Why are the LEDs on my Pfeiffer Vacuum HILOBE 2704 Water Pump's operator panel not working correctly?
- AAmber MooreSep 14, 2025
If the LEDs on the operator panel of your Pfeiffer Vacuum Water Pump don't match the pump's operating state (e.g., LED status is “off” even though voltage supply is present), it could be due to a defective operator panel circuit board caused by overvoltage or a faulty pin assignment at the “remote”. Another possibility is that 24 V is applied via a third-party power supply with deviating potential.