Purex 400i keeps alarming after all filters are replaced.
If after replacing the filters the alarm light continues flashing:
Check the tubes that connect to the pressure sensor. Try to clear out the plastic tubes and the metal pitot tubes they connect to. If the problem persist, its either an issue with the calibration or the pressure sensor itself. Download the CALIBRATION MENU INSTRUCTIONS
- To access the setting screens, press the left and right buttons simultaneously.
- Enter the password 498 using the down button and then press right.
- Check the settings are correct. Note the max volume figures will be different on other machines.
- Press right then enter password 502 using the up button, press right.
- Check the setting are correct. 5 Check the settings are correct.
If the settings are correct, the PCB will need to be replaced (click here).
Board, Purex PCB Volume Control: MPEA-400600
Click here to download PDF Calibration Menu Instructions
Click here to download Digital Manual,
