Siemens SINAMICS G120 - A30042 Power unit: Fan operating time reached or exceeded; A30049 Power unit: Internal fan faulty; F30052 EEPROM data error; A30054 (F) Power unit: Undervoltage when opening the brake

Faults and Alarms
List of Faults and Alarms
3-718
© Siemens AG 2011 All Rights Reserved
SINAMICS G120 / Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
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, decimal interpretation):
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).
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.
F30052 EEPROM data error
Reaction: NONE
Acknowledge: POWER ON
Cause: EEPROM data error of the power unit module.
Fault value (r0949, interpret hexadecimal):
0: The EEPROM data read in from the power unit module is inconsistent.
1: The EEPROM data is not compatible with the CU firmware.
Remedy: For fault value = 0:
Replace power unit module.
For fault value = 1:
Replace power unit module.
A30054 (F) Power unit: Undervoltage when opening the brake
Reaction: NONE
Acknowledge: NONE
Cause: When the brake is being opened, it is detected that the power supply voltage is less than 24 V - 10% = 21.6V.
Alarm value (r2124, interpret decimal):
Supply voltage fault [0.1 V].
Example:
Alarm value = 212 --> voltage = 21.2 V
Remedy: Check the 24V power supply for stability and value.
F30055 Power unit: Braking chopper overcurrent
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: An overcurrent condition has occurred in the braking chopper.
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.
F30059 Power unit: Internal fan faulty
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: The internal power unit fan has failed and is possibly defective.
Remedy: Check the internal fan and replace if necessary.