Troubleshooting
9.2.2 If the Motor Does Not Operate
9-10
5. A digital setting was made for frequency reference 2 for multi-step speed operation, but
“1F” was not set for a multi-function analog input (H3-05).
D
The auxiliary frequency reference is treated as frequency reference 2 when the multi-step speed refer-
encesareusedand“0”(auxiliaryfrequency reference) is set for the multi-functionanaloginput(H3-05).
D
Make sure that “1F” is set for the multi-function analog input (H3-05) and that the setting of frequency
reference 2 is appropriate.
J
The motor does not operate when an external operation signal is input.
If the Inverter is not in operation mode, it will remain in ready status and will not start. Press the Menu Key to
display the drive mode, and enter the drive mode by pressing the Enter Key.
1. The operation method selection is wrong.
D
Ifconstantb1-02(runsource) is set to“0”(DigitalOperator),themotorwillnotoperatewhen an external
operation signal is input. Set b1-02 to “1” (control circuit terminal) and try again.
D
Similarly, the motor will also not operate if the Local/Remote Key has been pressed to switch to Digital
Operator operation. In that case press the Local/Remote Key* again to return to the original setting.
:The Local/Remote Key is enabled (set value: 1) or disabled (set value: 2) by means of constant o2-01.
It is enabled when drive mode is entered.
2. A 3-wire sequence is in effect.
D
The input method for a 3-wire sequence is different than when operating by forward/stop and reverse/
stop (2-wire sequence). When 3-wire sequence is set, the motor will not operate even when an input ter-
minal suitable for forward run/stop and reverse run/stop is turned ON.
D
When using a 3-wire sequence, refer to the timing chart on page 6 - 14 and input the proper signals.
D
When using a 2-wire sequence, set multi-function inputs H1-01 through H1-06 to a value other than 0.
3. The frequency reference is too low.
D
If the frequency reference is set below the frequency set in E1-09 (minimum output frequency), the In-
verter will not operate.
Raise the frequency reference to at least the minimum output frequency. (Related constants: b1-05,
E1-09)
4. There is a multi-function analog input setting error.
D
If multi-function analog inputs H3-05 and H3-09 are set to “1” (frequency gain), and if no voltage (cur-
rent) is input, then the frequency reference will be zero. Check to be sure that the set value and analog
input value are correct.
5. Frequency reference 2 is specified with multi-step speed operation and auxiliary frequency
reference is not input.
D
If multi-function analog input H3-05 is set to “0” (auxiliary frequency reference) and if multi-step speed
reference is used, the auxiliary frequency reference will be treated as frequency reference 2. Check to be
sure that the set value and analog input value (terminal 16) are correct.
6. A digital setting was made for frequency reference 2 for multi-step speed operation, but
“1F” was not set for a multi-function analog input (H3-05).
D
The auxiliary frequency reference is treated as frequency reference 2 when the multi-step speed refer-
encesareusedand“0”(auxiliaryfrequency reference) is set for the multi-functionanaloginput(H3-05).
D
Make sure that “1F” is set for the multi-function analog input (H3-05) and that the setting of frequency
reference 2 is appropriate.
J
The motor stops during acceleration or when a load is connected.
D
The load may be too heavy. The Inverter has a stall prevention function and an automatic torque boost
function, but the motor responsiveness limit may be exceeded if acceleration is too rapid or if the load
istoo heavy.Lengthentheaccelerationtimeorreducetheload.Alsoconsider increasingthe motorcapac-
ity.
J
The motor only rotates in one direction.
D
“Reverse run prohibited” is selected. If b1-04 (prohibition of reverse operation) is set to “1” (reverse run
prohibited), the Inverter will not receive reverse run commands. To use both forward and reverse opera-
tion, set b1-04 to “0.”
9
IMPORTANT
To Next Page
Loading...
Need help?
General