Code 206000: <location>Infeed: Precharg ing monitoring time expired

Message value: Drive object: A_INF, B_INF, S_INF Reaction: OFF2 (OFF1) Acknowledge: IMMEDIATELY Cause: After the line contactor closes the power unit does not signal the READY state within the monitoring time (p0857). The end of the DC link pre-charging was not able to be completed for one of the following reasons: 1) There is no line supply voltage connected. 2) The line contactor/line side switch has not been closed. 3) The line supply voltage is too low. 4) Line supply voltage incorrectly set (p0210). 5) The pre-charging resistors are overheated as t here were too many pre-charging operations per time unit. 6) The pre-charging resistors are overheated as the DC link capacitance is too high. 7) The pre-charging resistors are overheated because when there is no "ready for operation" (r0863.0) of the infeed unit, power is taken from the DC link. 8) The pre-charging resistors are overheated as the line contactor was closed during the DC link fast discharge through the Braking Module. 9) The DC link has either a ground fault or a short-circuit. 10) The pre-charging circ uit is possibly defective (only for chassis units). See also: p0210, p0857 SINAMICS-Alarms Remedy: In general: - check the line supply voltage at the connecting terminals. - check the line supply voltage setting (p0210). - check the monitoring time and, if required, increase (p0857). - where relevant, observe additional pow er unit messages/signals (e.g. F30027). - the following applies to booksize units: Wait (approx. 8 min.) until the pre-charging resistors have cooled down. The infeed unit must be disconne cted from the supply for this purpose. Re 5): - carefully observe the permissibl e pre-charging frequency (refer to the appropriate Equipment Manual). Re 6): - check the total capacitance of the DC link and if required, correspondingly reduce the maximum permissible DC link capacitance (refer to the appropriate Equipment Manual). Re 7): - interconnect the ready for operation signal of the in feed unit (r0863.0) in the enable logic of the drives connected to this DC link. Re 8): - check the connections of the ex ternal line contactor. The line contactor must be open during the DC link fast discharge. Re 9): - check the DC link regarding ground fault or short-circuit.