Siemens SINAMICS G120XA - Power Unit: Overcurrent; Power Unit: DC Link Voltage Overvoltage

F30001 Power unit: Overcurrent
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: The power unit has detected an overcurrent condition.
- closed-loop control is incorrectly parameterized.
- motor has a short-circuit or fault to ground (frame).
- U/f operation: Up ramp set too low.
- U/f operation: rated current of motor much greater than that of power unit.
- High discharge and post-charging current for line supply voltage interruptions.
- High post-charging currents for overload when motoring and DC link voltage dip.
- short-circuit currents at switch-on due to the missing line reactor.
- power cables are not correctly connected.
- power cables exceed the maximum permissible length.
- power unit defective.
- line phase interrupted.
Fault value (r0949, interpret bitwise binary):
Bit 0: Phase U.
Bit 1: Phase V.
Bit 2: Phase W.
Bit 3: Overcurrent in the DC link.
Note:
Fault value = 0 means that the phase with overcurrent is not recognized.
Remedy: - check the motor data - if required, carry out commissioning.
- check the motor circuit configuration (star/delta).
- U/f operation: Increase up ramp.
- U/f operation: Check assignment of rated currents of motor and power unit.
- check the line supply quality.
- reduce motor load.
- correct connection of line reactor.
- check the power cable connections.
- check the power cables for short-circuit or ground fault.
- check the length of the power cables.
- replace power unit.
- check the line supply phases.
F30002 Power unit: DC link voltage overvoltage
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: The power unit has detected an overvoltage condition in the DC link.
- motor regenerates too much energy.
- line supply voltage too high.
- line phase interrupted.
- DC link voltage control switched off.
- dynamic response of DC link voltage controller excessive or insufficient.
Fault value (r0949, interpret decimal):
DC link voltage at the time of trip [0.1 V].
Warnings, faults and system messages
9.6 List of fault codes and alarm codes
SINAMICS G120XA converter
808 Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB