8-18
8-2 Troubleshooting
Due to parameter setting errors, faulty wiring, and so on, the Inverter and
motor may not operate as expected when the system is started up. If that
should occur, use this section as a reference and apply the appropriate
measures.
Referto8-1 Protective and Diagnostic Functions,ifthecontentsofthefault
are displayed,
8-2-1 Parameters Fail Set
H The display does not change when the Increment or
Decrement Key is pressed.
·Parameter write-prohibit is input.
This occurs when n001 for parameter write-prohibit selection/parameter initializa-
tionissetto0.Setn001toanappropriatevalueaccordingtotheparametertobeset.
·The Inverter is operating.
There are some parameters that cannot be set during operation. Refer to the list of
parameters. Turn the Inverter OFF and then make the settings.
H “OPj” is displayed.
A parameter setting error hasoccurred. Refer to 8-1-2 Warning Detection (Nonfatal
Error) and make the necessary corrections.
H Nothing is displayed on the Digital Operator or “OPR” is
displayed.
A connection error has occurred in the Digital Operator.
TurnOFFtheInverteranddismounttheDigitalOperator.Aftercheckingthatthecon-
nector is free of any foreign material remount the Digital Operator.
8-2-2 Motor Fails to Operate
H The motor does not operate with input through the control
circuit terminals even though the frequency reference is
correct.
·The operation method setting is incorrect.
If parameter n003 for operation mode selection is not set to 1 to enable the control
circuit terminals, the RUN command cannot be executed through the control circuit
terminals.
Maintenance Operations Chapter 8
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