Yaskawa CIMR-AU 200V Drives User Manual

Page 211

Motor hunting occurs

• Adjust the parameters that control hunting.
• Set the gain for Hunting Prevention (n1-02).
• Adjust the AFR time constant (n2-02 and n2-03).
• Adjust the speed feedback detection suppression gain for PM motors (n8-45) and the time constant for

pull-in current (n8-47).

Digital Operator Display

Fault Name

Input Phase Loss
Drive input power has an open phase or has a large imbalance of voltage between phases. Detected when

L8-05 is set 1 (enabled).

Cause

Possible Solution

There is phase loss in the drive input power

• Check for wiring errors in the main circuit drive input power.
• Correct the wiring.

There is loose wiring in the drive input power

terminals

• Ensure the terminals are tightened properly.
• Apply the tightening torque as specified in this manual.

Refer to Main Circuit Wire Gauges and

Tightening Torque on page 120

for details.

There is excessive fluctuation in the drive

input power voltage

• Check the voltage from the drive input power.
• Review the possible solutions for stabilizing the drive input power.

There is poor balance between voltage phases Stabilize drive input power or disable phase loss detection.

The main circuit capacitors are worn

• Check the maintenance time for the capacitors (U4-05).
• Replace the main capacitor(s) if U4-05 is greater than 90%. For instructions on replacing the

capacitor(s), contact Yaskawa or a Yaskawa representative.

Check for problems with the drive input power. If drive input power appears normal but the alarm

continues to occur, replace either the control board or the entire drive. For instructions on replacing the

control board, contact Yaskawa or a Yaskawa representative.

Digital Operator Display

Fault Name

PGo

PG Disconnect (for any control modes using a PG option card)
No PG pulses are received for longer than the time set to F1-14.

PGoH

PG Hardware Fault (detected when using a PG-X3 option card)
PG cable is not connected properly.

Braking Resistor Fault
The resistance of the braking resistor is too low.

Braking Resistor Overheat
Braking resistor protection was triggered.

Fault detection is enabled when L8-01 = 1 (disabled as a default).

Cause

Possible Solution

Deceleration time is too short and excessive

regenerative energy is flowing back into the

drive

• Check the load, deceleration time, and speed.
• Reduce the load inertia.
• Increase the deceleration times (C1-01 to C1-08).
• Replace the dynamic braking option with a larger device that can handle the power that is discharged.

The duty cycle is too high

Check the duty cycle. Maximum of 3% duty cycle is available when L8-01 = 1.

Excessive braking inertia

Recalculate braking load and braking power. Reduce the braking load by adjusting braking resistor

settings.

The braking operation duty cycle is too high Check the braking operation duty cycle. Braking resistor protection for ERF-type braking resistors

(L8-01 = 1) allows a braking duty cycle of maximum 3%.

The proper braking resistor has not been

installed

• Check the specifications and conditions for the braking resistor device.
• Select the optimal braking resistor.

Note:

The magnitude of the braking load trips the braking resistor overheat alarm, NOT the surface temperature. Using the braking resistor more

frequently than its rating permits will trip the alarm even when the braking resistor surface is not very hot.

Digital Operator Display

Fault Name

Dynamic Braking Transistor
The built-in dynamic braking transistor failed.

Cause

Possible Solution

5.2 Fault Detection

YASKAWA ELECTRIC TOEP C710616 41E YASKAWA AC Drive - A1000 Quick Start Guide

211

Troubleshooting