6.8 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 (A1-01 = 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 62.
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 operator
1: Control circuit terminal (default setting)
2: MEMOBUS/Modbus communications
There is faulty wiring in the
control circuit terminals.
• Check the wiring for the control terminal.
•
Correct wiring mistakes.
• Check the input terminal status monitor (U1-10).
The drive has been set to accept
the frequency reference from the
incorrect source.
Check parameter b1-01 (Frequency Reference Selection 1).
Set b1-01 to the correct source of the frequency reference.
0: LED operator
1: Control circuit terminal (default setting)
2: MEMOBUS/Modbus communications
3: Potentiometer (option)
The terminal set to accept the
main speed reference is set to the
incorrect voltage and/or current.
Check DIP switch S1. Next assign the correct input level to terminal A1 (H3-01).
Refer to DIP Switch S1 Analog Input Signal Selection on page 49.
Selection for the sink/source
mode is incorrect.
Check DIP switch S3. Refer to Sinking/Sourcing Mode Switch on page 47.
Frequency reference is too low.
• Check the frequency reference monitor (U1-01).
• Increase the frequency by changing the maximum output frequency (E1-09).
6.8 Troubleshooting without Fault Display
YASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manual
147
6
Troubleshooting
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