Pre-charge Alarm

What does Pre-charge mean?

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.

• The feedback signal exceeds the programmed P4-01 (Pre-Charge Level) during the pre-charge operation.
• The maximum allowed pre-charge time, set by P4-03 (Pre-Charge Time), has expired.
• The low water digital input (H1-XX = 85) becomes deactivated, indicating a low water condition during pre-charge.

Click steps to track your progress.

1. 1

   Verify the feedback signal and compare it to the P4-01 (Pre-Charge Level) setting; adjust P4-01 if the level is incorrect for the application.

2. 2

   Check the P4-03 (Pre-Charge Time) parameter; ensure it is set appropriately for the system's pre-charge duration.

3. 3

   Monitor the status of the low water digital input connected to terminal H1-XX and verify it is active (e.g., 24VDC) if low water deactivation is the cause.

4. 4

   Ensure the system is adequately filled with water or fluid before activating the pre-charge function.