Description of Fault Codes
‑79‑
Cause
Confirming Method
Solution
1. The serial incremental
encoder cable is
disconnected or loose.
Check the wiring.
Check for wrong connection,
disconnection and poor
contact of the encoder
cable. Route the motor
cable and encoder cable
through different routes.
2. An error occurs when
reading/writing the serial
incremental encoder
parameters.
If the fault persists after the
servo drive is powered off
and on repeatedly, the
encoder is faulty.
Replace the servo motor.
● EA33.1: Fully closed‑loop Inovance 2nd encoder data read/write error
The solution is the same as EA33.0.
● EB00.0: Position deviation too large
Cause:
The position deviation in the position control mode is larger than the setpoint of
6065h (Threshold of excessive position deviation).
Cause
Confirming Method
Solution
1. U/V/W output phase loss
or incorrect phase sequence
occurs on the servo drive.
Perform a no‑load trial run
on the motor and check the
wiring.
Connect cables again
according to the correct
wiring diagram or replace
the cables.
2. The servo drive U/V/W
cables or the encoder cable
is disconnected.
Check the wiring.
Connect the cables again.
The servo drive power
cables must be connected in
the correct order at both
ends. Replace with new
cables if necessary and
ensure cables are connected
properly.
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