What causes OVERLOAD ERROR 12 on a Xylem Water System and how to fix it?
- KKimberly HaysAug 23, 2025
OVERLOAD ERROR 12 on your Xylem Water System means the power limit has been exceeded because the motor current is too high. Here's what to check: 1. Verify if parameter P215/P220 RAMP 1/RAMP 2 is too short and P265 BOOST is too low. 2. Ensure the cables and connections are working correctly. 3. Check if the pump is blocked. 4. Confirm the motor rotates in the correct direction. A non-return valve defect could cause it to rotate the wrong way before running. Also, ensure that the operation point is allowed and P245 MAX.FREQ. is not too high, and check the P265 BOOST value.






