Hitachi SJ Series, User Manual

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18-41
Chapter 18
Tips/FAQ/Troubleshooting
*
Also, see “18.5.1 Checking the warning display”.
S3: The motor
doesn’t rotate
although an
operation
command was
entered.
• A shutoff function is at work.
• When the inverter trips due to an error, you need to remove
the error factor and reset the inverter.
• See “18.5. Troubleshooting for Protection-function Related
Errors” in this chapter.
• The inverter is tripping.
• The function safety terminal, terminal function [RS], or [FRS]
terminal may be enabled, or [ROK] terminal may be disabled.

Proceed to S6.
• The frequency command destination may be wrong, or the
frequency command may be 0.

Proceed to S5.
• The frequency command
destination isn’t entered.
• A limit function is at work.
• The command direction may be limited by the rotation
direction limit function.

Proceed to S7.
• The operation command destination may be wrong, or the
operation command may not be accepted.

Proceed to S4.
• The operation command isn’t
entered.
• If a warning is issued, you need to eliminate the data
inconsistency.
• See “18.4. Troubleshooting for Warning-function Related
Errors” in this chapter.
• A warning is issued.
• Motor is locked.
• If the motor shaft is locked by something which hinders the
brake or the motor revolution (e.g., clogging), the cause
needs to be removed.
• Wiring or the like is
disconnected.
• Check for abnormalities such as disconnection of the output
line to the motor or disconnection within the motor.
Occurrence

Estimated cause(s)

Exemplar measures to be taken