Description of Fault Codes
‑54‑
The drive control power voltage is below the undervoltage threshold.
Cause
Troubleshooting
Solution
1. The control power supply
of servo drives in size C/D/E
are unstable or fails.
Check the specifications of
the power supply and
measure whether the
voltage input to the main
circuit 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)
380V servo drive:
Effective value: 380 to 440 V
Allowable deviation: –10%
to +10% (342V to 484V)
Measure the voltages of all
the three phases.
Increase the capacity of the
power supply.
2. The control power supply
of servo drives in size C/D/E
are in poor contact.
Check whether control
circuit cables are connected
properly and whether the
voltage of control circuit
cables (L1C, L2C) is within
the specified range.
Re‑connect or replace the
cables.
● E500.0: motor overspeed
Description:
The actual speed of the motor exceeds the overspeed threshold.
Cause
Troubleshooting
Solution
1. The phase sequence of
motor cables is wrong.
Check whether the servo
drive power cables are
connected in the correct
sequence at both ends.
Connect the U, V, and W
cables according to correct
phase sequence.
2. H0A.08 is set improperly.
Check whether the
overspeed threshold is lower
than the maximum speed.
Overspeed threshold = 1.2 x
Maximum motor speed
(H0A.08 = 0).
Overspeed threshold =
H0A.08 (when H0A.08 ≠ 0,
and H0A‑08 < 1.2 x maximum
motor speed).
Re‑set the overspeed
threshold according to the
mechanical requirements.
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