n
Motor Stops During Acceleration or When a Load is Connected
Cause Possible Solution
• The load is too heavy.
• The limit of motor response may be
reached during rapid acceleration. This
may be a result of improper stall
prevention or automatic torque boost
function adjustment. (L3-01 = 2)
Increase the acceleration time (C1-01) or reduce the motor load. Also,
consider increasing the motor size and/or drive size.
n
Peripheral Devices Affected by Drive Operation
Cause Possible Solutions
Radio frequency interference may be
generated by drive output PWM
waveform.
• Change the Carrier Frequency Selection (C6-02) to lower the carrier
frequency. This will help to reduce the amount of transistor switching
noise.
• Install an Input Noise Filter at the input power terminals.
• Install an Output Noise Filter at the motor terminals.
• Use conduit. Metal can shield electrical noise.
• Ground the drive and motor.
• Separate main circuit wiring from control wiring.
n
Ground Fault Interrupter Activates When Drive is Running
Cause Possible Solutions
The output of the drive is a series of high
frequency pulses (PWM), so there is a
certain amount of leakage current. This
may cause the ground fault interrupter to
operate and cut off the drive input power.
• Change to a ground fault interrupter with a higher leakage current
detection level (such as, a sensitivity current of 200 mA or greater per
Unit, with an operating time of 0.1 s or more), or one that incorporates
high-frequency corrective actions.
• Change the Carrier Frequency Selection (C6-02) to lower the carrier
frequency.
Note: Leakage current increases in proportion to cable length.
5.8 Troubleshooting without Fault Display
150
YASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual
2/6/2008-14:44
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