Warning:

Do not attempt internal repairs on the Drive. Return any faulty Drive to the supplier for professional repair.
Trip Codes and Detailed Explanations

    UU - DC Link Under Voltage (Trip Code: 1)
+ Condition: The DC link voltage falls below the acceptable threshold.
- Possible Causes:
>> Low AC supply voltage: This could be due to unstable mains supply or issues with the incoming power quality.
>> Low DC link voltage when supplied by an external DC power source: This might occur if the external DC supply is inadequate or experiencing drops in voltage.

    OU - DC Link Over Voltage (Trip Code: 2)
+ Condition: The DC link voltage exceeds the maximum allowable limit.
- Possible Causes:
>> Excessive inertia in the machine during deceleration: When a machine with high inertia decelerates too quickly, it can cause regenerative energy to flow back into the DC link, raising its voltage.
>> Deceleration rate set too fast for the machine’s inertia: If the deceleration parameter is too aggressive, it doesn’t allow sufficient time for energy dissipation, leading to overvoltage.

    OI.AC - AC Instantaneous Over Current (Trip Code: 3)
+ Condition: The Drive detects a surge in AC current that exceeds its instantaneous trip level.
- Possible Causes:
>> Insufficient ramp times: Ramp-up or ramp-down times that are too short can cause large inrush currents.
>> Phase-to-phase or phase-to-earth short circuit at the Drive output: This is a critical fault indicating possible wiring issues or insulation failures.
>> The Drive may require autotuning to the motor (refer to parameter 38): Mismatch in Drive and motor characteristics necessitates autotuning for optimal performance.

    OI.br - Overcurrent on Braking IGBT (Trip Code: 4)
+ Condition: Excessive current detected in the braking IGBT circuit.
- Possible Causes:
>> Excessive current in braking resistor: Indicates that the braking resistor might be undersized or not adequately rated for the braking power required.
>> Braking resistor value too small: A smaller braking resistor can lead to higher current levels, risking damage to the braking circuit. (This trip does not apply to Size 1 units.)

    Et - External Trip (Trip Code: 6)
+ Condition: An external trip command is activated.
- Possible Causes:
>> The external trip terminal has opened: This could be due to an external safety interlock, emergency stop activation, or external fault condition when configured to do so.

    O.SP - Over Speed (Trip Code: 7)
+ Condition: The motor speed exceeds the maximum speed setpoint.
- Possible Causes:
>> Excessive motor speed, typically caused by the mechanical load driving the motor beyond its set limits, possibly due to feedback issues or runaway conditions.

    tunE - Auto-Tune Failure (Trip Code: 18)
+ Condition: The Drive fails to complete the autotuning procedure.
- Possible Causes:
>> Motor loaded or no motor connected: Autotuning requires an unloaded motor and proper connection. Any deviation can lead to failure in the tuning process.

    It.br - Ixt on Braking Resistor (Trip Code: 19)
+ Condition: Excessive energy is dissipated in the braking resistor.
- Possible Causes:
>> Braking resistor energy limit exceeded: Indicates that the braking resistor’s capacity is being overrun, possibly requiring a higher-rated resistor or a review of the braking cycle energy requirements. (Not applicable to Size 1 units.)

    It.AC - Motor Overload on Current x Time (Trip Code: 20)
+ Condition: The motor experiences an overload condition based on the current-time characteristic.
- Possible Causes:
>> Excessive mechanical load: The motor is likely overloaded, possibly due to high torque demands or mechanical binding.

    Oht1 - Overheat (Thermal Model) (Trip Code: 21)
+ Condition: The Drive has overheated based on its thermal model.
- Possible Causes:
>> The thermal model predicts overheating due to continuous high load, poor ventilation, or ambient temperature exceeding design specifications.

    Oht2 - Overheat (Heatsink Thermistor) (Trip Code: 22)
+ Condition: The temperature of the heatsink thermistor exceeds 95°C (203°F).
- Possible Causes:
>> This may result from inadequate cooling, blocked airflow, or external thermal influences causing the heatsink to rise beyond its safe operating range.

Diagnostic Insights:

For each trip condition, it is essential to assess both the Drive parameters and the external conditions affecting its operation. Proper parameter tuning, adequate ventilation, ensuring correct load characteristics, and regular maintenance can help prevent these trips from occurring. If a trip persists, professional consultation with the Drive’s supplier or a qualified technician is recommended to avoid further damage.