Troubleshooting
7-15
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 occurs, use this section as a reference and perform the appropriate
counter measures.
If the contents of the fault are displayed, refer to Protective and Diagnostic Functions.
îš‹ If Parameters Cannot Be Set
îš„The display does not change when the Increment and Decrement keys are pressed.
The following causes are possible.
The Inverter is operating (Drive Mode).
There are some parameters that cannot be set during operation. Turn off the RUN command and then make the
settings.
Parameter write enable is input.
This occurs when "Parameters write enable" (set value: 1B) is set for a multi-function digital input (H1-01 to
H1-05). If the parameter write enable input is OFF, the parameters cannot be changed. Turn it ON and then set
the parameters.
Passwords do not match. (Only when a password is set.)
If the parameter A1-04 (Password) and A1-05 (Password Setting) numbers are different, the parameters for
the initialize mode cannot be changed. Reset the password.
If you cannot remember the password, display A1-05 (Password Setting) by pressing the Shift/RESET key
and the MENU key simultaneously while in the A1-04 display. Then reset the password. (Input the reset pass-
word in parameter A1-04.)
îš„OPE01 through OPE11 is displayed.
The set value for the parameter is wrong. Refer to page 7-11, Operator Programming Errors in this chapter
and correct the setting.
îš„CPF00 or CPF01 is displayed.
This is a Digital Operator communications error. The connection between the Digital Operator and the
Inverter may be faulty. Remove the Digital Operator and then re-connect it.
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