Cause : Voltage dip in at least one line supply phase comes when voltage dip or overvoltage in one or several line supply phases has been detected in operation. The pulses are then inhibited for a time of at least 8 ms. The operating signal of the infeed unit in r0863.0 remains and the pulse inhibit due to the phase failure is displayed in r3405.2.

Alarm value (r2124, bit-wise coded cause of the alarm):

Bit 0: Line angle deviation (limit value p3463) due to a line supply fault
Bit 2: Active current deviation
Bit 3: Line frequency deviation (limit values: 115 % * p0284, 85 % * p0285)
Bit 4: Line overvoltage (limit value 120 % * p0281 * p0210)
Bit 5: Line undervoltage (limit value 20 % * p0210)
Bit 7: Peak current fault
Bit 8: Smart Mode without VSM (p3400.5 = 0): Line angle deviation
Bit 9: Smart Mode: DC link voltage dip
Bit 10: Smart Mode: Line currents not symmetrical
Bit 11: Smart Mode: Line supply voltage detection fault
Bit 14: Recharging current fault

Generally, the following applies when an alarm message is output:

- check the line supply and fuses.
- check the line supply quality and system fault level.
- check the load.

Dependent on the alarm value in r2124, the following applies:

Bit 0 = 1: Line fault occurred or poor/incorrect controller setting. For poor line quality or frequent line supply changeover operations, when required, limit value p3463 can be increased until the alarm value no longer occurs.
Bit 2 = 1: Line fault occurred or poor/incorrect controller setting. - check the controller setting and load.
Bit 3 = 1: Line fault occurred. For poor line quality or frequent line changeover operations, when required, limit values p0284 and p0285 can be increased until the alarm value no longer occurs.
Bit 4 = 1: Line interrupted or line overvoltage has occurred.
Bit 5 = 1: Line interrupted or line undervoltage has occurred.
Bit 7 = 1: Peak current trip due to line fault or overload. Check the load.
Bit 8 = 1: Line fault occurred.
Bit 9 = 1: Line undervoltage or overload. Check the load.
Bit 10 = 1: Line supply interrupted in at least one line phase. Check the fuses.
Bit 11 = 1: Fault in at least one line phase. Check the fuses.
Bit 14 = 1: Supply/infeed overload or fault in at least one line phase. Check the load. Check the line supply and fuses.

See also: r3405, p3463 (Infeed line angle change phase failure detection)