YASKAWA GA700 - Troubleshooting Without Fault Display; The Parameter Settings will Not Change; The Motor Does Not Rotate after Entering Run Command

Troubleshooting
6
6.10 Troubleshooting Without Fault Display
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 389
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 Possible Solutions
The drive is operating the motor (the drive is in Drive
Mode).
Stop the drive and change to Programming Mode.
Parameter A1-01 = 0 [Access Level Selection = Operation
Only].
Set A1-01 = 2 [Access Level Selection = Advanced Level] or A1-01 = 3
[Expert Level].
Parameter H1-xx = 1B [MFDI Function Select =
Programming Lockout].
Turn ON the terminals to which H1-xx = 1B is set, and then change the
parameters.
An incorrect password was entered in A1-04 [Password]. • 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]
The drive detected Uv [Undervoltage]. • View U1-07 [DC Bus Voltage] to see the power supply voltage.
• Examine the main circuit wiring.
◆ The Motor Does Not Rotate After Entering Run Command
Causes Possible Solutions
The drive is not in Drive Mode. 1. Make sure that the keypad shows [Rdy].
2. If the keypad does not show [Rdy], go back to the Home screen.
The drive stopped, was pushed, and changed the Run
command source to the keypad.
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 .
Auto-Tuning completed. 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.
The drive received a fast stop command. Turn off the fast stop input signal.
The settings for the source that supplies the Run command
are incorrect.
Set b1-02 [Run Command Selection 1] correctly.
The frequency reference source is set incorrectly. Set b1-01 [Frequency Reference Selection 1] correctly.
There is defective wiring in the control circuit terminals. • Correctly wire the drive control circuit terminals.
• View U1-10 [Input Terminal Status] for input terminal status.