Infeed: Line Supply Undervoltage; Infeed: Failure Of One Or Several Line Phases - Siemens Sinamics S120 Diagnostic Manual

SINAMICS alarms
206105 <location>Infeed: Line supply undervoltage
Message value: %1
Drive object: AFE_SINUMERIK_828, BIC_SINUMERIK_828, SIC_COMBI, SIC_SINUMERIK_828
Reaction: NONE
Acknowledge: NONE
Cause: The filtered (steady-state) value of line supply voltage is lower than the alarm threshold (p0282).
Alarm condition: Vrms < p0282 * p0210
Alarm value (r2124, floating point):
Actual steady-state line supply voltage.
See also: p0282 (Line supply undervoltage, alarm threshold)
Remedy: - check the line supply.
- check the line supply voltage (p0210).
- check the alarm threshold (p0282).
206200 <location>Infeed: Failure of one or several line phases
Message value: -
Drive object: AFE_SINUMERIK_828, SIC_COMBI, SIC_SINUMERIK_828
Reaction: OFF2 (OFF1)
Acknowledge: IMMEDIATELY (POWER ON)
Cause: Failure overvoltage in one or several line supply phases.
The fault can be output in two operating states:
1. During the power-on phase of the infeed unit.
The measured line supply angle deviates from the regular characteristic for a 3-phase system - the PLL cannot be
synchronized.
The fault occurs immediately after power-up if, when operating with a VSM, the phase assignment L1, L2, L3 at the
VSM differs from the phase assignment at the power unit.
2. While the infeed is operational.
After a voltage dip has been detected or an overvoltage (note A06205) in one or several line phases a fault occurred
within 100 ms (also refer to other relevant messages). Generally, before fault message F06200 is output, Alarm
A06205 occurs at least once, whose warning value can provide information regarding the cause of the line supply fault.
Probable causes of the fault:
- voltage dip on the line side or phase failure or overvoltage lasting longer than 10 ms.
- overload condition on the load side with peak current.
- line reactor missing.
Remedy: - check the line supply and fuses.
- check the connection and size (rating) of the line reactor.
- check and correct the phase assignment at the VSM (X521 or X522) and at the power unit.
- check the load.
- if failed in operation, carefully note the previous alarm messages A6205 with alarm values.
See also: p3463 (Infeed, line angle change, phase failure detection)
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Diagnostics Manual, 07/2010, 6FC5398-8BP40-0BA0
Alarms