Omron J1000 User Manual page 140

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