Yaskawa iQp1000 AC Drive

The iQpump VTC initiates a “High Feedback Fault (HFB)” when the feedback level rises above the programmed level (P1-11) for a time specified in P1-12. Upon fault occurrence, the iQpump VTC will coast to a stop. This function is active during running in all operation modes.

The iQpump VTC displays a “Low Feedback/Water (LFB/LW)” fault when the feedback level falls below the programmed level (P1-08) for a time specified in P1-09. When this fault occurs, the iQpump VTC will coast to a stop. This function is only active during running while operating in the auto mode.

The iQpump VTC operator display indicates a “Pre-charge” alarm when the pre-charge function is active. The iQpump VTC will stop when the feedback signal rises above the P4-01 level, the pre-charge timer P4-03 expires, or the low water digital input (H1-XX = 85) is deactivated. This alarm is only active in the stopped mode.