Originally Posted by mjeffrey
To reset the One Place system hold down the "pump", "tank" and "battery" buttons (all 3 at the same time) for 10 or so seconds. The version number will display. Then press the "battery" button to reactivate.
Last time ours started reporting the black tank in quarters instead of thirds I also had to turn off everything at the "coach" button up front.
Found the real instructions: (which refer to a picture)
To Reset the Panel to Default
1. Press and hold all three buttons shown above ["pump", "tank" and "battery"] for approximately 6 seconds, until the
above screen appears.
2. Press the Default Button (Water Pump)
3. Press the Exit Button (Battery Level).
4. The Panel will return to the Water Pump Display
I believe you have to do steps 2 and 3 right away or it doesn't really reset. So if this didn't work, it may not really be reset.
Don't be alarmed if the water heater (elec and LP) options disappear. They will show up when you press the button.