Table 6.1 – Resistance Checks
Input | Meter |
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Diode | Connection |
| Component is OK if |
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No. | (+) |
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| resistance (R) is: | Component is defective if: | |
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1 | * |
| SCR1 |
| 10 < R < 1 megohm | Continuity (short circuit) or |
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| open when the meter is |
2 | * |
| SCR2 |
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| connected with reversed | |||
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3 | * |
| SCR3 |
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| polarity. |
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4 | * |
| SCR4 |
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5 | * |
| SCR5 |
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6 | * |
| SCR6 |
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7 | SCR1 | ** |
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8 | SCR2 | ** |
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9 | SCR3 | ** |
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10 | SCR4 | ** |
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11 | SCR5 | ** |
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12 | SCR6 | ** |
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* (+) DC Bus Volts power terminal |
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** |
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| Table 6.1 - Resistance Checks (Continued) | ||
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| Meter |
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IGBT | Connection |
| Component is OK if |
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No. | (+) |
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| resistance (R) is: | Component is defective if: | |
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1 | * | W/T3 |
| 10 < R < 1 megohm | Continuity (short circuit) or | |
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| open when the meter is |
2 | * | V/T2 |
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| connected with reversed | ||||
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3 | * | U/T1 |
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| polarity. | |
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4 | W/T3 |
| ** |
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5 | V/T2 |
| ** |
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6 | U/T1 |
| ** |
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* (+) DC Bus Volts power terminal **
Troubleshooting the Drive |
