |
| | • Communication fault between Operator and |
| connect it again. |
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CPF01 |
| Inverter | • Cycle the Inverter power supply. | ||
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COM- |
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| • CPU External RAM Fault | • | Replace the Inverter. |
ERR(OP&INV) |
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CPF02 |
| | CPF02 Fault |
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BB Circuit Err |
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| Baseblock circuit error | • Perform an initialization to factory defaults. | |
CPF03 |
| | CPF03 | ||
| • Cycle the Inverter power supply. | ||||
EEPROM Error |
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| EEPROM error | • | Replace the Inverter. |
CPF04 |
| | CPF04 |
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INternal A/D Err |
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| CPU Internal A/D Converter Fault |
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| • | Reduce the load. | |
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| | The speed deviation has been greater than the | • Lengthen the acceleration and deceleration | |
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| setting in |
| time | |
DEV |
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| • Check the mechanical system | ||
Speed Deviation |
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| • Check the settings of | |
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| The speed deviation has been greater than the | • Check the sequence and if the brake is | |
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| setting in |
| opened when the inverter starts to increase | |
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| the speed. | |
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| Forward/Reverse Run Commands Input |
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EF | |
| Together | Check external sequence logic, so that only | |
External Fault |
| Both the forward and the reverse run commands | |||
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| are input simultaneously for 500ms or more. | one input is activated at a time. | |
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| This alarm stops the motor. |
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EF0 |
| | External fault input from Communications | • Check for an external fault condition. | |
| • | Verify the parameters. | |||
Opt External Flt |
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| Option Card | • | Verify communication signals |
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EFx | | | External fault at terminal Sx (x stands for termi- | Eliminate the cause of the external fault con- | |
Ext Fault Sx |
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| nals S3 to S7) | dition. | |
Ext Run Active | |
| Detected after a fault when a RESET command | Remove the RUN signal first and reset the | |
Cannot Reset |
| is input while the RUN command is still active | error. | ||
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| • Remove the motor and run the Inverter | |
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| without the motor. |
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| Ground Fault | • Check the motor for a phase to ground | |
GF |
| | The ground current at the Inverter output |
| short. |
Ground Fault |
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| exceeded 50% of the Inverter rated output cur- | • Check the output current with a clampmeter | |
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| rent and |
| to verify the DCCT reading. |
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| • Check the control sequence for wrong | |
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| motor contactor signals. |
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