List of Faults and Alarms
Faults and Alarms
3-635
© Siemens AG 2009 All Rights Reserved
SINAMICS G120 Control Units CU230P-2 Parameter Manual (LH9), 11/2009
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 [1 bit = 100 mV].
Remedy: -increase the ramp-down time (p1121).
- set the rounding times (p1130, p1136). This is particularly recommended in V/f operation to relieve the DC link volt-
age controller with rapid ramp-down times of the ramp-function generator.
- Activate the DC link voltage controller (p1240, p1280).
- adapt the dynamic response of the DC-link voltage controller (p1243, p1247, p1283, p1287).
- Check the line connection voltage (p0210).
- check and correct the phase assignment at the power unit.
- check the line supply phases.
See also: p0210 (Drive unit line supply voltage), p1240 (Vdc controller or Vdc monitoring configuration (vector con-
trol))
F30003 Power unit: DC link voltage, undervoltage
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: The power unit has detected an undervoltage condition in the DC link.
- line supply failure
- line supply voltage below the permissible value.
- line phase interrupted.
Note:
The monitoring threshold for the DC link undervoltage is the minimum of the following values:
- for a calculation, refer to p0210.
Remedy: - check the line supply voltage
- check the line supply phases.
See also: p0210 (Drive unit line supply voltage)
F30004 Power unit: Overtemperature heat sink AC inverter
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: The temperature of the power unit heat sink has exceeded the permissible limit value.
- insufficient cooling, fan failure.
- overload.
- ambient temperature too high.
- pulse frequency too high.
Fault value (r0949):
Temperature [1 bit = 0.01 °C].
Remedy: - check whether the fan is running.
- check the fan elements.
- check whether the ambient temperature is in the permissible range.
- check the motor load.
- reduce the pulse frequency if this is higher than the rated pulse frequency.
Notice:
This fault can only be acknowledged after this alarm threshold for alarm A05000 has been undershot.
See also: p1800 (Pulse frequency setpoint)
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