What it means
The infeed reports that the asymmetry of the voltages in the line phase is too high; the manual names the failure of a line phase as the most probable cause. The message is only generated when asymmetry monitoring is activated — monitoring is on when bit 1 of parameter p3640 is set to 1 (p3640.1 = 1). Depending on how the drive is configured, the same condition can also be output as a fault (F) or as a message without any reaction (N) instead of this alarm.
Why it appears
- The asymmetry of the voltages in the line phase is too high.
- The most probable cause is the failure of a line phase.
What to check
- Check the line supply, the terminals and the fuses.
- Check the setting values for the phase asymmetry (p3647[0, 1]).
Parameters the manual names
- p3640 (negative phase-sequence system controller configuration): bit 1 switches the supply voltage asymmetry monitoring on and off — this message is only issued when p3640.1 = 1.
- p3647 (negative phase-sequence system controller phase asymmetry): holds the setting values for the permissible phase asymmetry, indices [0] and [1]; check these settings when the message appears.
Acknowledging and restarting
As an alarm, A06208 requires no acknowledgement. If the drive is configured to output the same condition as a fault instead, that fault must be acknowledged before the drive can be restarted.
The same on every family
Every manual that describes A06208 gives it the same reaction, acknowledgement and message class.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| S120, S150 | NONE | NONE | Infeed faulted (13) | Power Module | SINAMICS S120, S150 List Manual · p. 2760 |
The drives this code lives on
A06208 is described for S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does A06208 mean in SINAMICS?
It reports that the asymmetry of the voltages in the line phase at the infeed is too high, with failure of a line phase named as the most probable cause. The message is only output when asymmetry monitoring is activated (p3640.1 = 1).
How do I fix alarm A06208?
Check the line supply, the terminals and the fuses, then check the phase-asymmetry setting values in p3647[0, 1].
Which parameter activates the supply voltage asymmetry monitoring?
Bit 1 of p3640: the monitoring — and therefore this message — is only active when p3640.1 = 1.
Does A06208 have to be acknowledged?
Not as an alarm — no acknowledgement action is required. If the same condition is configured as a fault instead, that fault must be acknowledged before the drive can restart.
Codes next to this one
Source
Written from Siemens' own List Manuals and operating instructions; every number, designation and parameter on this page is checked against them before publication.
All SINAMICS codes: fault and alarm codes · the A06xxx group · SINAMICS manuals · Siemens manuals