Hitachi SJ300-EL Series Instruction Manual Supplement page 46

Possible Problems You May Encounter
The following problems may be encountered during the autotuning procedure:
• Trip during auto-tuning – A trip event will cause the auto-tuning sequence to
quit. The display will show the error code for the trip rather than the abnormal
termination indication. After eliminating the cause of the trip, then conduct the
autotuning procedure again.
• Power loss or stop during auto-tuning – If the auto-tuning procedure is
interrupted by power loss, the Stop key, or by turning OFF the Run command, the
auto-tuning constants may or may not be stored in the inverter. It will be
necessary to restore the inverter's factory default settings (see "Restoring Factory
Default Settings" on page 6–9 of the SJ300 Inverter Instruction Manual). After
reinitializing the inverter, perform the entire auto-tuning procedure again.
• Control mode setting – The auto-tuning procedure will have an abnormal
termination if the control mode of the inverter is set to any of V/F settings.
Appendix A - Auto-tuning Procedure
46