5.8 Troubleshooting without Fault Display
This section describes troubleshooting problems that do not trip an alarm or fault.
u
Cannot Change Parameter Settings
Cause Possible Solutions
The drive is running the motor (i.e., the Run
command is present).
• Stop the drive and switch over to the Programming Mode.
• Most parameters cannot be edited during run.
The Access Level is set to restrict access to
parameter settings.
• Set the Access Level to allow parameters to be edited (A1-02 = 2).
The operator is not in the Parameter Setup
Mode (the LED screen will display “PAr”).
• See what mode the LED parameter is current set for.
• Parameters cannot be edited when in the
Setup Mode (“STUP”). Switch
modes so that “PAr” appears on the screen.
The wrong password was entered.
• If the password entered to A1-04 does not match the password saved to
A1-05, then drive settings cannot be changed.
• Reset the password.
If you cannot remember the password:
•
Display parameter A1-04. Press the
STOP
button while pressing
at the same time. Parameter A1-05 will appear.
• Set a new password to parameter A1-05.
Undervoltage was detected.
• Check the drive input power voltage by looking at the DC bus voltage
(U1-07).
• Check all main circuit wiring.
u
Motor Does Not Rotate Properly after Pressing RUN Button
or after Entering External Run Command
n
Motor Does Not Rotate
Cause Possible Solutions
The drive is not in the Drive Mode.
• Check if the DRV light on the LED operator is lit.
• Enter the Drive Mode to begin operating the motor. Refer to The Drive
and Programming Modes on page 78.
The button was pushed.
Stop the drive and check if the correct frequency reference source is selected.
If the operator keypad shall be the source, the LO/RE button LED must be
on, if the source is REMOTE, it must be off.
Take the following step to solve the problem:
•
Push the button.
A Fast-Stop was executed and has not yet
been reset.
Reset the Fast-Stop command.
Settings are incorrect for the source that
provides the run command.
Check parameter b1-02 (Run Command Selection).
Set b1-02 so that it corresponds with the correct run command source.
0: LED/LCD operator
1: Control circuit terminal (default setting)
2: MEMOBUS/Modbus communications
5.8 Troubleshooting without Fault Display
YASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual
143
5
Troubleshooting
2/6/2008-14:44
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