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

6.10

Troubleshooting without Fault Display

If the drive or motor operates abnormally but a fault code or error code is not displayed on the keypad, refer to
this section and take appropriate measures.
• Motor hunting and oscillation
• Poor motor torque
• Poor speed precision
• Poor motor torque and speed response
• Motor noise
◆

Cannot Change Parameter Settings

Cause
The drive is running the motor. (The drive is in Drive
Mode.)
A1-01 = 0 [Access Level Selection = Operation Only] has
been set.
H1-xx = 1B [MFDI Function Select = Program Lockout]
has been set.
The wrong password was entered.
Uv [Undervoltage] has been detected.
◆

Motor Does Not Rotate After Entering Run Command

Cause
The drive is not in Drive Mode.
was pressed while the drive was stopped, so the Run
command source switched to the keypad.
Auto-Tuning has just completed.
The fast stop command has been entered.
Settings are incorrect for the source that provides the Run
command.
The frequency reference source is not set correctly.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual

6.10 Troubleshooting without Fault Display

Possible Solution
Stop the drive and switch over to Programming Mode.
Set A1-01 = 2 [Access Level Selection = Advanced Level].
Turn on the terminals to which H1-xx = 1B has been assigned, and then
change the parameters.
Note:
When terminals to which H1-xx = 1B has been assigned have been
turned off, the parameters cannot be changed.
• Enter the password to A1-04 [Password] again.
• If the password has been forgotten, set the password again using A1-04
and A1-05 [Password Setting].
Note:
If the password has been set, the following parameters cannot be
changed unless 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 Parameters 1 to 32]
• Check the power supply voltage using U1-07 [DC Bus Voltage].
• Check the main circuit wiring.
Possible Solution
1. Check whether [Rdy] is displayed on the keypad.
2. If [Rdy] is not displayed, return to the Home screen.
Perform one of the following operations:
• Press .
• Restart the drive.
Note:
Switching the Run command source using
setting o2-01 = 0 [LO/RE Key Function Selection = Disabled].
Switch the keypad to the Home screen.
Note:
When Auto-Tuning completes, the drive is switched back to the
Programming Mode. The Run command will not be accepted unless the
drive is in the 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.
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