| Problem | If | Possible cause | Because | Solutions | Resources |
| Spindle does not spin | No alarms or Intermittent Lost 485 communication error, fixes itself after complete shut down | 485 communication problem | Internal inverter system froze and/or error CoF on inverter screen | Turn off enable key for 2 minutes then on again and power on machine, problem can be prevented by adding in pmodbus an address 0 before and after the inverter |
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| No alarms or Permanent 485 communication error, problem does not fix itself after a complete shut down | 485 communication problem | Bad communication cable, or spoiled 485 hardware | check the 485 plugs from the computer, make sure polarity is correct, replace cable from 485 plug to inverter, if problem persist replace inverter 485 card and or CNC 485 card | ||
| There are no alarms on spindle inverter | Inverter is off |
Check Inverter Breaker |
Flip up inverter breaker 5Q6 or 6Q5 depending on machine |
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| Inverter is damaged | replace inverter | ||||
| There are alarms on spindle inverter | Various causes depending on error code | check inverter digital screen inside electrical panel to check error code |
Find resolution inside inverter manual page 163
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