Instruction manual

81
Details of Troubleshooting
3
SETTING WIZARD
3.4.6 External device (peripherals) malfunctions
• Causes related to overcurrent relay
• Causes related to the earth leakage current breaker
• Other causes
Cause Measures
Related
Parameters
Current is large. Execute trouble shooting of "Motor current is large" -
Leakage current is large.
(1) Decrease the setting value of PWM frequency selection (Pr. 72).
[FR-A700, F700 and F700P]
(2) Connect the EMC filter ON/OFF connector to OFF.
(1) Pr. 72
The overcurrent relay (OCR) setting is
small.
Set a value 1.1 times of 60Hz rated current. -
Cause Measures
Related
Parameters
Leakage current is large.
(1) Decrease the setting value of PWM frequency selection (Pr. 72).
(2) Use a breaker designed for harmonic and surge suppression
(3) Use a low-permittivity cable.
(4) Shorten the wiring length between the motor and inverter.
[FR-A700, F700 and F700P]
(5) Connect the EMC filter ON/OFF connector to OFF.
(1) Pr. 72
The rated sensitivity current of the earth
leakage current breaker is small
Increase the rated sensitivity current of the earth leakage current
breaker.
-
Cause Measures
Related
Parameters
The setting value of PWM frequency
selection (Pr. 72) is too large.
Decrease the setting value of PWM frequency selection (Pr. 72). Pr. 72
Electromagnetic interference
(1) Separate a signal cable from a power cable.
(2) Install a common mode choke.
(3) Use a twisted pair cable
(4) Route wires using metal conduit.
[FR-A700, F700 and F700P]
(5) Connect the EMC filter ON/OFF connector to OFF.
-
Misoperation caused by undesirable
currents when a programmable controller
is connected.
Use terminal PC as a common terminal, and perform wiring. -