Table 5-3 Converter Section Troubleshooting Continued
INDICATION | POSSIBLE CAUSE | CORRECTIVE ACTION |
|
|
|
Over Current FLT | Possible converter transistor failure. | Check transistors for shorted junctions. |
|
|
|
| Incorrect inductance set in Line | Check inductance parameter value. |
| Inductor parameter. |
|
|
|
|
Overload FLT | Drive overloaded. | Verify proper sizing of control and motor. |
|
|
|
PWR Base FLT | Incorrect phase connections. | Check connections for proper phasing of EK drive components as |
|
| detailed in Section 3 of this manual. |
|
|
|
| Excessive current draw. | Disconnect motor wiring and retry test. If fault remains, call Baldor. |
|
| |
| Power device saturated. | |
|
| |
|
|
|
| Electrical noise from DC coils. | Install flyback diodes (reverse biased 1N4002 or equivalent)across all |
|
| external DC relay coils.. |
|
|
|
| Electrical noise from AC coils. | Install RC snubbers on all external AC coils. |
|
|
|
Sync To Line | Incorrect phase connections. | Check connections for proper phasing as detailed in Section 3 of this |
|
| manual. |
|
|
|
| Incorrect frequency detected at | Check incoming line voltage and frequency. |
| startup. |
|
|
|
|
| MN722 |
