Mitsubishi FR - S500 instruction manual Troubleshooting, Motor remains stopped

3.2 Troubleshooting

POINTS

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.

3.2.1 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

Check that the start signal is input.

Check that both the forward and reverse rotation start signals are not input.

Check that the frequency setting signal is not zero.

Check that the AU signal is on when the frequency setting signal is 4 to 20mA.

Check that the output stop signal (MRS) or reset signal (RES) is not on. (Assign signals MRS and RES using Pr. 60 to Pr. 63 (input terminal function selection).)

Check that the sink or source connector is fitted securely.

3) Check the parameter settings

Check that the reverse rotation prevention (Pr. 78) is not selected. Check that the operation mode (Pr. 79) setting is correct.

Check that the bias and gain (C2 to C7) settings are correct.

Check that the starting frequency (Pr. 13) setting is not greater than the running frequency.

Check that various operational functions (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.	3
		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 Pr. 15 "jog frequency" setting is not lower than the Pr. 13
		"starting frequency" value.

146