5.11 Troubleshooting without Fault Display
YASKAWA ELECTRIC EZZ010928 FSDrive-MV1000 Instructions 153
◆ Motor Does Not Rotate Properly after Pressing RUN Button or after Entering
External Run Command
■ Motor Does Not Rotate
Cause Possible Solutions
The drive is not in the Drive Mode.
Check if the DRV light on the digital operator is lit.
⇒Enter the Drive Mode to begin operating the motor (refer to 83).
The LO/RE function selection key was pressed as a
command was entered from the control circuit
terminal.
To change the “run authority” to the digital operator, press the LO/RE function
selection key while the drive is stopping. Then disable the Run commands from the
control circuit terminal.
⇒Do one of the following procedures.
• Press the LO/RE function selection key again.
• Restart the control power.
Note: If o2-01 is set to 0, then the LO/RE button will be disabled.
Auto-Tuning has just completed.
When Auto-Tuning completes, the drive is switched back to the Programming
Mode. The Run command will not be accepted unless the drive is in the Drive
Mode.
⇒Use the digital operator to enter the Drive Mode (refer to 83).
A Fast Stop was executed and has not yet been reset. ⇒Reset the Fast Stop command.
Settings are incorrect for the source that provides the
Run command.
Check parameter b1-02 (Run Command Selection 1).
⇒Set b1-02 so that it corresponds with the correct Run command source.
0: Digital operator
1: Control circuit terminal (default setting)
2: MEMOBUS/Modbus communications
3: Option card
There is faulty wiring in the control circuit terminals.
Check the wiring for the control terminal.
⇒Correct wiring mistakes.
⇒Check the input terminal status monitor (U1-10).
The drive has been set to accept the frequency
reference from the incorrect source.
Check parameter b1-01 (Frequency Reference Selection 1).
⇒Set b1-01 to the correct source of the frequency reference.
0: Digital operator Keypad
1: Control circuit terminal (default setting)
2: MEMOBUS/Modbus communications
3: Option card
Frequency reference is too low.
Check the frequency reference monitor (U1-01).
⇒Increase the frequency by changing the maximum output frequency (E1-09).
The analog input setting is not appropriate.
Check the analog input terminal settings.
If 1 (frequency reference gain) has been set for H3-02 (function selection for analog
input terminal L1) and no voltage (current) has been input, the frequency reference
will be zero.
⇒Check if H3-02 has been set to the proper values.
⇒Check if the analog input value has been set properly (U1-13).
The STOP key was pressed.
When the STOP key is pressed, the drive will decelerate to stop.
⇒Switch off the Run command and then re-enter a new Run command.
Note: The STOP key can be disabled when o2-02 is set to 0.
Motor starting torque is too low. ⇒Adjust the parameters that affect controllability (refer to 110).
Frequency reference value is too low or the drive does
not accept the value entered.
Enter a value that is above the minimum output frequency determined by E1-09.
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