
7
-6
OL1
Motor
Overloaded
Motor Overload
The motor overload protection
function has operated based on the
internal electronic thermal value.
The load is too heavy. The acceleration
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. (Autotuning for motor
line-to-line resistance is
required.)
• 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 cur-
rent.)
• Motor protection selection (L1-01) is
set to general-purpose motor protec-
tion (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 control)
• 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 termi-
nal.
• Make sure that incorrect wiring
has not been done.
• Check the resistance and wiring
for the frequency setting potenti-
ometer, etc. (Check that the cur-
rent for terV and –V is
20 mA or less.)
The input voltage is lower than the
Inverter’s output voltage reference (U1-
06) and hunting or fluctuation is occur-
ring in the output current.
• Decrease the setting of E1-05
(Max. Voltage). (Typically,
decrease in intervals by 10%.)
• Decrease the setting of C4-01
(Torque Compensation Gain)
(0.0 to 0.5).
Table 7.1 Fault Displays and Processing (Continued)
Display
Meaning
Probable Causes
Corrective Actions
TOE-S616-60.1.book 6 ページ 2017年8月4日 金曜日 午後3時41分