Description of Fault Codes
‑51‑
380 V servo drive: Normal value: 540 V Undervoltage threshold: 380 V.
Cause
Troubleshooting
Solution
The power supply of the
main circuit is unstable or
power failure occurs.
Check the power input
specifications of the servo
drive and measure whether
the input voltage at the
power supply side of the
main circuit cables and R/S/
T on the drive side is within
the following range:
220 V servo drive:
Value range: 220 V to 240 V
Allowable deviation: –10%
to +10% (198 V to 264 V)
Measure the voltages of all
the three phases.
Increase the capacity of the
power supply.
Instantaneous power failure
occurs.
The power voltage drops
during running.
Monitor the power supply
voltage and check whether
the main circuit power
supply is applied to other
devices, resulting in
insufficient power capacity
and voltage drop.
4. A three‑phase servo drive
is connected to a single‑
phase power supply, leading
to phase loss.
Check whether the main
circuit is wired correctly and
whether phase loss
detection (H0A.00) is hidden.
Replace the cables and wire
the power cables correctly
Three‑phase: R, S, T
5. The servo drive is faulty.
Check whether H0b.26 (Bus
voltage) is within the
following range:
220 V servo drive: H0b.26 <
200 V
380V servo drive: H0b.26 <
380V
The fault persists after the
main circuit is powered off
and on repeatedly.
Replace the servo drive.
● E410.1: Main circuit de‑energized
Description:
Phase loss occurs on the three‑phase servo drive.
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