
7
-6
OL1
电机过载
Motor Overload
The motor overload protection func-
tion has operated based on the internal
electronic thermal value.
The load is too heavy. The accelera-
tion time, deceleration time, and cycle
time are too short.
Check the size of the load and the
length of the acceleration, deceler-
ation, and cycle times.
The constant setting for speed search
is incorrect.
(Motor overload occurred due to
motor hunting and vibration.)
• Use the speed search function.
• Adjust the settings of the Speed
search operating current (b3-02)
and Speed search deceleration
time (b3-03).
• Use the estimated speed search
function. (Perform stationary
autotuning for line-to-line resis-
tance only.)
• Motor overload occurred when run-
ning at low speed. (If a general-pur-
pose motor is used, motor overload
can occur when running at low
speed even if running within the
rated current.)
• Motor protection selection (L1-01)
is set to general-purpose motor pro-
tection (1) when an Inverter duty
motor is used.
• Check the size of the load.
• Check the setting of L1-01.
• Increase the frame size of the
Inverter.
The directions of the motor and PG
are different. (Only in flux vector con-
trol)
• Correct the PG wiring.
• Correct the motor wiring.
• Change the setting of PG rota-
tion (F1-05).
The V/f characteristics voltage is too
high.
Check the V/f characteristics.
The Motor Rated Current (E2-01) is
incorrect.
Check the Motor Rated Current
(E2-01).
• A short-circuit bV,
−
V, and
AC terminals occurred.
• Overload in the control circuit ter-
minal.
• Make sure that incorrect wiring
has not been done.
• Check the resistance and wir-
ing for the frequency setting
potentiometer, etc. (Check that
the current for terV and
–V is 20 mA or less.)
Table 7.1 Fault Displays and Processing (Continued)
Display
Meaning
Probable Causes
Corrective Actions