Siemens SINAMICS V20 Operating Instructions Manual page 322

Faults and alarms
9.1 Faults
Fault
F20
DC ripple too high
F35
Maximum number of auto
restart attempts exceeded
F41
Motor data identification
failure
322
Cause
The calculated DC ripple level has ex-
ceeded the safe threshold. This is
commonly caused by loss of one of the
mains input phases.
Auto restart attempts exceed value of
P1211.
Motor data identification failed.
r0949 = 0: No load applied
•
r0949 = 1: Current limit level
•
reached during identification.
r0949 = 2: Identified stator re-
•
sistance less than 0.1% or greater
than 100%.
r0949 = 30: Current controller at
•
voltage limit
r0949 = 40: Inconsistency of identi-
•
fied dataset, at least one identifica-
tion failed
Percentage values based on the im-
pedance Zb = Vmot,nom / sqrt(3) /
Imot,nom
Remedy
Check the mains supply wiring.
Check the following:
r0949 = 0: is the motor connected to the invert-
•
er?
r0949 = 1 - 49: are the motor data in P0304 -
•
P0311 correct?
Check what type of motor wiring is required
•
(star, delta).
Operating Instructions, 11/2016, A5E34559884-006
SINAMICS V20 Inverter