FC300
Chapter 5 Diagnostics and Troubleshooting
CHAPTER 5 DIAGNOSTICS AND TROUBLESHOOTING
Maintaining and checking the inverter on a regular basis can make your inverter’s service life
longer.
5.1 Precautions for Maintenance
Make sure inverter power supply is cut off before maintenance and inspection.
Ensure inverter power supply is cut off, display disappears, and inside high voltage light is
off, then maintenance and inspection can be carried out.
During inspection, pulling up or mismatching internal power supply & wires are forbidden,
otherwise it may cause inverter non-operation or damage.
During installation, parts like screw cannot be left inside inverter, to avoid circuit board
short-circuit.
Keep inverter clean after installation, and prevent dust, oily mist, moisture from entering in
inverter.
5.2 Regular Inspections
Confirm that power supply voltage comply with the voltage inverter needs.
(check whether there is breakage on power cord and motor)
Whether wiring terminals and contactors are loose.
(whether there is strand breakage on power cord and terminal connecting wire)
Whether there is dust, iron chip and corrosive liquid inside inverter
Measuring inverter isolation Impedance is forbidden.
Inspect inverter output voltage, output current, output frequency.
(too big difference among the measurement results is not allowed)
Check whether the surrounding temperature is within -5℃~40℃, whether the installation
environment provides good ventilation.
Humidity be kept under 90%.
(dew condensation is not allowed)
Whether there is abnormal sound or vibration during running.
(inverter cannot be positioned in the place where there is severe vibration)
Please carry out the cleaning job of keeping blowhole through on a regular basis.
5.3 Fault Display and Trouble-Shooting
FC300 series possesses comprehensive protection functions, e.g. overload, short-circuit
between phases, undervoltage, overheat, overcurrent, etc. When inverter initiates protection
actions, please find out the reasons according to the information in below table. Please do not
carry out running operation until the fault is solved. If the fault cannot be solved, please
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