Instruction manual

76
Details of Troubleshooting
3.4.2 Motor does not rotate, or motor rotation direction does not change
• Main causes
Cause Measures
Related
Parameters
The motor is at a stop due to fault
occurrence.
Occurred fault : xxx
Refer to the item related to faults in "Help" and then take measures. -
The main circuit power (R/L1, S/L2, T/L3)
is not ON or the power supply phase is
lost.
Check the main circuit power (R/L1, S/L2, T/L3) is ON.
When high power factor converter, power supply regeneration common
converter, etc. is used (driving by DC power input to P and N), check the
setting of regenerative function selection (Pr. 30) .
Pr. 30
Power is not ON or input voltage is
insufficient.
Check that the power is ON. Check that the input voltage is not
insufficient.
-
Both STF and STR signals are ON or OFF.
Turn ON the signal to the direction which the motor is supposed to run
and OFF the other signal.
-
The MRS signal is ON. Turn OFF the MRS signal. -
The start frequency is larger than the set
frequency.
Set the start frequency (Pr. 13) lower than the set frequency. Pr. 13
Although the running speed is entered to
terminal 4, the AU signal is OFF.
Turn the AU signal ON. -
The inverter operates in PU mode and
forward rotation/reverse rotation command
is not entered.
Give forward rotation or reverse rotation command. -
The maximum frequency is smaller than
the start frequency.
Set the maximum frequency (Pr. 1, Pr. 18) larger than the start frequency
(Pr. 13), or set the start frequency (Pr. 13) smaller than the maximum
frequency (Pr. 1, Pr. 18) .
Pr. 1, 13, 18
Automatic restart after instantaneous
power failure is valid and CS signal is OFF.
Cancel automatic restart after instantaneous power failure, or turn the
CS signal ON.
Pr. 57
Reverse rotation prevention selection is
set.
Change the reverse rotation prevention selection (Pr. 78) setting to allow
the desired rotation direction.
Pr. 78
PID control activated Cancel PID control. Pr. 128
Stall prevention (current limit/voltage limit)
or regeneration avoidance is activated.
1. Common
Check the motor connection.
2. Current limit
(1) Execute trouble shooting of "Motor current is large"
(2) Adjust torque boost (Pr. 0, etc.)
(3) Adjust V/F pattern parameters (Pr. 3, 14,19, etc.)
(4) Set a larger value in acceleration/deceleration time (Pr. 7, Pr. 8, etc.).
(5) Reduce the load weight.
(6) Try other control method.
(7) Increase stall prevention level (Pr. 22, etc.), or limit stall prevention
operation using stall prevention operation selection (Pr. 156).
3. Voltage limit
Set a longer deceleration time (Pr. 8).
4. Regeneration avoidance operation
(1) Set a longer deceleration time (Pr. 8).
(2) Adjust regeneration avoidance parameters.
2.
(2) Pr. 0, 46, 112
(3) Pr. 3, 14, 19, 47,
113
(4) Pr. 7, 8, 44, 45,
110, 111
(6) Pr
. 71, 80, 81,
83, 84, 96, 450,
451, 453, 454,
456, 463, 800
(7) Pr. 22, 23, 48,
114, 156
3. Pr. 8
4.
(1) Pr. 8
(2) Pr. 665, 882,
883, 884, 885,
886