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Errors during tuning
Improper tuning would negatively affect the operation performance and, in the worst case, could even cause
hunting or deteriorate precision. Therefore, if the inverter finds any abnormality in the results of the tuning or
any error in the process of the tuning, it will display
er7
and discard the tuning data.
Listed below are the abnormal or error conditions that can be recognized during tuning.
Abnormal/error condition Description
Abnormal result of tuning
An inter-phase imbalance has been detected;
Tuning has resulted in an abnormally high or low value of a parameter.
Abnormal output current
An abnormally high current has been caused during tuning.
Sequence error
This will occur during tuning if the run command/EN terminal
input/forced-to-decelerate terminal command DRS turns off, or the
coast-to-stop terminal command BX turns on, where status of DRS and BX is
expressed in normal logic.
Limitation exceeded
During tuning, a certain limitation has been reached or exceeded;
The maximum output frequency or the peak limiter for output frequency has
been reached or exceeded.
Other alarm condition
An undervoltage or an alarm has been occurred.
If any of these conditions has occurred, either eliminate the abnormal or error factor(s) and perform tuning
again, or contact your Fuji Electric representative.
Tuning offset angle of the magnet pole
Before to proceed to running a synchronous motor, be sure to tune offset angle of the magnet pole. For the
tuning procedure, refer to the instruction manual of the option card.
To apply a synchronous motor, use the option card in a separate ordering. For details, refer to the
instruction manual of the option card.
Running a synchronous motor without tuning of the offset angle may result in an unexpected operation.
An accident or injuries could occur.
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