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Digital multimeter
Metric Allen Keys
Small Flat Blade Screw Driver
Reseat the
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Connectors on the
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ECM Board and Motors
Reason: Control signals aren't reaching the electronic driver modules/servo motors.
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Continue to the next troubleshooting topic.
Inspect the DC-BUS
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Board or DC
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Power Supply
Reason: The DC-BUS or DC power supply is malfunctioning.
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Continue to the next troubleshooting topic.
Inspect the XMF1
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Transformer
Reason: The fuse(s) have blown.
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Continue to the next troubleshooting topic.
Check the K1/C1
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Contactor
Reason: The K1/C1 is defective.
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Press and hold the Reset button on the operator box and observe the K1 LED. Then release the Reset button and observe the K1 LED.
If the light only stays on when the button is pressed: There is a loose coil wire, short, or the K1 has malfunctioned.
If the light never comes on: Go back to the previous troubleshooting topics to ensure your machine is receiving power. See Machine Won't Power On - 770MX