7 Troubleshooting
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274
-
Fault
Code
Name Possible Causes Solution Level
Err20
Speed feedback
incorrect
Subcode 1: The encoder
signal is not detected during
synchronous motor no-load
auto-tuning.
◆
Check whether the encoder signal circuit is
normal.
◆
Check whether the PG card is normal.
◆
Check whether the brake has been released.
5A
Subcode 4: The Z signal
cannot be detected during
synchronous motor
autotuning.
◆
Check whether the encoder signal circuit is
normal.
◆
Check whether the PG card is normal.
Subcode 5: The cables of the
SIN/COS encoder break.
Subcode 7: The cables of the
UVW encoder break.
Subcode 14: The Z signal is
lost during normal running
Subcode 2, 8: Reserved.
◆
Reserved
Subcode 3, 15: The motor
cable sequence is incorrect,
the motor brake is not started,
or the encoder signal quality
is poor.
◆
Exchange the cable sequence of any two of U,
V, and W phases of the motor.
◆
Check whether the brake is started during
synchronous motor with-load auto-tuning.
◆
Check the encoder signal circuit.
Subcodes 3, 15: The phase
sequence of the motor is
incorrect.
◆
Exchange any two phases of the motor UVW
cables.
◆
Check whether the brake is released during
with-load auto-tuning of the synchronous
motor.
Subcode 9: The speed
deviation is too large.
◆
The angle of the synchronous motor is ab-
normal. Perform motor auto-tuning again.
◆
Reduce the position lock speed loop KP.
◆
The speed loop proportional gain is exces-
the proportional gain or increase the inte-
gral time properly.
◆
Check the phase sequence of the motor.
Subcode 12: The encoder AB
signals are lost at startup.
◆
Check whether the brake has been released.
◆
Check whether AB signal cables of the en-
coder break.
◆
If the motor cannot be started at the slip
experiment, perform the slip experiment by
using the function set in F3-24.
Subcode 13: The encoder AB
signals are lost during running.
◆
AB signals of the encoder become loss
suddenly. Check whether encoder wiring is
correct, whether strong interference exists,
or the motor is stuck due to sudden power
failure of the brake during running.
Subcode 19: The signals of the
SIN/COS encoder are seriously
interfered with during running.
◆
The encoder analog signals are seriously
interfered with during motor running, or
encoder signals are in poor contact. You
need to check the encoder circuit.
Subcode 55: The signals of the
SIN/COS encoder are seriously
interfered with or CD signals
are incorrect during motor
auto-tuning.
◆
The encoder analog signals are seriously
interfered with during motor auto-tuning, or
encoder CD signals are in wrong sequence.
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