Chapter5Troubleshooting
34
Fault Code
ERR44
Fault Principle
Too large deviation between actual speed and reference speed
Fault Cause Solution
Servo drive
parameters set
wrongly
Check whether the setting of F2-10 (Torque upper limit) is smaller than
150%. If yes, set F2-10 to 150%. Check that the motor parameters F1-01 to
F1-05 are correct and whether A3-01 (Max. rotational speed) is lower than
F1-05 (Rated rotational speed).
Encoder installation
angle changing
Perform motor auto-tuning twice and check whether the value of A1-02
(encoder installation angle) changes. If the value changes a lot, contact
Inovance.
You can refer to section 3.4.3 “Setting and Auto-tuning of Motor Parameters”
or the following procedure to perform the motor auto-tuning.
1. Check that the setting of F1-00 to F1-05 is correct.
2. Set A3-00 to 0 and F0-02 to 0, and then perform auto-tuning.
3. Set F1-16 to 1 and press
RUN
to start auto-tuning.
This moment "TUNE" is displayed on the operation panel. After
auto-tuning is complete, "TUNE" disappears.
4. Restore the value of A3-00.
5. Start the servo drive again and check whether the alarm persists. If yes,
go to the next step.
Motor bearing
damaged or stuck
Hydraulic pump
damaged or stuck
Disconnect the hydraulic pump from the motor and try to rotate the motor or
hydraulic pump manually. Check whether there is resistance or noise during
rotation. If yes, it indicates that the motor or hydraulic pump is faulty and
needs to be repaired.
Encoder wiring
improper
Check whether the encoder cable is wrongly connected, becomes loose or
is short-circuited. If yes, refer to the related solution in ERR43.
External interference,
encoder damaged
View whether the value of U1-11 (Encoder signal interference degree) is 0.
If the value is a non-zero number, it indicates that the encoder suffers
interference. The larger the number is, the bigger the interference is. If the
value is 1000, it indicates that the encoder suffers very big interference, the
encoder is damaged, the encoder cable breaks or the PG card is damaged.
In this case, contact the IMM manufacturer.
Motor demagnetized
Open the overflow valve and perform static auto-tuning (set F1-16 to 2).
Then view the value of F1-15 (Back EMF). If the value is lower than 270 V, it
indicates that the motor is demagnetized. In this case, replace the motor.
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