Siemens SINUMERIK 808D ADVANCED Diagnostic Manual page 542

SINAMICS V70 faults and alarms
7.2 Common faults and alarms
Fault
F7901: Motor overspeed
Reaction: OFF2
Acknowledgement: IMMEDI‐
ATELY
F7995: Pole position identifi‐
cation not successful
Reaction: OFF2
Acknowledgement: IMMEDI‐
ATELY
F30001: Power unit: Overcur‐
rent
Reaction: OFF2
Acknowledgement: IMMEDI‐
ATELY
F30002: DC link voltage,
overvoltage
Reaction: OFF2
Acknowledgement: IMMEDI‐
ATELY
F30003: DC link voltage, un‐
dervoltage
Reaction: OFF2
Acknowledgement: IMMEDI‐
ATELY
F30004: Drive heat sink over‐
temperature
Reaction: OFF2
Acknowledgement: IMMEDI‐
ATELY
542
Cause
The maximum permissible speed has been
exceeded.
The pole position identification routine was
unsuccessful.
The power unit has detected an overcurrent
condition.
● Closed-loop control is incorrectly
parameterized.
● Motor has a short-circuit or fault to
ground (frame).
● Power cables are not correctly
connected.
● Power cables exceed the maximum
permissible length.
● Power unit defective.
● Line phase interrupted.
The power unit has detected overvoltage in
the DC link.
● Motor regenerates too much energy.
● Device connection voltage too high.
● Line phase interrupted.
The power unit has detected an undervolt‐
age condition in the DC link.
● Line supply failure
● Line supply voltage below the
permissible value.
● Line supply infeed failed or interrupted.
● Line phase interrupted.
The temperature of the power unit heat sink
has exceeded the permissible limit value.
● Insufficient cooling, fan failure.
● Overload.
● Ambient temperature too high.
● Pulse frequency too high.
Remedy
Check and correct the maximum speed (p1082).
Contact the Hotline.
● Check the motor data - if required, carry out
commissioning.
● Check the motor circuit configuration (star-
delta)
● Check the power cable connections.
● Check the power cables for short-circuit or
ground fault.
● Check the length of the power cables.
● Replace power unit.
● Check the line supply phases.
● Check the external braking resistor
connection.
● Increase the ramp-down time.
● Activate the DC link voltage controller.
● Use a braking resistor.
● Increase the current limit of the infeed or use
a larger module.
● Check the device supply voltage.
● Check the line supply phases.
● Check the line supply voltage.
● Check the line supply infeed and observe
the fault messages relating to it (if there are
any).
● Check the line supply phases.
● Check the line supply voltage setting.
● Check whether the fan is running.
● Check the fan elements.
● Check whether the ambient temperature is
in the permissible range.
● Check the motor load.
● Reduce the pulse frequency if this is higher
than the rated pulse frequency.
Diagnostics Manual, 06/2015, 6FC5398-6DP10-0BA2
Diagnostics Manual