Motor Is Too Hot - YASKAWA FSDrive-MV1000 Instructions Manual

5.11 Troubleshooting without Fault Display
Motor Rotates in the Opposite Direction from the Run Command
■
Cause
Phase wiring between the drive and motor is incorrect.
The connection is incorrect between the drive's
control circuit terminals (forward/reverse) and
forward/reverse signals of control panel.
The forward direction for the motor is setup
incorrectly.
The motor is running at almost 0 Hz and the Speed
Search estimated the speed to be in the opposite
direction.
Note: Check the motor specifications for the forward and reverse directions. The motor specifications will vary depending on the
manufacturer of the motor.
Motor Rotates in One Direction Only
■
Cause
The drive prohibits reverse rotation.

◆ Motor is Too Hot

Cause
The load is too heavy.
The air around the motor is too hot.
The drive is operating in a vector control mode but
Auto-Tuning has not yet been performed.
Insufficient voltage insulation between motor phases.
The motor fan has stopped or is clogged.
154
Check the motor wiring.
⇒Switch two motor cables (U, V, and W) to reverse motor direction.
⇒Connect drive output terminals U, V, and W in the right order to match motor
terminals U, V, and W.
Check to see the wiring of control circuit.
⇒Correct the wiring.
⇒Connect the drive's output terminals (U, V, and W) and motor terminals (U, V,
and W) properly.
⇒When the wiring is correct, exchange two of cables U, V, and W connected to the
motor.
1
1 Typically, forward is designated as being
2
2 Motor Shaft
⇒Disable bi-directional search (b3-14 = "0") so that Speed Search is performed
only in the specified direction.
Check parameter b1-04.
⇒Set the drive to allow the motor to rotate in reverse (b1-04 = 0).
If the load is too heavy for the motor, the motor will overheat as it exceeds its rated
torque value for an extended period of time.
Note: Keep in mind that the motor also has a short-term overload
rating in addition to the possible solutions provided below:
⇒Reduce the load.
⇒Increase the acceleration and deceleration times.
⇒Check the values set for the motor protection (L1-01, L1-02) as well as the motor
rated current (E2-01).
⇒Increase motor capacity.
Check the ambient temperature.
⇒Cool the area until it is within the specified temperature range.
⇒Perform Auto-Tuning.
⇒Calculate the motor value and reset the motor parameters.
⇒Change the motor control method to V/f Control (A1-02 = 0).
When a motor is connected to the drive output terminals (U, V, W), a surge voltage
is generated between the drive's switching and motor's winding coil. Generally, the
maximum surge voltage is about 1.5 times the Power Cell input power supply
voltage (1500 V with a 1200 V input).
⇒Use a motor with a voltage tolerance higher than the max voltage surge.
Check the motor fan.
Possible Solutions
counterclockwise when looking from the motor shaft.
Possible Solutions
Possible Solutions
YASKAWA ELECTRIC EZZ010928 FSDrive-MV1000 Instructions