Troubleshooting
6
6.7 Auto-Tuning Errors
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 383
Code Name Causes Possible Solutions
Er-05 No-Load Current Error The Auto-Tuning results were not in the
applicable parameter setting range.
Auto-Tuning did not complete in a pre-
set length of time.
• Examine and repair motor wiring.
• Disconnect the machine from the motor and do
Rotational Auto-Tuning again.
The motor nameplate data entered
during Auto-Tuning is incorrect.
• Make sure that the input motor nameplate data is
correct.
• Do Auto-Tuning again and correctly set the
motor nameplate data.
Rotational Auto-Tuning was done with
a load that was more than 30% of the
rating connected to the motor.
• Disconnect the machine from the motor and do
Rotational Auto-Tuning again.
• If you cannot uncouple the motor and load, make
sure that the load is less than 30% of the motor
rating. If a mechanical brake is installed in the
motor, release the brake during Rotational Auto-
Tuning.
Code Name Causes Possible Solutions
Er-08 Rated Slip Error The motor nameplate data entered
during Auto-Tuning is incorrect.
• Make sure that the input motor nameplate data is
correct.
• Do Auto-Tuning again and correctly set the
motor nameplate data.
Auto-Tuning did not complete in a pre-
set length of time.
The Auto-Tuning results were not in the
applicable parameter setting range.
• Examine and repair the motor wiring.
• If the motor and machine are connected during
Rotational Auto-Tuning, decouple the motor
from the machinery.
Rotational Auto-Tuning was done with
a load that was more than 30% of the
rating connected to the motor.
• Disconnect the machine from the motor and do
Rotational Auto-Tuning again.
• If you cannot uncouple the motor and load, make
sure that the load is less than 30% of the motor
rating. If a mechanical brake is installed in the
motor, release the brake during Rotational Auto-
Tuning.
Code Name Causes Possible Solutions
Er-09 Acceleration Error The motor did not accelerate for the
specified acceleration time.
1. Increase the value set in C1-01 [Acceleration
Time 1].
2. Disconnect the machine from the motor and do
Rotational Auto-Tuning again.
The value of L7-01 or L7-02 [Forward/
Reverse Torque Limit] is small.
Increase the value set in L7-01 or L7-02.
Rotational Auto-Tuning was done with
a load that was more than 30% of the
rating connected to the motor.
• Disconnect the machine from the motor and do
Rotational Auto-Tuning again.
• If you cannot uncouple the motor and load, make
sure that the load is less than 30% of the motor
rating. If a mechanical brake is installed in the
motor, release the brake during Rotational Auto-
Tuning.
Code Name Causes Possible Solutions
Er-10 Motor Direction Error There is defective drive and motor
wiring.
Examine and repair motor wiring.
There is defective drive and encoder
wiring.
Examine and repair the wiring to the encoder.
The direction of the motor and the
setting of F1-05 [PG 1 Rotation
Selection] are opposite.
Set F1-05 correctly.
The machine pulled the motor to rotate
in the opposite direction.
When the torque reference is 100% or
higher, the sign of the speed reference
was opposite of the detected speed.
Disconnect the machine from the motor and do
Rotational Auto-Tuning again.
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