Siemens SINAMICS V20 - Page 338

Faults and alarms
9.1 Faults
SINAMICS V20 Converter
336 Operating Instructions, 10/2019, A5E34559884-012
Fault
Cause
Remedy
F12
Converter tem-
perature signal
lost
Wire breakage of converter tem-
perature (heat sink) sensor.
F20
DC ripple too
high
The calculated DC ripple level has
exceeded the safe threshold. This
is commonly caused by loss of one
of the mains input phases.
Check the mains supply wiring.
F35
Maximum num-
ber of auto re-
start attempts
exceeded
Auto restart attempts exceed value
of P1211.
F41
Motor data identi-
fication failure
Motor data identification failed.
• r0949 = 0: No load applied
• r0949 = 1: Current limit level
reached during identification.
• r0949 = 2: Identified stator
resistance less than 0.1% or
greater than 100%.
• r0949 = 30: Current controller
at voltage limit
• r0949 = 40: Inconsistency of
identified dataset, at least one
identification failed
Percentage values based on the
impedance Zb =
Vmot,nom/sqrt(3)/Imot,nom
Check the following:
• r0949 = 0: is the motor connected to the converter?
• r0949 = 1 - 49: are the motor data in P0304 - P0311 correct?
• Check what type of motor wiring is required (star, delta).
F51
Parameter
EEPROM fault
Read or write failure while access
to EEPROM. This can also be
caused by the EEPROM being full,
too many parameters have been
changed.
• Must be power-cycled to cancel this bug as some parameters
may not be read correctly.
• Factory reset and new parameterization, if power-cycle does
not remove fault.
• Change some parameters back to default values if the
EEPROM is full, then power-cycle.
• Change converter.
Note:
• r0949 = 1: EEPROM full
• r0949 = 1000 + block No: reading data block failed
• r0949 = 2000 + block No: reading data block timeout
• r0949 = 3000 + block No: reading data block CRC failed
• r0949 = 4000 + block No: writing data block failed
• r0949 = 5000 + block No: writing data block timeout
• r0949 = 6000 + block No: writing data block verify failed
• r0949 = 7000 + block No: reading data block at wrong time
• r0949 = 8000 + block No: writing data block at wrong time
• r0949 = 9000 + block No: factory reset did not work because
restart or power failure