Fault and warning codes
SINAMICS V20 Inverter
Operating Instructions, 07/2012, A5E03728167
235
Fault Cause Remedy
F6
Chip temperature rise
exceeds critical levels
• Load at start-up is too high
• Load step is too high
• Ramp-up rate is too fast
Check the following:
• Load or load step too high?
• Increase ramp-up time (P1120).
• Motor power (P0307) must match inverter power
(r0206).
• Use setting P0290 = 0 or 2 for preventing F6.
F11
Motor overtemperature
Motor overloaded Check the following:
• Load or load step too high?
• Motor nominal overtemperatures (P0626 -
P0628) must be correct
• Motor temperature warning level (P0604) must
match
F12
Inverter temperature
signal lost
Wire breakage of inverter temperature
(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
Auto restart after n
Auto restart attempts exceed value of
P1211.
F41
Motor data identification
failure
Motor data identification failed.
• r0949 = 0: Load missing
• 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
inverter?
• 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 correct.
• 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 inverter.
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