Siemens SIMOTICS S-1FL6 Operating Instructions Manual page 270

Diagnostics
12.2 List of faults and alarms
Fault
F30021: Ground fault
Message class: Ground fault /
inter-phase short-circuit de-
tected (7)
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
F30027: Precharging DC link
time monitoring
Message class: Infeed faulted
(13)
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
F30036: Internal overtemper-
ature
Message class: Power elec-
tronics faulted (5)
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
F30050: 24 V supply over-
voltage
Message class: Supply volt-
age fault (undervoltage) (3)
Reaction: OFF2
Acknowledgement: POWER
ON
270
Cause
Power unit has detected a ground fault.
Ground fault in the power cables.
•
Winding fault or ground fault at the
•
motor.
The power unit DC link was not able to
•
be pre-charged within the expected
time.
There is no line supply voltage con-
nected.
The line contactor/line side switch has
•
not been closed.
The line supply voltage is too low.
•
The pre-charging resistors are over-
•
heated as there were too many pre-
charging operations per time unit
The pre-charging resistors are over-
•
heated as the DC link capacitance is
too high.
The pre-charging resistors are over-
•
heated.
The pre-charging resistors are over-
•
heated as the line contactor was closed
during the DC link fast discharge
through the Braking Module.
The DC link has either a ground fault or
•
a short-circuit.
The pre-charging circuit is possibly
•
defective.
The temperature inside the drive converter
has exceeded the permissible temperature
limit.
Insufficient cooling, fan failure.
•
Overload.
•
Surrounding temperature too high.
•
The voltage monitor signals an overvoltage
fault on the module.
Remedy
Check the power cable connections.
•
Check the motor.
•
Check the line supply voltage at the input
terminals.
Check whether the fan is running.
•
Check the fan elements.
•
Check whether the surrounding tempera-
•
ture is in the permissible range.
Notice:
This fault can only be acknowledged once the
permissible temperature limit minus 5 K has
been fallen below.
Check the 24 V power supply.
•
Replace the module if necessary.
•
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2016, A5E37208830-002