YASKAWA CIMR-JC4A0002BAA Quick Start Manual page 157

5.8 Troubleshooting without Fault Display
n Output Frequency is not as High as Frequency Reference
Cause
Frequency reference is set within the
range of the Jump Frequency.
Upper limit for the frequency reference
has been exceeded.
Large load triggered Stall Prevention
function during acceleration.
n Buzzing Sound from Motor at 2 kHz
Cause
Exceeded 110% of the rated output
current of the drive while operating at low
speeds.
n Motor Does Not Operate When the RUN Button on the Digital
Operator is Pressed
Cause
The LOCAL/REMOTE mode is not
selected properly.
The drive is not in drive mode.
The frequency reference is too low.
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.
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• Adjust the parameters used for the Jump Frequency function (d3-01,
d3-02).
• Enabling the Jump Frequency prevents the drive from outputting the
frequencies specified in the Jump Frequency range.
• Set the maximum output frequency and the upper limit for the frequency
reference to more appropriate values (E1-04, d2-01).
• The following calculation yields the upper value for the output
frequency = E1-04 x d2-01 / 100
• Reduce the load.
• Adjust the Stall Prevention level during acceleration (L3-02).
• If the output current rises too high at low speeds, the carrier frequency
automatically reduces and causes a whining or buzzing sound.
• If the sound is coming from the motor, disable carrier frequency derating
(L8-38 = "0").
• Disabling the automatic carrier frequency derating increases the chances
of an overload fault (oL2). Switch to a larger capacity motor if oL2 faults
occur too frequently.
Press the LOCAL/REMOTE button to switch. The LO/RE LED should be
on for LOCAL 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.
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.
YASKAWA ELECTRIC TOEP C710606 26B YASKAWA AC Drive – J1000 Quick Start Guide
http://nicontrols.com
Possible Solutions
Possible Solutions
Possible Solutions
Possible Solutions