1. Immediately shut down the equipment safely and disconnect the power supply. Wait for at least the time specified on the inverter.
2. Replace the damaged capacitor. Bulging capacitors are irreversible and cannot be repaired; replacement is mandatory. Use a capacitor of the same model and specifications, or replace it with a capacitor board provided by INVT. Before removing the old capacitor, take a photo of its wiring configuration with your phone to ensure the new capacitor is connected correctly. Note the polarity (electrolytic capacitors are polarized). Carefully remove the old capacitor and securely install the new one. Ensure terminals are tightened to prevent poor contact and overheating.
3. Causes and Prevention
1) Excessive Ambient Temperature: Poor ventilation at the inverter installation site, high ambient temperature, or dust clogging the heat sink.
Countermeasure: Improve ventilation conditions, clean the cooling fan and air ducts, ensure sufficient space around the inverter, and install air conditioning or forced ventilation equipment if necessary.
2) Capacitor Aging: Capacitors are consumables with a limited lifespan (typically several years), and aging accelerates in harsh environments.
Countermeasure: For inverters reaching their service life or in critical applications, consider implementing preventive maintenance with regular inspections or capacitor replacements.
3) Harmonic currents or overvoltage: Unstable grid voltage, frequent emergency stops/starts, or significant load fluctuations can cause DC bus voltage fluctuations or generate substantial harmonics, intensifying capacitor heating.
Countermeasure: Monitor grid voltage. Install input reactors in locations with significant grid fluctuations.
4) Component failure: Issues like rectifier bridge malfunctions allowing AC leakage into the DC side can accelerate capacitor damage.
Countermeasure: After capacitor replacement, have a professional conduct a comprehensive inspection.
FAF means Forced Communication Failure, probably not receiving AC input in AC mode, VFD wants to switch to AC input, but no AC input, also caused by the mode change. this is an early warning, not a fault. It means that you are using Hybrid power supply mode, but there is no AC input. You only need to connect the AC input, or change the mode back to mode 0.
Yes, after removing the STO expansion card, you need to set P08.63=0 (invalid STO function), and then change the position of the jumper cap on the control board.
GD350 can support Closed-loop vectorcontrol, need to use optional PG card. More details please see attached manual.
It is mainly used to prevent silk folding. When the winding diameter is at a specific value, the trajectory of the first repeated action will achieve the effect of coincidence. Too many yarns overlap to form silk folding, which brings hidden dangers to the unwinding of the next process. Therefore, it is necessary to add swing frequency, which is equivalent to adding appropriate disturbance in the regular operation process.
Tension has a great impact on spinning forming, and different sizes of spindles have different requirements for tension. Therefore, different speeds should be set according to different processes and spinning stages to accurately meet the needs of tension.
Pay attention to the anti reversal at the moment of starting the permanent magnet synchronous motor, and pay attention to the demagnetization of the synchronous motor caused by high ambient temperature.
The high temperature and humidity at the textile site have blocked the cooling air duct of the VFD and damaged the fan. The oil stain and corrosivity at the chemical fiber textile site are easy to produce friction static electricity at the chemical fiber textile site. Pay attention to moisture and corrosion prevention at the printing and dyeing site.
Fiirst, please check the closed-loop setting parameters are ok, according to the guide of operation manual. Then do below steps:
1. Please check P20.05=0x33 or not;
2. P20.11, do auto-tuning;
3. Check that the connection between encoder and motor is normal or fixed;
4. Try to fix the motor to test, and observe the output current;
5. Please set the speed to 30 or 40Hz to see the performance.
Our site uses cookies to provide you with a better onsite experience. By continuing to browse the site you are agreeing to our use of cookies in accordance with our Cookie Policy.
