YASKAWA T1000A, Техническое руководство, Страница: 307 / 517

6.10 Troubleshooting without Fault Display
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual 307
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Note: Check the motor specifications for the forward and reverse directions. The motor specifications will vary depending on the
manufacturer of the motor.
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Motor Rotates in One Direction Only
u
Motor is Too Hot
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Drive Does Not Allow Selection the Desired Auto-Tuning Mode
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oPE02 Error Occurs When Lowering the Motor Rated Current Setting
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Motor Stalls during Acceleration or Acceleration Time is Too Long
The motor is running at almost 0 Hz and the Speed Search estimated
the speed to be in the opposite direction.
Disable bi-directional search (b3-14 = “0”) so that Speed Search is performed only in the specified direction.
Cause Possible Solutions
The drive prohibits reverse rotation.
• Check parameter b1-04.
• Set the drive to allow the motor to rotate in reverse (b1-04 = 0).
A Reverse run signal has not been entered, although 3-wire
sequence is selected.
Make sure that one of the input terminals S3 to S8 used for the 3-wire sequence has been set for reverse.
Cause Possible Solutions
The load is too heavy.
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.
The air around the motor is too hot.
• Check the ambient temperature.
• Cool the area until it is within the specified temperature range.
The drive is operating in a vector control mode but Auto-Tuning has
not yet been performed.
• Perform Auto-Tuning.
• Calculate the motor value and reset the motor parameters.
• Change the motor control method to V/f Control (A1-02 = 0).
Insufficient voltage insulation between motor phases.
When the motor cable is long, high voltage surges occur between the motor coils and drive switching.
Normally, surges can reach up to three times the drive input power supply voltage (600 V for 200 V class, and 1200 V
for 400 V class).
• Use a motor with a voltage tolerance higher than the max voltage surge.
• Use a motor designed to work specifically with a drive when using a 400 V class unit.
• Install an AC reactor on the output side of the drive. The carrier frequency should be set to 2 kHz when installing
an AC reactor.
The motor fan has stopped or is clogged. Check the motor fan.
Cause Possible Solutions
The desired Auto-Tuning mode is not available for the selected
control mode. • Check if the desired tuning mode is available for the selected control mode. Refer to Auto-Tuning on page 87.
• Change the motor control method by setting A1-02.
Cause Possible Solutions
Motor rated current and the motor no-load current setting in the
drive are incorrect.
• The user is trying to set the motor rated current in E2-01 to a value lower than the no-load current set in E2-03.
• Make sure that value set in E2-01 is higher than E2-03.
• If it is necessary to set E2-01 lower than E2-03, first lower the value set to E2-03, then change the setting in E2-01
as needed.
Cause Possible Solutions
Torque limit has been reached or current suppression keeps the drive
from accelerating.
Take the following steps to resolve the problem:
• Reduce the load.
• Increase motor capacity.
Note: Although the drive has a Stall Prevention function and a Torque Compensation Limit function, accelerating too
quickly or trying to drive an excessively large load can exceed the capabilities of the motor.
Load is too heavy.
Torque limit is not set properly. Check the torque limit setting.
Frequency reference is too low.
• Check the maximum output frequency (E1-04).
• Increase E1-04 if it is set too low.
Check U1-01 for proper frequency reference.
Check if a frequency reference signal switch has been set to one of the multi-function input terminals.
Check for low gain level set to terminals A1, A2, or A3 (H3-03, H3-11, H3-07).
Load is too heavy.
Reduce the load so that the output current remains within the motor rated current.
• Increase the acceleration time.
• Check if the mechanical brake is fully releasing as it should.
Acceleration time has been set too long. Check if the acceleration time parameters have been set too long (C1-01, C1-03, C1-05, C1-07).
Cause Possible Solutions