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.

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.

3. 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