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Troubleshooting
6.2 Troubleshooting
POINT
Check the corresponding areas. If the cause is still unknown, it is
recommended to initialize the parameters (return to factory settings), re-set
the required parameter values, and check again.
6.2.1 Motor remains stopped
1) Check the main circuit
Check that a proper power supply voltage is applied (operation panel
display is provided).
Check that the motor is connected properly.
Check that the connector across P1-P<+> is connected.
2) Check the input signals
For operation using the PLC function, check that the SQ signal is shorted.
(Refer to page 100.)
Check that the start signal is input.
Check that both the forward and reverse rotation start signals are not input.
Check that the output stop signal (MRS) or reset signal (RES) is not on.
(Assign MRS and RES using Pr. 60 to Pr. 63, Pr. 65 and Pr. 505 (input
terminal function selection).)
Check that the sink or source connector is fitted securely.
3) Check the parameter settings
For inverter operation, check that the Pr. 507 "inverter operation lock
mode setting" value is "0". (Refer to page 138.).
Check that the operation mode (Pr. 79) setting is correct.
Check that the starting frequency (Pr. 13) setting is not greater than the
running frequency.
Check that various running frequencies (such as three-speed operation),
especially the maximum frequency (Pr. 1), are not zero.
4) Check the load
Check that the load is not too heavy.
Check that the shaft is not locked.
5) Others
Check that the operation panel display does not show an error (e.g. OC1).
Check that the ERR indication is not lit.
6.2.2 Motor rotates in opposite direction
Check that the phase sequence of output terminals U, V and W is correct.
Check that the start signals (forward rotation, reverse rotation) are connected correctly.
Check the setting of Pr. 17 "RUN key rotation direction selection".
162
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