Motor Is Too Hot - YASKAWA AC Drive-A1000 Technical Manual

6.10 Troubleshooting without Fault Display
Cause
STOP
was pressed when the drive
was started from a REMOTE source.
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 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.
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.
u

Motor is Too Hot

Cause
The load is too heavy.
The air around the motor is too hot.
338
•
STOP
Pressing will decelerate the drive to stop.
• Switch off the Run command and then re-enter a new Run command.
•
Set o2-02 to 0 to disable
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 the drive to allow the motor to rotate in reverse (b1-04 = 0).
• 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.
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Possible Solutions
STOP
.
290.
Possible Solutions
Possible Solutions
Possible Solutions
1
2