PowerFlex 40 and 400 Drive Control Logic
| Fault | Description | Corrective Action/ |
| Remarks | ||
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003 | Power Loss Fault | DC Bus voltage remains below | Monitor incoming AC line for low voltage or line power |
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| 85% nominal for longer than .5 | interruption. |
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| seconds. |
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004 | Under Voltage Fault | DC Bus voltage fell below | Monitor AC incoming AC line for low voltage or line |
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| minimum. | power interruption. |
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005 | Over Voltage Fault | DC Bus maximum voltage | Monitor the AC line for high line voltage or transient |
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| exceeded. | conditions. High voltage can result from motor |
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| regeneration. Buck transformer may be required. |
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006 | Motor Stall | Motor has stalled. Motor load is | Check motor wiring and connection terminals. Check wash |
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| excessive. | basket freedom of movement and excess belt tension. |
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007 | Motor Overload Fault | Internal electronic overload trip. | Check motor wiring and connection terminals. Check wash |
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| Excessive motor load exists. | basket freedom of movement and excess belt tension. |
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008 | Over Temperature Fault | Excessive heat detected by | Clear blocked or dirty heatsink fins. Check ambient |
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| heatsink transducer. | temperature. Check for blocked or nonoperating fan. |
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012 | Overcurrent Fault | Overcurrent detected in | Check short circuit at the controller output or excessive |
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| instantaneous hardware trip circuit. | load conditions at motor. |
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024 | Unable to Decelerate | DC Bus regulation prevents | Verify DC Bus (d005) is less than 340V for |
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| machine from decelerating | applications or 680V for |
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| typically due to high input voltage, | an imbalanced wash load. Check for proper speed |
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| motor regeneration or unstable | increment through all extract speeds. |
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| motor operation. |
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033 | Max Retries Fault | Controller failed to reset fault | Fault exists that must be corrected before further operation. |
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| within the number of retries. | Check “Fault Buffer 1” on 1305 and 1336 for specific fault |
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| that triggered max retries fault. |
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038 | Phase U Fault | Check wiring between the drive and motor. Check for | |
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| between controller and motor in | grounded phase. |
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| Phase U. |
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Table 20 (continued)
F232120 | © Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT | 33 |