How do you do maintenance on a VFD?
Low Voltage VFD preventive maintenance is best performed on a periodic schedule, typically once per year. Consists mainly of visual inspection, cleaning with dry compressed air, checking connections for correct torque and setting up a replacement schedule for those components with the shortest operational life cycles.
How long should a VFD last?
The Short Answer. Most manufacturers will admit the typical life expectancy is about 7-12 years … but there are many factors at play. VFD components like fans and capacitors have a finite life and starting at about 5 years, these components can start to fail and will need to be replaced.
How do you troubleshoot a VFD?
Troubleshooting VFD Problems
- Check the system with a good visual inspection.
- Clean the drive of dirt, dust and corrosion.
- Check all wiring connections for tightness.
- Check the line voltages and currents coming into the drive.
- Check the drive output for voltage and current.
What can cause a VFD to fail?
Common Causes of VFD Failure
- Keeping Your VFD Maintained. The first thing you should know when purchasing a VFD is to keep it clean, cool, and dry.
- Poor Environment.
- Loose Connections.
- Wrong Equipment.
- Overuse.
- High Bus Fault.
- Overcurrent Fault.
- High Starting-Load Current.
How do you tell if a VFD is going bad?
Loose connections are among the most common causes of faulty operation in VFD applications. Just eyeballing a connection is sometimes enough to know it’s loose. You can also check for a voltage drop across the connection if you’re still powered up – or resistance through a connection if you’re powered down.
What causes VFD failure?
Loose power connections cause overvoltage or overcurrent, blown fuses, and inevitably VFD damage. Loose wiring can cause erratic drive performance. This can result in unpredictable speed fluctuations and an inability to control your VFD.
Is VFD bad for motor?
VFDs can also limit a motor’s starting in-rush current, reduce electrical peak demand charges, and can ramp up the motor speed to a control setpoint. …