Troubleshooting
Check first when you have troubles
FR-E700 SC EC/ENE
7 - 25
7.6.2
Motor or machine generates abnormal noise
7.6.3
Inverter generates abnormal noise
7.6.4
Motor generates heat abnormally
Check Points
Possible Cause
Countermeasures
Refer to
Page
Input signal
Disturbance due to EMI when frequency
command is given from analog input (termi-
nal 2, 4).
Take countermeasures against EMI.
Parameter
setting
Increase the Pr. 74 "Input filter time constant"
if steady operation cannot be performed due
to EMI.
Parameter
setting
No carrier frequency noises (metallic noises)
are generated.
In the initial setting, Pr. 240 "Soft-PWM opera-
tion selection" is enabled to change motor
noise to an unoffending complex tone.
Therefore, no carrier frequency noises (metal-
lic noises) are generated.
Set Pr. 240 = "0" to disable this function.
Resonance occurs (output frequency)
Set Pr. 31 to Pr. 36 "Frequency jump".
When it is desired to avoid resonance attrib-
utable to the natural frequency of a mechani-
cal system, these parameters allow resonant
frequencies to be jumped.
Resonance occurs (carrier frequency)
Change Pr. 72 "PWM frequency selection"
setting.
Changing the PWM carrier frequency pro-
duces an effect on avoiding the resonance
frequency of a mechanical system or a motor.
Auto tuning is not performed under
Advanced magnetic flux vector control or
General-purpose magnetic flux vector con-
trol.
Perform offline auto tuning.
Gain adjustment during PID control is insuffi-
cient.
To stabilize the measured value, change the
proportional band (Pr. 129) to a larger value,
the integral time (Pr. 130) to a slightly longer
time, and the differential time (Pr. 134) to a
slightly shorter time.
Check the calibration of set point and meas-
ured value.
Others
Mechanical looseness
Adjust machine/equipment so that there is
no mechanical looseness.
—
Motor
Operating with output phase loss
Check the motor wiring.
—
Contact the motor manufacturer.
Check Points
Possible Cause
Countermeasures
Refer to
Page
Fan
Fan cover was not correctly installed when a
cooling fan was replaced.
Install a fan cover correctly.
Check Points
Possible Cause
Countermeasures
Refer to
Page
Motor
Motor fan is not working
(Dust is accumulated.)
Clean the motor fan.
Improve the environment.
—
Phase to phase insulation of the motor is
insufficient.
Check the insulation of the motor.
—
Main circuit
The inverter output voltage (U, V, W) are
unbalanced.
Check the output voltage of the inverter.
Check the insulation of the motor.
Parameter
setting
The Pr. 71 "Applied motor" setting is wrong.
Check the Pr. 71 "Applied motor" setting.
—
Motor current is large.
Refer to "7.6.11 Motor current is too large"
Summary of Contents for fr-e700 series
Page 2: ......
Page 4: ......
Page 20: ...Contents XVI ...
Page 112: ...Operation panel Operation 4 20 ...
Page 154: ...External operation Basic settings 5 42 ...
Page 528: ...CC Link IE Field Network Basic Parameter 6 374 ...
Page 562: ...Meters and measuring methods Troubleshooting 7 34 ...
Page 606: ...A 30 Index Appendix ...
Page 607: ......