Description of Fault Codes
‑64‑
Cause
Troubleshooting
Solution
1. The ambient temperature
is too high.
Measure the ambient
temperature.
Improve the cooling
conditions of the servo drive
to lower down the ambient
temperature.
2. The servo drive is
restarted repeatedly to reset
the overload fault.
View the fault log (set
H0b.33 and view H0b.34).
Check whether an overload
fault or warning (E620.0,
E630.0, E650.5, E909.0,
E920.0, E922.0) occurs.
Change the fault reset
method. After overload
occurs, wait for 30s before
reset. Increase the
capacities of the servo drive
and servo motor. Increase
the acceleration/
deceleration time and
reduce the load.
3. The fan is damaged.
Check whether the fan
works properly during
operation.
Replace the servo drive.
4. The servo drive is installed
in a wrong direction and the
clearance between servo
drives is improper.
Check whether the servo
drive is installed properly.
Install the servo drive
according to the installation
requirements.
5. The servo drive is faulty.
The fault persists even
though the servo drive is
restarted five minutes after
power‑off.
Replace the servo drive.
Note
When E620.0 occurs, stop the servo drive for at least 30s before further operations.
● E660.0: Motor overtemperature
Description:
The temperature of the air‑cooled motor is too high.
Cause
Troubleshooting
Solution
The temperature of the air‑
cooled motor is too high.
Measure whether the
temperature of the air‑
cooled motor is too high.
Cool the motor down.
● E661.0: STune failure
Description:
During STune operation, the gain drops to the lower limit.
■ Position loop gain < 5.
■ Speed loop gain < 5.
■ Model loop gain < 10.
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