Soft Starter Error 4 Troubleshooting
Error 4 Reasons (for a GW Series Soft Starter):
- Input Power Source Voltage is not Balanced
- Check the 3-Phase Input Voltages
- A possible Settings Problem
- Can restore factory settings
- Thyristors’ main circuit or control circuit problems
- There are 3 groups of red and white cables
- One group has 2 red and white cables
- Test the resistance between each group’s red and white cable (~ 10V but up to 20V fine)
- Use buzzer position – one probe to R and one to U (S to V and T to W)
- Control Board Problems
- Check that the control board light is blinking
- Transformer Voltage
- Measure the transformer voltage
- There are 6 small cables
- Two yellow cables voltage should be about 18v to 20V
- Two green cable voltage should be about 9V
