YASKAWA CIMR-F7A Instruction Manual page 382

Display
Motor Overload
The motor overload protection func-
tion has operated based on the internal
electronic thermal value.
Inverter Overload
The Inverter overload protection func-
tion has operated based on the internal
electronic thermal value.
Overtorque Detected 1
There has been a current greater than
the setting in L6-02 for longer than the
setting in L6-03.
-6
7
Table 7.1 Fault Displays and Processing (Continued)
Meaning
The directions of the motor and PG
are different. (Only in flux vector con-
trol)
The V/f characteristics voltage is too
high or too low.
The Motor Rated Current (E2-01) and
Motor 2 Rated Current (E4-01) is
incorrect.
• A short-circuit between +V, −V, and
AC terminals occurred.
• Overload in the control circuit ter-
minal.
The load is too heavy. The accelera-
tion time, deceleration time and cycle
time are too short.
The constant setting for speed search
is incorrect.
(Motor overload occurred due to
motor hunting and vibration.)
The directions of the motor and PG
are different. (Only in flux vector con-
trol)
The V/f characteristics voltage is too
high or too low.
The Inverter capacity is too low.
• A short-circuit between +V, −V, and
AC terminals occurred.
• Overload in the control circuit ter-
minal.
Inverter overload occurred when run-
ning at a low speed of 6 Hz or less.
Probable Causes
• Correct the PG wiring.
• Correct the motor wiring.
• Change the setting of PG rota-
Check the V/f characteristics.
Check the Motor Rated Current
(E2-01) and Motor 2 Rated Cur-
rent (E4-01).
• Make sure that incorrect wiring
• Check the resistance and wir-
Check the size of the load and the
length of the acceleration, deceler-
ation, and cycle times.
• Use the speed search function.
• Adjust the settings of the Speed
• Use the estimated speed search
• Correct the PG wiring.
• Correct the motor wiring.
• Change the setting of PG rota-
Check the V/f characteristics.
Replace the Inverter with one that
has a larger capacity.
• Make sure that incorrect wiring
• Check the resistance and wir-
• Reduce the load.
• Increase the frame size of the
• Lower the carrier frequency.
• Make sure that the settings in
-
• Check the mechanical system
Corrective Actions
tion (F1-05).
has not been done.
ing for the frequency setting
potentiometer, etc. (Check that
the current for terminals +V and
–V is 20 mA or less.)
search operating current (b3-02)
and Speed search deceleration
time (b3-03).
function. (Perform stationary
autotuning for line-to-line resis-
tance only.)
tion (F1-05).
has not been done.
ing for the frequency setting
potentiometer, etc. (Check that
the current for terminals +V and
–V is 20 mA or less.)
Inverter.
L6-02 and L6-03 are appropri-
ate.
and correct the cause of the
overtorque.