Troubleshooting Without Fault Display; The Parameter Settings Will Not Change; The Motor Does Not Rotate After Entering Run Command - YASKAWA GA700 Technical Manual

6.10

Troubleshooting Without Fault Display

If the drive or motor operate incorrectly, but the keypad does not show a fault or error code, refer to the items this
section.
• Motor hunting and oscillation
• Unsatisfactory motor torque
• Unsatisfactory speed precision
• Unsatisfactory motor torque and speed response
• Motor noise
◆

The Parameter Settings Will Not Change

Causes
The drive is operating the motor (the drive is in Drive
Mode).
Parameter A1-01 = 0 [Access Level Selection = Operation
Only].
Parameter H1-xx = 1B [MFDI Function Select =
Programming Lockout].
An incorrect password was entered in A1-04 [Password].
The drive detected Uv [Undervoltage].
◆

The Motor Does Not Rotate After Entering Run Command

Causes
The drive is not in Drive Mode.
The drive stopped, was pushed, and changed the Run
command source to the keypad.
Auto-Tuning completed.
The drive received a fast stop command.
The settings for the source that supplies the Run command
are incorrect.
The frequency reference source is set incorrectly.
There is defective wiring in the control circuit terminals.
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual

6.10 Troubleshooting Without Fault Display

Possible Solutions
Stop the drive and change to Programming Mode.
Set A1-01 = 2 [Access Level Selection = Advanced Level] or A1-01 = 3
[Expert Level].
Turn ON the terminals to which H1-xx = 1B is set, and then change the
parameters.
• Enter the correct password to A1-04 again.
• If you forgot the password, set the password again with A1-04 and A1-05
[Password Setting].
Note:
If the password is set, it will not be possible to change these parameters
until the password matches:
• A1-01 [Access Level Selection]
• A1-02 [Control Method Selection]
• A1-03 [Initialize Parameters]
• A1-06 [Application Preset]
• A1-07 [DriveWorksEZ Function Selection]
• A2-01 to A2-32 [User Parameter 1 to User Parameter 32]
• View U1-07 [DC Bus Voltage] to see the power supply voltage.
• Examine the main circuit wiring.
Possible Solutions
1. Make sure that the keypad shows [Rdy].
2. If the keypad does not show [Rdy], go back to the Home screen.
Do one of these two:
• Push .
• Re-energize the drive.
Note:
Set o2-01 = 0 [LO/RE Key Function Selection = Disabled] to prevent
changing the Run command source with
Go back to the Home screen on the keypad.
Note:
When Auto-Tuning completes, the drive changes to Programming Mode.
The drive will not accept a Run command unless the drive is in Drive
Mode.
Turn off the fast stop input signal.
Set b1-02 [Run Command Selection 1] correctly.
Set b1-01 [Frequency Reference Selection 1] correctly.
• Correctly wire the drive control circuit terminals.
• View U1-10 [Input Terminal Status] for input terminal status.
.
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