What does upper drive synchronization mean for my Pentair Water Filtration System?
- AAmanda HardinSep 5, 2025
If your Pentair Water Filtration System shows upper drive synchronization issues, it may be due to a power failure while the electronic was compiling data; the system will recover automatically within a few minutes. If the board doesn’t receive the signal from the homing microswitch (motor runs for the 6 first minutes of UD display then shows ER0), check microswitches and associated wiring.