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1. Inspect the DC-BUS for power by determining if the green power light is illuminated.

   1. If it does: The motors will be illuminated.

   2. If it doesn’t: Continue to the next step.

2. Power off the machine.

3. Measure the resistance across the F6 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.

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   2. If the fuse measures 0-5 Ω, reinstall it into the DC-BUS.

4. Power on the machine and measure the Vac entering the DC-BUS on:

   1. 200 (J2)

   2. 201 (J1)

      

5. Continue to the next troubleshooting topic.

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