6.9 Troubleshooting without Fault Display
YASKAWA ELECTRIC
SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
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6.9 Troubleshooting without Fault Display
This section describes troubleshooting problems that do not trip an alarm or fault.
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Cannot Change Parameter Settings
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Motor Does Not Rotate Properly after Pressing RUN Button or after Entering
External Run Command
■
Motor Does Not Rotate
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.
A multi-function contact input terminal is set to
allow or restrict parameter editing (H1-01 through
H1-06 = 1B).
• When the terminal is open, parameters cannot be edited.
• Turn on the multi-function contact input set to 1B.
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
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.
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
.
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 steps to solve the problem:
• Push the
button.
• If o2-01 is set to 0, then the LO/RE button will be disabled.
Auto-Tuning has just completed.
• When Auto-Tuning has completed, the drive is switched back to the Programming Mode. The Run
command will not be accepted unless the drive is in the Drive Mode.
• Use the LED operator to enter the Drive Mode.
Refer to The Drive and Programming Modes on page 78
.
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 Source 1).
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
3: Option card
One of the Safety Inputs is open.
• Check for a short-circuit between terminals H1 and HC.
• See if one of the Safety Inputs is open.
• Correct any faulty wiring.
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).
STOP