Low Feedback/Water Fault

What does LFB/LW mean?

The iQpump has detected that the feedback signal level has fallen below the programmed threshold (P1-07) and remained below this level for the duration specified in parameter P1-08. This condition triggers a fault, causing the iQpump to coast to a stop for system protection. This fault function is only active during running in auto mode.

• Feedback signal level falling below the P1-07 (Low Feedback Level) threshold.
• Sustained low feedback level for a period exceeding P1-08 (Low Feedback Level Fault Delay Time).
• Actual low water level or insufficient process variable in the system.
• A faulty feedback transducer providing a continuously low or zero signal.

Click steps to track your progress.

1. 1

   Verify parameter P1-07 (Low Feedback Level) is set to the correct minimum allowable feedback value for the system.

2. 2

   Verify parameter P1-08 (Low Feedback Level Fault Delay Time) is set appropriately to detect sustained issues without nuisance tripping.

3. 3

   Measure the actual process variable (e.g., water level, pressure) and compare it to the feedback signal reported by the iQpump.

4. 4

   Check the feedback transducer for proper operation and inspect its wiring and connections for integrity.