3.11 Problems that Can Frequently Occur during Setup and Possible Solutions
236
YASKAWA
SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
◆
The Motor Is Making an Audible Noise
Causes
Possible Solutions
100% of the rated output current of the drive was exceeded while operating
at low speeds.
•
If the sound is coming from the motor, set
L8-38 = 0 [Carrier Frequency Reduction =
Disabled]
.
•
If
oL2 [Drive Overloaded]
occurs frequently after setting
L8-38 = 0
, replace the drive with a
high-capacity drive.
◆
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.
•
Set
A1-02 = 0 [Control Method Selection = V/f Control]
.
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 400 V class.
•
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 200 V class drive, 1200 V for a 400 V class
drive).
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.
◆
There Is Audible Noise from the Drive or Motor Cables when You Energize the
Drive
Causes
Possible Solutions
The relay switching in the drive is making too much noise.
•
Use
C6-02 [Carrier Frequency Selection]
to decrease the carrier frequency.
•
Connect a noise filter to the input side of the drive power supply.
•
Connect a noise filter to the output side of the drive.
•
Isolate the control circuit wiring from the main circuit wiring.
•
Use a metal cable gland to wire the drive.
•
Shield the periphery of the drive with metal.
•
Make sure that the drive and motor are grounded correctly.
•
Make sure that ground faults have not occurred in the wiring or motor.
◆
Residual Current Monitoring/Detection (RCM/RCD) Trips During Run
Causes
Possible Solutions
There is too much leakage current from the drive.
•
Increase the RCM/RCD sensitivity or use RCM/RCD with a higher threshold.
•
Use
C6-02 [Carrier Frequency Selection]
to decrease the carrier frequency.
•
Decrease the length of the cable used between the drive and the motor.
•
Install a noise filter or AC reactor on the output side of the drive. Set
C6-02 = 1 [2.0 kHz]
when connecting an AC reactor.
•
Disable the internal EMC filter.
◆
Flux Compensation (Current Suppression at Start)
Find motor torque using the following formula.
Summary of Contents for CR700
Page 1: ......
Page 244: ...3 13 Test Run Checklist 244 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual ...
Page 422: ...7 7 Storage Guidelines 422 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual ...
Page 426: ...8 2 Disposal Instructions 426 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual ...
Page 837: ...EZZ023535 2 35 1 Revision History Revision Revised Content Date First Edition 2017 08 ...
Page 872: ...EZZ023536 2 16 Revision History Revision Revised Content Date First Edition 2017 08 ...