Description of Fault Codes
‑56‑
Cause
Confirming Method
Solution
1. The control power supply
of servo drives in size C/D/E
are unstable or fails.
Check whether the control
circuit (L1C, L2C) is in the
process of power‑off or
instantaneous power failure
occurs.
Power off and on the servo
drive again. If unexpected
power failure occurs, ensure
the power supply is stable.
Check whether the input
voltage of the control circuit
cable 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)
380 V servo drive:
Value range: 380 V to 440 V
Allowable deviation: –10%
to +10% (342 V to 484 V)
Increase the power supply
capacity.
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
Cause:
The actual speed of the motor exceeds the overspeed threshold.
Cause
Confirming Method
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/W cables in
the correct phase sequence.
2. H0A.08 is set improperly.
Check whether the
overspeed threshold is lower
than the maximum speed
needed:
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).
Reset the overspeed
threshold according to the
mechanical requirements.
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