Motor Speed Fault (Detected Only When Auto-Tuning Is Enabled); Current Detection Error - YASKAWA V1000 Series Installation & Start-Up Manual

5.7 Auto-Tuning Fault Detection
Torque limit when motoring is
too low (L7-01 and L7-02).
LED Operator Display
Er-11
Cause
Torque reference is too high.
(Enabled in OLV only.)
LED Operator Display
Er-12
Cause
One of the motor phases is
missing (U/T1, V/T2, W/T3).
Current exceeded the current
rating of the drive.
The current is too low.
Attempted Auto-Tuning without
motor connected to the drive.
Current detection signal error.
LED Operator Display
End1
Cause
The torque reference exceeded
20% during Auto-Tuning.
The results from Auto-Tuning
the no-load current exceeded
80%.
LED Operator Display
End2
Cause
Motor data entered during
Auto-Tuning was incorrect.
Auto-Tuning calculated values
outside the parameter setting
range, assigning the iron-core
saturation coefficient (E2-07, -
08) a temporary value.
224
• Check the settings of parameters L7-01 and L7-02).
• Increase the setting.

Motor Speed Fault (detected only when Auto-Tuning is enabled)

• Increase the acceleration time (C1-01).
• Disconnect the machine from the motor, if possible.

Current Detection Error

Check motor wiring and correct problems.
• Check the motor wiring for a short between motor lines.
• If a magnetic contactor is used between motors, ensure it is on.
• Replace the drive.
Connect the motor and perform Auto-Tuning.
Replace the drive.
Excessive V/f Setting. Detected only during Rotational Auto-Tuning, and
displayed after Auto-Tuning is complete.
• Before Auto-Tuning the drive, verify the information written on the motor
nameplate and enter that data to T1-03 through T1-05.
• Enter proper information to parameters T1-03 to T1-05 and repeat Auto-Tuning.
• If possible, disconnect the motor from the load and perform Auto-Tuning.
Motor Iron-Core Saturation Coefficient. Detected only during Rotational
Auto-Tuning and displayed after Auto-Tuning is complete.
• Motor data entered to the T1 parameters does not match the information written
on the motor nameplate.
• Restart Auto-Tuning and enter the correct information.
• Check and correct faulty motor wiring.
• Disconnect the motor from machine and perform Rotational Auto-Tuning.
YASKAWA ELECTRIC TOEP C710606 09B YASKAWA AC Drive V1000 Installation & Start-Up Manual
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