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| Quad Amp Hardware Reference Manual |
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Motor moves after a | Verify if the bus voltage sags when | Call Delta Tau for an RMA. |
command is issued but | the motor is commanded to move. |
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under voltage fault | The Main IGBT probably does not |
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comes on shortly after. | turn on. Check if the wiring between |
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Also, the Soft Start | E1 and G1 (of Main IGBT) and |
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resistor heats up (and | 6 (Soft Start board) is okay. Then |
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possibly burns). | verify if G1 with respect to E1 |
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| switches from approx. |
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| +15 VDC after the Main power is |
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| turned on. If it does, the Main IGBT |
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| is probably open. If it does not, the |
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| problem is most likely with the Soft |
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| Start board. |
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Under voltage fault | Check if there is bus voltage across | If not, examine if the |
stays displayed even | 15k Ohm bleed resistor. | the Soft Start and the I/O Logic board is |
after several enable |
| connected on both sides and in good shape. |
commands. |
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32 | Troubleshooting |