Siemens SINAMICS S210 Operating Instructions Manual page 506

Faults and alarms
15.2 List of faults and alarms
Remedy: - check whether the braking resistor has a short circuit.
- for an external braking resistor, check whether the resistor may have been dimensioned too small.
Note:
The braking chopper is only enabled again at pulse enable after the fault has been acknowledged.
F30068 Power unit: undertemperature inverter heat sink
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: The actual inverter heat sink temperature is below the permissible minimum value.
Possible causes:
- the power unit is being operated at an ambient temperature that lies below the permissible range.
- the temperature sensor evaluation is defective.
Fault value (r0949, interpret decimal):
Inverter heat sink temperature [0.1 °C].
Remedy: - ensure that higher ambient temperatures prevail.
- replace the power unit.
F30075 Configuration of the power unit unsuccessful
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: A communication error has occurred while configuring the power unit using the Control Unit. The cause is not clear.
Fault value (r0949, interpret decimal):
0:
The output filter initialization was unsuccessful.
1:
Activation/deactivation of the regenerative feedback functionality was unsuccessful.
2:
Activation/deactivation of the chopper function was unsuccessful.
Remedy: - acknowledge the fault and continue operation.
- if the fault reoccurs, carry out a POWER ON (switch-off/switch-on).
- if required, replace the power unit.
A30076 Power unit: thermal overload internal braking resistor alarm
Reaction: NONE
Acknowledge: NONE
Cause: The energy absorbed by the internal braking resistor has exceeded the alarm threshold of 80 %. If the power unit is still
operated in the generator mode, then this can reach the shutdown threshold. To avoid overheating of the braking resistor,
use of the braking resistor is inhibited and alarm A30077 is output.
Alarm value (r2124, interpret decimal):
Energy absorbed by the braking resistor [Ws].
Remedy: Reduce the power when generating.
Note:
For a DC link coupling, the generating power of all of the coupled power units must be taken into consideration.
A30077 Power unit: thermal overload internal braking resistor
Reaction: NONE
Acknowledge: NONE
Cause: The internal braking resistor is thermally overloaded. This is the reason that its use was inhibited.
Alarm value (r2124, interpret decimal):
Energy absorbed by the braking resistor [Ws].
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SINAMICS S210 servo drive system
Operating Instructions, 01/2019, A5E41702836B AC