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6.7 Auto-Tuning Fault Detection
Auto-Tuning faults are shown below. When the following faults are detected, the fault is displayed on the digital operator and
the motor coasts to a stop. No fault or alarm outputs will occur
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Auto-Tuning Codes, Causes, and Possible Solutions
Table 6.12 Detailed Auto-Tuning Codes, Causes, and Possible Solutions
Digital Operator Display
Error Name
End1
Excessive V/f Setting. Displayed after Auto-Tuning is complete.
Cause
Possible Solution
The torque reference exceeded 20% during
Auto-Tuning.
• 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.
The no-load current exceeded 80% of the drive
rated current during Auto-Tuning.
Digital Operator Display
Fault Name
End2
Motor Iron-Core Saturation Coefficient. Detected only during Rotational Auto-Tuning and displayed after
Auto-Tuning is complete.
Cause
Possible Solution
Motor data entered during Auto-Tuning was
incorrect.
• Enter the correct data.
• Restart Auto-Tuning and enter the correct information.
Auto-Tuning calculated values outside the
parameter setting range, assigning the iron-
core saturation coefficient (E2-07, E2-08) a
temporary value.
• Check and correct faulty motor wiring.
• Disconnect the motor from machine and perform Rotational Auto-Tuning.
Digital Operator Display
Fault Name
End3
Rated Current Setting Alarm (displayed after Auto-Tuning is complete)
Cause
Possible Solution
• The motor line-to-line resistance and the
motor-rated current are not consistent with
one another.
• The correct current rating printed on the
nameplate was not entered into T1-04.
• Check T1-04 setting.
• Check the motor data and repeat Auto-Tuning.
Digital Operator Display
Fault Name
Er-01
Motor Data Error
Cause
Possible Solution
Motor data entered during Auto-Tuning was
incorrect.
• Enter the correct data.
• Restart Auto-Tuning and enter the correct information.
Motor output and motor-rated current settings
(T1-02 and T1-04) do not match.
• Check the drive and motor capacities.
• Correct the settings of parameters T1-02 and T1-04.
Motor output and no-load current settings
(T1-04 and E2-03) do not match. Data
required when Auto-Tuning for OLV Control
or Stationary Auto-Tuning.
• Check the motor-rated current and no-load current.
• Correct the settings of parameters T1-04 and E2-03.
Base frequency and base motor rotations
(T1-05 and T1-07) do not match.
Set T1-05 and T1-07 to the correct values.
Digital Operator Display
Fault Name
Er-02
Minor Fault
Cause
Possible Solution
Motor data entered during Auto-Tuning was
incorrect.
• Enter the correct data.
• Restart Auto-Tuning and enter the correct information.
The wiring is faulty.
• Check the wiring and correct defective connections.
• Check around the machine.
• Check the load.
Load is too heavy.
6.7 Auto-Tuning Fault Detection
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual
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Troubleshooting