YASKAWA E1000 User Manual

6.10 Troubleshooting without Fault Display
292 YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual
◆ Drive Frequency Reference Differs from the Controller Frequency Reference
Command
◆ Excessive Motor Oscillation and Erratic Rotation
◆ Deceleration Takes Longer Than Expected with Dynamic Braking Enabled
◆ Noise From Drive or Motor Cables When the Drive is Powered On
◆ Earth Leakage Circuit Breaker (ELCB) Trips During Run
Incorrect frequency reference setting.
• Check the multi-function analog input settings. Multi-function analog input terminal A1, A2, or A3 is set for
frequency gain (H3-02, H3-10, or H3-06 is set to “1”), but there is no voltage or current input provided.
• Make sure H3-02, H3-10, and H3-06 are set to the proper values.
• See if the analog input value is set to the right value (U1-13 to U1-15).
The Stall Prevention level during acceleration and deceleration set
too low.
• Check the Stall Prevention level during acceleration (L3-02).
• If L3-02 is set too low, acceleration may be taking too long.
• Increase L3-02.
The Stall Prevention level during run has been set too low.
• Check the Stall Prevention level during run (L3-06).
• If L3-06 is set too low, speed will drop as the drive outputs torque.
• Increase the setting value.
Drive reached the limitations of the V/f motor control method.
• The motor cable may be long enough (over 50 m) to require Auto-Tuning for line-to-line resistance.
• Be aware that V/f Control is comparatively limited when it comes to producing torque at low speeds.
• Consider switching to Open Loop Vector Control.
Cause Possible Solutions
The analog input gain and bias for the frequency reference input
are set to incorrect values.
• Check the gain and bias settings for the analog inputs that are used to set the frequency reference. Check parameters
H3-03 and H3-04 for input A1, check parameters H3-11 and H3-12 for input A2, and check parameters H3-07 and
H3-08 for input A3.
• Set these parameters to the appropriate values.
A frequency bias signal is being entered via analog input terminals
A1 to A3.
• If more than one of multi-function analog inputs A1 to A3 is set for frequency reference bias (H3-02, H3-10, or H3-06
is set to “0”), then the sum of all signals builds the frequency reference.
• Make sure that H3-02, H3-10, and H3-06 are set appropriately.
• Check the input level set for terminals A1 to A3 (U1-13 to U1-15).
PI control is enabled, and the drive is consequently adjusting the
output frequency to match the PI setpoint. The drive will only
accelerate to the maximum output frequency set in E1-04 while PI
control is active.
If PI control is not necessary for the application, disable it by setting b5-01 to “0”.
Cause Possible Solutions
Poor balance between motor phases. Check drive input power voltage to ensure that it provides stable power.
Hunting prevention function is disabled. Enable Hunting Prevention (n1-01 = 1).
Cause Possible Solutions
L3-04 is set incorrectly.
• Check the Stall Prevention level during deceleration (L3-04).
• If a dynamic braking option has been installed, disable Stall Prevention during deceleration (L3-04 = 0).
The deceleration time is set too long. Set deceleration to more appropriate time (C1-02).
Insufficient motor torque.
• Assuming parameter settings are normal and that no overvoltage occurs when there is insufficient torque, it is likely
that the demand on the motor has exceeded the motor capacity.
• Use a larger motor.
Reaching the torque limit.
• If multi-function analog input terminal A1, A2, or A3 is set to torque limit (H3-02, H3-10, or H3-06 equals 10, 11, 12,
or 15), ensure that the analog input levels are set to the correct levels.
• Ensure H3-02, H3-10, and H3-06 are set to the right levels.
• Ensure the analog input is set to the correct value (U1-13 to U1-15).
Load exceeded the internal torque limit determined by the drive
rated current.
Switch to a larger capacity drive.
Cause Possible Solutions
Relay switching in the drive generates excessive noise.
• Lower the carrier frequency (C6-02).
• Install a noise filter on the input side of drive input power.
• Install a noise filter on the output side of the drive.
• Place the wiring inside a metal conduit to shield it from switching noise.
• Ground the drive and motor properly.
• Separate the main circuit wiring and the control lines.
• Make sure wires and the motor have been properly grounded.
Cause Possible Solutions
Excessive leakage current trips ELCB.
• Increase the ELCB sensitivity or use ELCB with a higher threshold.
• Lower the carrier frequency (C6-02).
• Reduce the length of the cable used between the drive and the motor.
• Install a noise filter or reactor on the output side of the drive. Set the carrier frequency to 2 kHz when connecting a
reactor.
Cause Possible Solutions
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YASKAWA E1000 Specifications

General

Brand	YASKAWA
Model	E1000
Category	Controller
Language	English