Chapter5Troubleshooting
33
Fault Code
ERR43
Fault Principle
Encoder signal feedback abnormal or unavailable
Fault Cause Solution
Auto-tuning fault
If the fault occurs at the first-time auto-tuning, check whether the setting of
F1-01 to F1-05 is correct. If not, correct the setting, and perform auto-tuning
again. If the fault persists, change the auto-tuning mode by setting F1-16 to
3. If the fault still persists, go to the next step.
Encoder wiring
problem
Check wiring of the encoder. Measure the BD9 connector of the encoder by
using the ohm function of the multimeter. The resistance between pins 1 and
2, pins 3 and 4, and pins 5 and 9 is expected to be about 40 or 63 . If the
measured resistance is normal, check whether the wiring sequence
between the encoder and the motor is correct and whether the wiring is
secure. After ensuring that the encoder wiring is correct, perform
auto-tuning again. If the fault persists, go to the next step.
PG card contact
problem
When the encoder is in good contact and powered on, observe whether the
red indicator on the PG card remains on. If yes, it indicates that the PG card
is in poor contact or damaged. After power-off, re-connect the cable on the
right side of the PG card to ensure good contact. Perform auto-tuning again.
If the fault persists, go to the next step.
Peripheral
interference
View the value of U1-11. If the value is larger than 100, check again whether
the encoder wiring is correct and in good contact. If the value is 1000, the
PG card or encoder may be damaged. In this case, replace the PG card,
and view the value of U1-11 again. If the fault persists after ensuring that the
wiring and PG card are normal, it indicates that the encoder may be
damaged.
Hydraulic pump or
motor stuck
Try to rotate the shaft of the motor or hydraulic pump. If the shaft cannot be
rotated, check whether the motor or hydraulic pump is stuck. Eliminate the
problem, and perform auto-tuning again.
Encoder damage
It is rather uncommon that the encoder is damaged. If the fault persists after
you perform all the preceding operations, contact the IMM manufacturer.
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