8 Troubleshooting
YASKAWA Europe
TOEP C710606 50B - AC Drive L1000V - Quick Start Guide
EN 49
Motor speed fault.
The torque reference was too high.
• Lengthen the acceleration ramp. Increase C1-01
if set in s.
• If possible, disconnect the load.
Current detection error
• One or all output phases are lost.
• Current is either too low or exceeds the drives
rating.
• The current sensors are faulty.
• Check the wiring. Make sure the motor contactor
is closed during tuning.
• Make sure, that the drive rating fits to the motor.
• Check the load. (Auto-Tuning should have been
performed without the load connected or with
very low load.)
• Replace the drive.
Rated current alarm
• The torque reference exceeded 20% during
Auto-Tuning.
• The calculated no-load current is above 80%
of the motor rated current.
• Check the V/f pattern setting.
• Perform Auto-Tuning without the load con-
nected.
• Check the input data and repeat Auto-Tuning.
Motor iron-core saturation coefficient
• Calculated core saturation values out of range.
• Incorrect data was entered.
• Check the input data.
• Check the motor wiring.
• Perform Auto-Tuning without load connected.
Rated current setting alarm
Check the input data and repeat tuning.
Adjusted Slip Calculation Error
The slip that was calculated is outside the allow-
able range.
• Make sure the data entered for Auto-Tuning is
correct.
• Execute Rotational Auto-Tuning instead. If not
possible, try Stationary Auto-Tuning 2.
Resistance Tuning Error
The resistance value that was calculated is out-
side the allowable range.
• Double check the data that was entered for the
Auto-Tuning process.
• Check the motor and motor cable connection for
faults.
Leakage Inductance Alarm
The leakage inductance value that was calculated
is outside the allowable range.
Double check the data that was entered for the
Auto-Tuning process.
No-Load Current Alarm
• The entered no-load current value was outside
the allowable range.
• Auto-Tuning results were less than 5% of the
motor rated current.
• Check and correct faulty motor wiring.
• Double check the data that was entered for the
Auto-Tuning process.
Digital
Operator
Cause
Corrective Action
Er-11
Er-12
End1
End2
End3
End4
End5
End6
End7
