Motor Is Too Hot - YASKAWA P1000 Technical Manual

Cause
Motor starting torque is too low.
Frequency reference value is too low or the drive does
not accept the value entered.
The sequence Start/Stop sequence is set up
incorrectly.
n Motor Rotates in the Opposite Direction from the Run Command
Cause
Phase wiring between the drive and motor is incorrect.
The forward direction for the motor is set up 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.
n Motor Rotates in One Direction Only
Cause
The drive prohibits reverse rotation.
A Reverse run signal has not been entered, although
3-Wire sequence is selected.
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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.
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
Refer to Motor Performance Fine-Tuning on page
Enter a value that is above the minimum output frequency determined by E1-09.
• If the drive is supposed to be set up for a 2-wire sequence, then ensure parameters H1-03 through
H1-08 are not set to 0.
• If the drive is supposed to be set up for a 3-wire sequence, then one of the parameters H1-03
through H1-08 must be set to 0. Terminal S1 will become the Start, terminal S2 will become
the Stop input.
• Check the motor wiring.
• Switch two motor cables (U, V, and W) to reverse motor direction.
• Connect drive output terminals U/T1, V/T2, and W/T3 in the right order to match motor
terminals U, V, and W.
• Change the setting of parameter b1-14.
Typically, forward is designated as being counterclockwise when looking from the motor shaft
(see figure below).
1. Forward Rotating Motor (looking down the motor shaft)
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 parameter b1-04 to 0 to allow the motor to rotate in reverse.
• Make sure that one of the input terminals S3 to S8 used for the 3-Wire sequence has been set
for reverse.
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.
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.
6.10 Troubleshooting without Fault Display
Possible Solutions
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Possible Solutions
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Possible Solutions
Possible Solutions
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