Infeed: Precharging Monitoring Time Expired; Infeed: Power Unit Ep 24 V Missing In Operation - Siemens Sinamics S120 Diagnostic Manual

SINAMICS alarms
206000 <location>Infeed: Precharging monitoring time expired
Message value: -
Drive object: AFE_SINUMERIK_828, BIC_SINUMERIK_828, SIC_COMBI, SIC_SINUMERIK_828
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 there 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 circuit is possibly defective (only for chassis units).
See also: p0210 (Drive unit line supply voltage), p0857 (Power unit monitoring time)
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 power unit messages/signals (e.g. F30027).
- the following applies to booksize units: Wait (approx. 8 min.) until the pre-charging resistors have cooled down. For
this purpose, preferably disconnect the infeed unit from the line supply.
Re 5):
- carefully observe the permissible pre-charging frequency (refer to the appropriate Equipment Manual).
Re 6):
- check the total capacitance of the DC link and reduce in accordance with the maximum permissible DC-link capaci-
tance if necessary (refer to the appropriate Equipment Manual)
Re 7):
- interconnect the ready-for-operation signal from the infeed unit (r0863.0) in the enable logic of the drives connected
to this DC link
Re 8):
- check the connections of the external line contactor. The line contactor must be open during DC-link fast discharge.
Re 9):
- check the DC link for ground faults or short circuits.
206010 <location>Infeed: Power unit EP 24 V missing in operation
Message value: -
Drive object: AFE_SINUMERIK_828, BIC_SINUMERIK_828, SIC_COMBI, SIC_SINUMERIK_828
Reaction: OFF2 (OFF1)
Acknowledge: IMMEDIATELY (POWER ON)
Cause: In operation, withdraw the pulse enable at terminal EP at the Line Module (X21.3, X21.4).
Remedy: - do not open the Line Side Switch in operation - only when the pulses are inhibited.
- check the wiring of the DP input (X21.3, X21.4) at the Line Module to exclude any poor contacts.
620
Diagnostics Manual, 07/2010, 6FC5398-8BP40-0BA0
Alarms