UU 1: DC link under voltage (continuation >>)
OU 2: DC link over voltage (continuation >>)
OI.AC 3: AC instantaneous over current trip (continuation >>)
OI.br 4: Overcurrent on braking IGBT (continuation >>)
Et 6: External trip (continuation >>)
O.SP 7: Over speed (continuation >>)
tunE 18: Auto-tune failure (continuation >>)
It.br 19: Ixt on braking resistor (continuation >>)
It.AC 20: Motor overload on current x time (continuation >>)
Oht1 21: Overheat (Overheat thermal model) (continuation >>)
Oht2 22: Overheat (heatsink thermistor) (continuation >>)
th 24: Over temperature (Motor thermistor) (continuation >>)
O.Ld1 26: +24V or digital output overload (continuation >>)
cL 28: Current loop loss on terminal 5 (continuation >>)
SCL 30: User serial communications watchdog failure (continuation >>)
EEF 31: Failure of internal EEPROM (continuation >>)
PH 32: Phase loss (continuation >>)
rS 33: Stator resistance measurement failure (continuation >>)
trxx 40-99: User trips (continuation >>)
F.bus 180: Field bus disconnection whilst in use (continuation >>)
C.Err 182: Quickey memory corrupt (continuation >>)
C.dat 183: Quickey with no data (continuation >>)
C.Acc 185: Quickey write fail (continuation >>)
C.rtg 186: Quickey voltage rating change (continuation >>)
O.Ld2 188: +28V serial communications power supply overload (continuation >>)
O.cL 189: Current loop input overload (continuation >>)

Motor runs unstable: Motor or motor connections changed (continuation >>)

Braking and Undervoltage Trip Levels

    Braking Levels:
 200V Units: Trip at 390VDC
 400V Units: Trip at 780VDC
 These are the DC voltage levels at which the Drive will trip if braking causes the DC link voltage to exceed these thresholds. Proper braking resistor sizing and configuration are crucial to prevent these trips.

    UU - Undervoltage Trip Levels:
 200V Units: Trip at 180VDC
 400V Units: Trip at 400VDC
 These represent the minimum DC link voltages below which the Drive will trip to protect itself from operating with insufficient voltage, which can lead to unstable operation and potential damage.

    Reset Levels from UU - Undervoltage Trip:
 200V Units: Reset at 235VDC
 400V Units: Reset at 460VDC
 These are the voltages at which the Drive will reset itself from an undervoltage condition, indicating the minimum required DC voltage for stable operation after a trip.

Alarm Warnings

The Commander SE Drive provides several alarm warnings to alert users before a potential trip condition occurs. If no corrective action is taken, the Drive will eventually trip to protect itself.

    OVL - I x t Overload:
 Condition: Motor current exceeds the programmed rated motor current.
 Cause: Overload on the motor due to excessive mechanical load or other conditions leading to higher current draw than specified.
 Solution: Reduce the motor current by decreasing the load or adjusting the Drive settings to accommodate the load profile.

    hot - Over Temperature:
 Condition: Heatsink or IGBT junction temperature is too high.
 Cause: The Drive is operating outside the specified ambient temperature or the motor current rating curves. This can occur due to poor ventilation, high ambient temperatures, or excessive motor load.
 Solution: Reduce the ambient temperature around the Drive or decrease the motor load to bring the Drive back within its operational limits.

    br.rS - Braking Resistor Overload:
 Condition: Braking resistor thermal model exceeded.
 Cause: The braking resistor is overheating, possibly due to incorrect sizing or excessive braking energy dissipation.
 Solution: Consult the Commander SE Advanced User Guide for proper braking resistor sizing and ensure the braking resistor is adequate for the application. (This warning does not apply to Size 1 units.)

HF - Hardware Fault Trip Codes

HF trips are indicative of internal hardware faults within the Drive. These faults can be due to issues such as component failures, PCB faults, or internal circuitry malfunctions.

    How to Address HF Trips:
 Power down the Drive and then re-apply power. This may reset the fault condition if it is a transient issue.
 If the fault persists, the issue may require professional servicing or replacement of the Drive.

    Impact of HF Trips:
 The Drive Healthy relay will open to indicate a hardware fault.
 Serial communications with the Drive will not function during an HF trip, preventing remote diagnostics or control via communication interfaces.

Diagnostic Recommendations:

    Monitoring Voltage Levels: Regularly monitor DC link voltage levels to ensure they remain within the operational thresholds for both braking and undervoltage conditions.
    Alarm Warnings: Respond promptly to alarm warnings to prevent trips and potential damage. Adjust load or environmental conditions as necessary.
    Hardware Faults: If an HF trip occurs and persists after power cycling, consult the Commander SE Advanced User Guide or contact a Drive Center for further assistance.