Haas 151 alarm: Low pressure HPC/TSC

Haas detects low pressure in high-pressure coolant or through-spindle coolant. It is an alarm from the Coolant area, and in the catalog it is listed as “Low pressure HPC/TSC”. On the machine you notice it like this: Alarm when activating TSC/HPC, Insufficient flow per tool, It may stop the cycle.

On the shop floor it almost always comes from one of these causes: Filtro obstruido, Nivel bajo, Bomba HPC/TSC, Tool without internal passage or clogged nozzle. Rule out the most likely one on your machine first, before touching parameters or swapping anything.

Reset after recovering pressure. Resetting without fixing the cause first only hides the problem: Haas 151 trips again and, in the meantime, you keep working with the machine in bad shape.

With the machine stopped and in a safe state, start with these checks: Revisar nivel/filtros, Check tool and tool holder, Test the pump without cutting. That alone will tell you whether it is the program or whether you need to raise a maintenance job.

With Haas 151 active, avoid this: Do not bypass safety devices, Do not manipulate energized electrical cabinet, Do not continue producing if the alarm reappears. Skipping any of these points is what turns a minor stop into an expensive breakdown.

If the pump does not increase pressure after cleaning filters and checking the level. If you are not sure how far it goes, stop the machine and report it: a repeat alarm always works out cheaper than a crash.

It is a warning: the machine carries on, but it is flagging something that will get worse if you let it go. Deal with it between parts, not at the end of the shift. Guidance reference. Always confirm the full text in the exact machine/control manual.