Siemens CU240B-2 Parameter Manual page 698

Faults and Alarms
List of Faults and Alarms
F07802 Drive: Infeed or power unit not ready
Reaction: OFF2 (NONE)
Acknowledge: IMMEDIATELY
Cause: After an internal power-on command, the infeed or drive does not signal ready.
- monitoring time is too short.
- DC link voltage is not present.
- associated infeed or drive of the signaling component is defective.
- supply voltage incorrectly set.
Remedy: - increase the monitoring time (p0857).
- ensure that there is a DC link voltage. Check the DC link busbar. Enable the infeed.
- replace the associated infeed or drive of the signaling component.
- check the line supply voltage setting (p0210).
See also: p0857 (Power unit monitoring time)
A07805 (N) Drive: Power unit overload I2t
Reaction: NONE
Acknowledge: NONE
Cause: Alarm threshold for I2t overload (p0294) of the power unit exceeded.
The response parameterized in p0290 becomes active.
See also: p0290 (Power unit overload response)
Remedy: - reduce the continuous load.
- adapt the load duty cycle.
- check the assignment of the motor and power unit rated currents.
F07806 Drive: Regenerative power limit exceeded (F3E)
Reaction: OFF2 (IASC/DCBRAKE)
Acknowledge: IMMEDIATELY
Cause: For blocksize power units, types PM250 and PM260, the regenerative rated power r0206[2] was exceeded for more
than 10 s.
See also: r0206 (Rated power unit power), p1531 (Power limit regenerative)
Remedy: - increase the down ramp.
- reduce the driving load.
- use a power unit with a higher regenerative feedback capability.
- for vector control, the regenerative power limit in p1531 can be reduced so that the fault is no longer triggered.
F07807 Drive: Short-circuit detected
Reaction: OFF2 (NONE)
Acknowledge: IMMEDIATELY
Cause: A phase-phase short-circuit was detected at the motor-side output terminals of the converter.
Note:
Also when interchanging the line and motor cables is identified as a motor-side short circuit.
Remedy: - check the motor-side converter connection for a phase-phase short-circuit.
- rule-out interchanged line and motor cables.
F07808 (A) HF damping module: damping not ready
Reaction: OFF2 (NONE, OFF1, OFF3)
Acknowledge: IMMEDIATELY
F07810 Drive: Power unit EEPROM without rated data
Reaction: NONE
Acknowledge: IMMEDIATELY
Cause: No rated data are stored in the power unit EEPROM.
See also: p0205 (Power unit application), r0206 (Rated power unit power), r0207 (Rated power unit current), r0208
(Rated power unit line supply voltage), r0209 (Power unit, maximum current)
Remedy: Replace the power unit or inform Siemens Customer Service.
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SINAMICS G120 / Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
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