I have been doing home hemodialysis for five and a half years and for the first time got this warning error when I first powered on the NxStage System One in preparation for setting up. 

The troubleshooting section of the NxStage manuals indicates – SCHEDULE PREVENTATIVE MAINTENANCE: PREVENTATIVE MAINTENANCE DUE (YELLOW CAUTION).     

I called NxStage Technical support and they indicated I needed to have my NxStage sent back to the factory for preventative maintenance. The good news – I could simply press the MUTE button to reset the warning error and continue with setup. This error will reoccur each time the NxStage System One is powered on until it is replaced.

NxStage sent me a new System One in about one week. Like usual, great service from NxStage. Even though I received the same warning error each time I powered the old one on, I simply pressed the MUTE button to continue setup.

The only caution I have about replacing your System One is the requirement to set the System Settings. See the NxStage User’s Guide to document all of the current System Settings on your current System One BEFORE replacing it with the new unit.

Appendix A in the User’s Guide indicates how to access the NxStage System One user settings, and documents each of those settings. While reviewing the settings on my current System One, I simply used a pencil to document the value of each setting in the User’s Manual. It made changing each of the settings on the new machine very easy.

Many of the settings did not need to be changed, but by documenting each setting from the old machine, and verifying each one on the new machine, I was confident my new machine would do exactly what the old one did during my hemodialysis treatments. 

I know it’s been a few years since I last replaced my System One due to a pump failure, but this particular error has been a very rare experience for me.