6.8 Troubleshooting without Fault Display n Motor Does Not Operate When an External Run Command is Input n Motor Stops During Acceleration or When a Load is Connected n Motor Rotates in One Direction Only n Peripheral Devices Affected by Drive Operation n Ground Fault Interrupter Activates When Drive is Running 138 SIEP C710606 33A OYMC AC Drive – J1000 User Manual Cause Possible Solutions The LOCAL/REMOTE mode is not selected properly. Press the LOCAL/REMOTE button to switch. The LO/RE LED should be off for REMOTE mode. The drive is not in Drive Mode. A run command will not be issued. Exit to the Drive mode and cycle the run command. The frequency reference is too low.
• If the frequency reference is set below the frequency set in E1-09 (Minimum Output Frequency), the drive will not operate. • Raise the frequency reference to at least the minimum output frequency. 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. Increase the acceleration time (C1-01) or reduce the motor load. Also, consider increasing the motor size and/or drive size. Cause Possible Solution "Reverse run prohibited" is selected.
If b1-04 (Reverse Prohibit Operation) is set to 1 (reverse run prohibited), the drive will not accept a reverse run command. Set b1-04 = “0” to allow reverse run 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.
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.