Siemens SINAMICS G120XA - Power Unit: Internal Overtemperature Alarm; Power Unit: Hardware Current Limiting in Phase U; Power Unit: Hardware Current Limiting in Phase V

Remedy: In general:
- check the line supply voltage at the input terminals.
- check the line supply voltage setting (p0210).
- wait until the precharging resistors have cooled down. For this purpose, preferably disconnect the infeed unit from the line
supply.
For 5):
- carefully observe the permissible precharging frequency (refer to the appropriate Equipment Manual).
For 6):
- check the capacitance of the DC link and, if necessary, reduce it in accordance with the maximum permissible DC link
capacitance (see relevant Equipment Manual).
For 7):
- check the DC link for a ground fault or short circuit.
See also: p0210 (Drive unit line supply voltage)
A30030 Power unit: Internal overtemperature alarm
Reaction: NONE
Acknowledge: NONE
Cause: The temperature inside the drive converter has exceeded the permissible temperature limit.
- insufficient cooling, fan failure.
- overload.
- ambient temperature too high.
Alarm value (r2124, interpret decimal):
Only for internal Siemens troubleshooting.
Remedy: - possibly use an additional fan.
- check whether the ambient temperature is in the permissible range.
Notice:
This fault can only be acknowledged once the permissible temperature limit minus 5 K has been fallen below.
A30031 Power unit: Hardware current limiting in phase U
Reaction: NONE
Acknowledge: NONE
Cause: Hardware current limit for phase U responded. The pulsing in this phase is inhibited for one pulse period.
- closed-loop control is incorrectly parameterized.
- fault in the motor or in the power cables.
- the power cables exceed the maximum permissible length.
- motor load too high
- power unit defective.
Note:
Alarm A30031 is always output if, for a Power Module, the hardware current limiting of phase U, V or W responds.
Remedy: - check the motor data and if required, recalculate the control parameters (p0340 = 3). As an alternative, run a motor data
identification (p1910 = 1, p1960 = 1).
- check the motor circuit configuration (star/delta).
- check the motor load.
- check the power cable connections.
- check the power cables for short-circuit or ground fault.
- check the length of the power cables.
A30032 Power unit: Hardware current limiting in phase V
Reaction: NONE
Acknowledge: NONE
Warnings, faults and system messages
9.6 List of fault codes and alarm codes
SINAMICS G120XA converter
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB 815