5-9
5-2 Troubleshooting
If the Inverter or motor does not operate properly when the system is
started, constant settings or wiring may be incorrect. In this case, take the
appropriate action as described below. (If an error code is displayed, refer
to 5-1 Protective and Diagnostic Functions.)
5-2-1 Constants Fail to Set
H err is Displayed in the Data Display Section.
•If an attempt is made to set a value outside the allowable range, err is displayed in the
data display section. The value is canceled and the data display section redisplays the
original value. For example, this error occurs when:
S An attempt is made to set a reference frequency value higher than the maximum
frequency value.
S The relationship among the constants set in n29 for the minimum output frequency,
n27 for the intermediate output frequency, n26 for the maximum voltage frequency,
and n24 for the maximum frequency are not correct.
S The relationship among jump frequencies 1 to 3 determined with the constants set
in n56 to n58 is not correct.
Check the setting range, then set the constant correctly.
H The Display Does Not Change when the Increment or
Decrement Key is Pressed.
•Value “0” is set in n01 (constant write-inhibit selection)
Set “1” in n01.
•The Digital Operator is not connected properly.
Turn the power off. After all indicators on the front panel go off, remove the Digital
Operator, then reinstall it.
5-2-2 Motor Fails to Operate
H The Motor Does Not Operate when the RUN Key on the Digital
Operator is Pressed.
•Operation mode was not selected correctly.
If “1,” “3,” or “5” is set in n02, the motor does not operate when the RUN Key on the
Digital Operator is pressed.
Always set “0,” “2,” or “4” in n02.
Operation Chapter 5
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