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TROUBLE SHOOTING
7-7
5.
If grating sound can be heard from motor.
Possible Causes
What to Check and Suggested Measures
1.
The carrier frequency
was set too low.
Check the data of function codes F26 and F27.
→
Increase the carrier frequency (F26).
→
Select the optimal value to the selection function (F27).
6.
The motor dose not accelerates and decelerates at the set time.
Possible Causes
What to Check and Suggested Measures
1.
The inverter ran the
motor by S-curve or
curvilinear pattern.
Check the data of function code H07.
→
Select the linear pattern.
2.
The current limiting
prevented the output
frequency from
increasing.
Check that current limiting is enabled with Menu#3 “Drive
monitoring” and check the current limiting level (F44) using the
keypad.
→
Change the current limiting level (F44) to a correct value.
→
Increase the acceleration and deceleration time (F07, F08, E10,
and E11).
3.
The automatic
deceleration was
active.
Check the data of function code H69.
→
Consider the use of a braking resistor.
→
Increase the deceleration time (F08 and E11).
4.
Overload
Measure the output current.
→
Lighten the load.
5.
Torque generated by
the motor was
insufficient.
Check that the motor starts running if the value of the torque boost
(F09) is increased.
→
Increase the value of the torque boost (F09).
6.
An external frequency
command device is
being used.
Check that the there is no noise in the external signal wires.
→
Isolate the control signal wires from the main circuit wires as far
as possible.
→
Use shielded wire or twisted wire for the control signal wires.
7.
Even if the power recovers after an instantaneous power failure, the motor does not
restart.
Possible Causes
What to Check and Suggested Measures
1.
The setting of function
code F14 did not make
the motor restart even
if the power recovered
after an instantaneous
power failure.
Check if an under voltage trip occurs.
→
Change the data of function code F14 to 4 or 5.
2.
The run command
stayed off even after
the power recovered.
Check the input signal with Menu#4 “I/O checking” using the keypad.
→
Check the power recovery sequence with an external circuit. If
necessary, consider the use of a relay that can keep the run
command on.
Содержание MWHE20
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