Solution #1
Try not to let the Liqeufier (A) level go up to the upper limit where it will automatically switches to the IDLE mode.
On we've noticed that this behavior (outlet flow jumps to 71.11slm), happens when the cold-head heaters are ON
Solution #2
- Restart the QT-PLC by following the steps on How to restart the QT PLC
- Switch LQ-A (only) to the Run + Manual + Liqiefy mode.
- Switch LQ-B also to the Run + Manual + Liqiefy mode while LQ-A also running.
If the problem fixed, then do not need to proceed after this step. Ensure the system is in the Operational Configuration - If the problem still exists, then switch both LQs to Run + Manual + Liqiefy mode.
- Switch LQ-B (only) to the Run + Manual + Liqiefy mode.
- Switch LQ-A also to the Run + Manual + Liqiefy mode while LQ-B also running.
...