Siemens CU230P-2 DP - F30037 Power unit: Rectifier overtemperature; A30042 Power unit: Fan operating time reached or exceeded; A30046 (F) Power unit: Undervoltage, alarm; A30048 Power unit: External fan faulty

List of Faults and Alarms
Faults and Alarms
3-643
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SINAMICS G120 Control Units CU230P-2 Parameter Manual (LH9), 11/2009
F30037 Power unit: Rectifier overtemperature
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: The temperature in the rectifier of the power unit has exceeded the permissible temperature limit.
- insufficient cooling, fan failure.
- overload.
- ambient temperature too high.
- line supply phase failure.
Fault value (r0949, interpret decimal):
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.
- check the line supply phases.
Notice:
This fault can only be acknowledged after this alarm threshold for alarm A05004 has been undershot.
A30042 Power unit: Fan operating time reached or exceeded
Reaction: NONE
Acknowledge: NONE
Cause: The maximum operating time of the fan in the power unit is set in p0252.
This message indicates the following:
Fault value (r0949, interpret decimal):
0: The maximum fan operating time is 500 hours.
1: The maximum fan operating time has been exceeded.
Remedy: Replace the fan in the power unit and reset the operating hours counter to 0 (p0251 = 0).
A30046 (F) Power unit: Undervoltage, alarm
Reaction: NONE
Acknowledge: NONE
Cause: Before the last restart, a problem occurred at the power unit power supply.
- the voltage monitor in the internal FPGA of the PSA signals an undervoltage fault on the module.
Fault value (r0949):
Register value of the voltage fault register.
Remedy: - check the 24 V DC voltage supply to power unit.
- carry out a POWER ON (power off/on) for the component.
- replace the module if necessary.
A30048 Power unit: External fan faulty
Reaction: NONE
Acknowledge: NONE
Cause: The feedback signal from the external fan indicates a fault.
- fan faulty, blocked.
- feedback signal inaccurate.
Remedy: - check the external fan and replace if necessary.
- if you are using an external fan with feedback, check its wiring (X12.2 or X13.2).
Note:
If you are using an external fan without feedback, check that the feedback terminal wiring on the power unit is con-
nected to ground and make this connection if necessary (X12.1/2 or X13.1/2).
A30049 Power unit: Internal fan faulty
Reaction: NONE
Acknowledge: NONE
Cause: The internal fan has failed.
Remedy: Check the internal fan and replace if necessary.