7
-12
Troubleshooting
Due to constant 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
.
If Constants Cannot Be Set
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 constants that cannot be set during operation. Turn off the RUN command and then make the
settings.
Constant write enable is input.
This occurs when "constant write enable" (set value: 1B) is set for a multi-function input terminal (H1-01 to
H1-05). If the constant write enable input is OFF, the constants cannot be changed. Turn it ON and then set the
constants.
Passwords do not match. (Only when a password is set.)
If the constant A1-04 (Password) and A1-05 (Password Setting) numbers are different, the constants for the
initialize mode cannot be changed. Reset the password.
If you cannot remember the password, display A1-05 (Password Setting) by pressing the Reset key and the
Menu key simultaneously while in the A1-04 display. Then reset the password. (Input the reset password in
constant A1-04.)
OPE01 through OPE11 is displayed.
The set value for the constant is wrong. Refer to
Operation Errors
in this chapter and correct the setting.
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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