Description of Fault Codes
‑69‑
Cause
Confirming Method
Solution
Check whether resonance
that occurred during ITune
operation cannot be
suppressed.
Check if vibration resonance
is properly suppressed in the
system. The torque vibration
amplitude exceeds the
setpoint of H09.11.
1. Set the notch manually
when vibration cannot be
suppressed
automatically.
2. Modify the electronic gear
ratio to improve the
command resolution,
increase the command
filter time constant or in
the parameter
configuration interface.
3. Check whether the
machine suffers from
periodic fluctuation.
4. Increase the value of
H09.11 as appropriate.
● E664.0: Excessive system resonance
Cause
Confirming Method
Solution
Resonance occurs on the
servo system and the torque
fluctuation amplitude is
higher than the value of
H09.54.
1. Check whether the torque
fluctuation range is
greater than the setpoint
of H09.54.
2. Check whether there is
abnormal noise or torque
fluctuation during
operation.
1. Check whether the inertia
ratio or loop gain
parameters are set
properly.
2. Check whether resonance
parameters are set
properly.
3. Increase the value of
H09.54 or set H09.54 to 0
to disable this function.
● E731.0: Encoder battery failure
Cause:
The voltage of the absolute encoder battery is lower than 2.9 V.
Cause
Confirming Method
Solution
1. The battery is not
connected during power‑off.
Check whether the battery is
connected during power‑off.
Set H0d.20 to 1 to clear the
fault.
2. The encoder battery
voltage is too low.
Measure the battery voltage.
Use a new battery with the
matching voltage.
● E733.0: Encoder multi‑turn counting error
Cause:
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