6.7 Auto-Tuning Errors
382 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Code Name Causes Possible Solutions
End7 No-Load Current Alarm The Auto-Tuning results of the motor
no-load current value were not in the
applicable range.
Examine and repair damaged motor wiring.
Auto-Tuning results were less than 5%
of the motor rated current.
Make sure that the input motor nameplate data is
correct, and do Auto-Tuning again.
Code Name Causes Possible Solutions
Er-01 Motor Data 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.
The combination of the motor rated
power and motor rated current do not
match.
• Examine the combination of drive capacity and
motor output.
• Do Auto-Tuning again, and correctly set the
motor rated power and motor rated current.
The combination of the motor rated
current that was entered during Auto-
Tuning and E2-03 [Motor No-Load
Current] do not match.
1. Examine the motor rated current and the no-
load current.
2. Set E2-03 correctly.
3. Do Auto-Tuning again, and correctly set the
motor rated current.
The combination of the setting values of
Motor Base Frequency and Motor Base
Speed do not match.
Do Auto-Tuning again, and correctly set the Motor
Base Frequency and Motor Base Speed.
Code Name Causes Possible Solutions
Er-02 Drive in an Alarm State 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.
There is a defective motor cable or cable
connection.
Examine and repair motor wiring.
The load is too heavy. • Decrease the load.
• Examine the machine area to see if, for example,
the motor shaft is locked.
The drive detected a minor fault during
Auto-Tuning.
1. Stop Auto-Tuning.
2. Examine the minor fault code and remove the
cause of the problem.
3. Do Auto-Tuning again.
Code Name Causes Possible Solutions
Er-03 STOP Button was Pressed
During Auto-Tuning, was
pushed and Auto-Tuning was
interrupted.
Auto-Tuning did not complete correctly. Do Auto-
Tuning again.
Code Name Causes Possible Solutions
Er-04 Line-to-Line Resistance
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.
There is a defective motor cable or cable
connection.
• 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.
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