Yaskawa Matrix Converter - Manual (Page 339)

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Troubleshooting
Due to parameter setting errors, faulty wiring, and so on, the MxC and motor may not operate as expected
when the system is started up. Use this section as a reference to take the appropriate action if such prob-
lems occur.
If the contents of the fault are displayed on the digital operator, then refer to Protective and Diagnostic
Functions.
‹ Trouble Setting Parameters
Use the following information if any MxC parameters cannot be set.
„ The display does not change when the up and down arrow keys are pressed.
The following causes are possible.
The MxC is operating (Drive Mode).
There are some parameters that cannot be set during while the motor is running. Stop the MxC to change the
setting values in such parameters, and then re-enter the Run Command.
“Parameter write enable” is input.
This occurs when “parameter write enable” (set value: 1B) is set for a multi-function digital input terminal
(H1-01 to H1-10). 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.
Occurs only when the password is set. If the parameter A1-04 (Password 1) and A1-05 (Password 2) 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 2) by pressing the RESET/SELECT key and
the MENU key simultaneously while in the A1-04 display. Then reset the password (input the reset password
in parameter A1-04.
„ OPE01 through OPE11 is displayed.
The set value for the parameter 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 MxC may
be faulty. Remove the digital operator and then re-install it.