128
Frequency Option )
3.Replace the cooling fan
Motor Overheat
The temperature
signal from motor
temperature sensor
via the terminal MT
exceeded the overheat
detection level of the
drive.
1. Incorrect motor
temperature input (terminal
MT) wiring
2. Fault on the machinery (e.g.,
machinery is locked up)
3. Motor overheat
1. Correct the wiring for terminal
MT.
2. Check the machinery status
3. Check the load, acceleration /
deceleration time and cycle time
a. Reduce the load.
b. Increase C1-00 to C1-07
(Acc./Dec. Time) settings
c. Adjust d1-02 to d1-11 (V/F
Characteristics)
Mechanical
Weakening Detection
for Overtorque
Overtorque in the
conditions set to
P6-06
Overtorque in the conditions
set to P6-06
Check the condition of mechanical
weakening
1. The load is too heavy
2. The acceleration and
deceleration times are too
short
3. The motor is driven below
the rated speed with a high
load
4. Incorrect setting in P1-00
(Motor Protection Function
Selection) when running a
special motor
5. The voltage determined by
the V/F is too high
6. d2-00 (Motor Rated
Current ) setting incorrect
7. The base frequency is set
too low
8. Use one drive to run
multiple motors
9. The electrical thermal
protection characteristics do
not match the motor overload
1. Check loading capacity
» Reduce the load
2. Confirm acceleration and
deceleration times
»Increase C1-00 to C1-07
parameter settings
3. »Reduce the load
» Increase the speed
» Either increase the motor
capacity or use a special-purpose
motor if the motor needs to
operate at low speeds
4. Set P1-00 to 2.
5. Adjust d1-02 to d1-11 settings
(V/F Characteristics)
Note: If d1-02 to d1-11 settings are
too low, load tolerance at low
speeds will be reduced
6.Confirm the motor rated current
» Set d2-00 (Motor Rated Current )
according to the motor nameplate
7. Confirm the rated frequency
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