YASKAWA CIMR-F7A Instruction Manual page 399

The operation method selection is wrong.
If constant b1-02 (reference selection) is set to 0 (Digital Operator), the motor will not operate when an exter-
nal operation signal is input. Set b1-02 to 1 (control circuit terminal) and try again.
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 by setting o2-01 to 1 and disabled by setting o2-01 to 2. It is enabled
when the drive mode is entered.
INFO
A 3-wire sequence is in effect.
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 terminal suitable
for forward run/stop and reverse run/stop is turned ON.
When using a 3-wire sequence, refer to the timing chart, set the multi-function input terminal (H1-01 through
H1-06, terminals S3 to S8) to 0, and input the proper signals.
When using a 2-wire sequence, set the multi-function input terminal (H1-01 through H1-06, terminals S3 to
S8) to a value other than 0.
The frequency reference is too low.
If the frequency reference is set below the frequency set in E1-09 (Minimum Output Frequency), the Inverter
will not operate. Raise the frequency reference to at least the minimum output frequency.
There is a multi-function analog input setting error.
If multi-function analog inputs
input, then the frequency reference will be zero. Check to be sure that the set value and analog input value are
correct.
The motor stops during acceleration or when a load is connected.
The load may be too heavy. The Inverter has a stall prevention function and an automatic torque boost func-
tion, but the motor responsiveness limit may be exceeded if acceleration is too rapid or if the load is too heavy.
Lengthen the acceleration time or reduce the load. Also consider increasing the motor capacity.
The Inverter does not operate.
Probable Causes
Run command is not sent.
The operation method
selection is wrong.
H3-05 or H3-09 is set to 1 (frequency gain), and if no voltage (current) is
Descriptions
Inverter does not operate if a Run command
is not sent.
b1-02 has to be set according to the Run
Command input method to be used.
b1-02=
0: Digital Operator
1: Control circuit terminal (factory setting)
2: MEMOBUS communications
3: Option board
4: Pulse train input
Troubleshooting
Corrective Actions
If the indicator on the RUN Key is not lit,
the Run Command is not sent. Input the
Run Command.
Set b1-02 according to the Run Command
input method to be used.
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