Yaskawa AC Drive P1000 Bypass Technical Manual - Manual (Page 206)

n Motor Rotates in the Opposite Direction from the Run Command
Cause Possible Solutions
Phase wiring between the drive and motor is incorrect.
• 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.
The forward direction for the motor is set up incorrectly.
Typically, forward is designated as being counterclockwise when looking from the motor shaft
(see figure below).
1
2
1. Forward Rotating Motor (looking down the motor shaft)
2. Motor Shaft
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.
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 Possible Solutions
The drive prohibits reverse rotation.
• Check parameter b1-04.
• Set parameter b1-04 to 0 to allow the motor to rotate in reverse.
u Motor is Too Hot
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.
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.
• Use a motor with a voltage tolerance higher than the max voltage surge.
• Use an inverter-duty motor rated for use with AC drives.
• 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.
The carrier frequency is too low.
Increase the carrier frequency to lower the current harmonic distortion and lower the motor
temperature.
u oPE02 Error Occurs When Lowering the Motor Rated Current Setting
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.
6.9 Troubleshooting without Fault Display
206 YASKAWA SIEP YAIP1B 01A YASKAWA AC Drive – P1000 Bypass Technical Manual