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Coolant Pump Won't Run - 15L

Background

The coolant systems are controlled with the following G-code (M-code) commands:

  • M08 (flood)

  • M09 (deactivate all coolant)

When PathPilot identifies those commands it causes a component on the control board to power, or remove power, to the coolant pump.

Tools

  • Digital multimeter

  • Screw Driver

  • Box Wrench or Crescent Wrench

Reseat the coolant pump power cord

Reason: The coolant pump isn't plugged in to an outlet.

  1. Unplug and reseat the coolant pump power cord.

Inspect the coolant pump strapping

Reason: The coolant pump isn't strapped for your machine power.

  1. Open the box on the side of your pump. Check the strapping compared to the diagram on your pump.

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Inspect fuse FU11 on the machine control board

Reason: Fuse F11 on the machine control board is blown.

  1. Power off the machine.

  2. Locate and remove the F11 fuse from the machine control board.

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15L FU11 Fuse Location
  1. Measure the resistance across the fuse with digital multimeter set to resistance.

    1. Replace the fuse if the digital multimeter reads OL, shows a resistance in the MΩ, and/or doesn’t produce continuity tone.

    2. If the fuse measure 0-5 Ω, reinstall it into the machine control board.

If the coolant pump shorts, the 8 A, FU11 flood coolant fuse on the control board blows before the FU1, FU2, or FU6. https://tormach.com/fuse-5x20-glass-8a-217-series-31655.html