TL;DR
Refill the coolant tank to the full mark, verify the float switch moves freely, then press RESET to clear the warning.
What you might see
- low coolant
- flood coolant
- coolant pump alarm
Likely causes
Coolant tank below the float-switch trip level
Stuck float switch
Coolant pump prime lost
Required tools
- Coolant
- Refractometer (optional)
Procedure
- 1
Open the coolant tank and check fluid level.
- 2
Top up with the correct coolant mix to the FULL mark.
- 3
Lift the float switch by hand, it should move freely.
- 4
Press RESET to clear the warning.
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How to fix a coolant system failure on a Haas VF-2 CNC machining center
No coolant flow is most often low tank level, a clogged filter, or a failed pump. Check the tank level first, then clean the sump filter before replacing the pump.
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