ATV 28 fault codes
Precautions:
- Read safety statements before proceeding with maintenance or troubleshooting.
- Procedures are intended for qualified electrical maintenance personnel.
Routine Maintenance:
- Check the condition and tightness of connections.
- Ensure effective ventilation and acceptable temperature around the drive controller.
- Remove dust and debris from the drive controller if necessary.
Fault Detection:
- If a fault is detected, the drive controller trips and the fault relay de-energizes unless automatic restart (Atr) is active.
- Fault codes, probable causes, and corrective actions are listed in the manual. Verify no voltage on the DC bus before taking corrective action.
Procedure 1: Checking the Supply Voltage:
- Remove all input line voltage.
- Attach meter leads to L1 and L2, set the voltmeter to the 600 Vac scale.
- Reapply power and check for the correct line voltage according to the drive controller nameplate rating.
- Remove power and repeat the procedure for L2 and L3, and L1 and L3 if wired for three-phase.
- Remove power, remove leads, and reinstall covers.
Procedure 2: Checking the Peripheral Equipment:
- Check for tripped protective devices, incorrectly closing switching devices, damaged conductors, and loose connection cables to the motor or ground.
Fault Storage:
- An existing fault is saved and displayed on the keypad as long as power is maintained.
- To reset the fault: remove power, identify and correct the cause, and restore power. The fault resets if corrected.
- If automatic restart is enabled, the drive controller may automatically restart after the cause of the fault has disappeared.
Note: Use appropriately-rated measuring equipment as bus voltage can exceed 1000 Vdc. Follow NEMA standard procedure WC-53 for checking loose connection cables.
- OHF (Drive Controller Overload):
- Description: Continuous motor current load too high or ambient temperature too high.
- Corrective Actions: Check the motor load, the drive controller ventilation, and the environment. Wait for the controller to cool before restarting.
- OLF (Motor Overload):
- Description: Thermal trip due to prolonged motor overload or motor power rating too low for the application.
- Corrective Actions: Check the setting of the motor thermal protection (ItH). Check the motor load. Wait for the motor to cool before restarting.
- OSF (Overvoltage During Steady State Operation or During Acceleration):
- Description: Line voltage too high.
- Corrective Actions: Check the line voltage. Compare with the drive controller nameplate ratings. Reset the drive controller.
- USF (Undervoltage):
- Description: Input voltage too low, transient voltage dip, or damaged braking resistor.
- Corrective Actions: Check the line voltage. Check the setting of parameter UnS. Replace the braking resistor if needed.
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