Description of Fault Codes
‑44‑
Cause
Troubleshooting
Solution
FPGA operation timeout
Internal fault code H0b.45 =
4208: Current loop operation
timeout
Disable some unnecessary
functions to reduce the
operating load of the current
loop.
● E210.0: Output short‑circuited to ground
Description:
An abnormal motor phase current or bus voltage is detected during power‑on self‑
testing.
■ The DC bus voltage exceeds the discharge threshold.
■ The phase U current of size C/D/E models is greater than 1/4 of H01.07.
■ Overcurrent occurs on phase‑P and phase‑N of servo drives in SIZE A and B.
Cause
Troubleshooting
Solution
1. The servo drive power
cables (U/V/W) are short‑
circuited to ground.
Disconnect the motor cables
and measure whether the
servo drive power cables (U/
V/W) are short‑circuited to
ground (PE).
Connect the cables again or
replace the servo drive
power cables.
2. The motor is short‑
circuited to ground.
After confirming the servo
drive power cables and
motor cables are connected
properly, measure whether
the insulation resistance
between the servo drive U/
V/W side and the PE cable is
at MΩ level.
Replace the motor.
3. The servo drive is faulty.
Disconnect the power cables
from the servo drive, but the
fault persists after the servo
drive is powered off and on
repeatedly.
Replace the servo drive.
4. The motor speed is too
high during phase‑to‑ground
detection.
Check whether the motor is
in the generating status
during power‑on.
Reduce the motor speed.
● E234.0: Runaway
Description:
■ The torque reference direction is in reverse to the speed feedback direction in
the torque control mode.
■ The speed feedback direction is in reverse to the speed reference direction in
the position or speed control mode.
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