YASKAWA HV600, Technical Reference

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6.12 Troubleshooting Without Fault Display
522 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
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The Motor Rotates in the Opposite Direction from the Run Command
Causes Possible Solutions
The phase wiring between the drive and motor is incorrect.
•
Examine the wiring between the drive and motor.
• Connect drive output terminals U/T1, V/T2, and W/T3 in the correct sequence to agree with
motor terminals U, V, and W.
• Switch two motor cables U, V, and W to reverse motor direction.
The forward direction for the motor is set incorrectly. • Connect drive output terminals U/T1, V/T2, and W/T3 in the correct sequence to agree with
motor terminals U, V, and W.
•
Switch two motor cables U, V, and W to reverse motor direction.
Figure 6.1 Forward Rotating Motor
Note:
• For Yaskawa motors, the forward direction is counterclockwise when looking from the motor
shaft side.
• Refer to the motor specifications, and make sure that the forward rotation direction is correct
for the application. The forward rotation direction of motors can be different for different motor
manufacturers and types.
The signal connections for forward run and reverse run on the drive control
circuit terminals and control panel side are incorrect. Correctly wire the control circuit.
The motor is running at almost 0 Hz and the Speed Search estimated the speed
to be in the opposite direction. Set b3-14 = 0 [Bi-directional Speed Search = Disabled] , then the drive will only do speed search in
the specified direction.
◆
The Motor Rotates in Only One Direction
Causes Possible Solutions
The drive will not let the motor rotate in reverse. Set b1-04 = 0 [Reverse Operation Selection = Reverse Enabled] .
The drive did not receive a Reverse run signal and 3-Wire sequence is selected. Activate the terminals to which H1-xx = 0 [3-Wire Sequence] is set, and then enable reverse
operation.
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The Motor Is Too Hot
Causes Possible Solutions
The load is too heavy.
•
Decrease the load.
•
Increase the acceleration and deceleration times.
•
Examine the values set in L1-01 [Motor Overload (oL1) Protection] , L1-02 [Motor Overload
Protection Time] , and E2-01 [Motor Rated Current (FLA)] .
• Use a larger motor.
Note:
The motor also has a short-term overload rating. Examine this rating carefully before setting
drive parameters.
The motor is running continuously at a very low speed. • Change the run speed.
• Use a drive-dedicated motor.
The drive is operating in a vector control mode, but Auto-Tuning has not been
done. • Do Auto-Tuning.
• Calculate motor parameter and set motor parameters.
The voltage insulation between motor phases is not sufficient. • Use a motor with a voltage tolerance that is higher than the maximum voltage surge.
• Use a drive-dedicated motor that is rated for use with AC drives for applications that use a motor
on drives rated higher than 480 V.
• Install an AC reactor on the output side of the drive and set C6-02 = 1 [Carrier Frequency
Selection = 2.0 kHz] .
Note:
When the motor is connected to the drive output terminals U/T1, V/T2, and W/T3, surges occur
between the drive switching and the motor coils. These surges can be three times the drive input
power supply voltage (600 V for a 208/240 V bypass, 1200 V for a 480 V bypass).
The air around the motor is too hot.
•
Measure the ambient temperature.
•
Decrease the temperature in the area until it is in the specified temperature range.
The motor fan stopped or is clogged. • Clean the motor fan.
• Make the drive environment better.