Siemens SED2 Commissioning Manual page 62

Error Cause
A0506 Motor overloaded
VSD duty cycle
A0511 See F0011
Motor over-
2
temperature I t
A0520 Inadmissible environmental conditions
(temperature, elevation above sea level)
VSD rectifier
Overload
overtemperature
VSD's cooling fan defective
A0523 See F0023
VSD output fault
A0541 Indicates that automatic motor data identification
will be made with the next ON command. This
Motor data
function was selected with the settings made in
identification
parameter P1910
enabled
A0600 Real Time Operating System detected loss of data
or time had elapsed. This can occur when the
RTOS data loss
CPU is overloaded due to defective components
or overloaded functions
A0910 DC link controller is not capable of maintaining the
DC link voltage (r0026) within the predefined limits
Vdc controller
and, for this reason, deactivates itself for self-
automatically
protection purposes
disabled
When the DC link voltage (r0026) returns by itself,
and with no error, to an admissible level, the DC
link controller enables itself again (see A0911)
A0911 DC link controller was again activated  the ramp-
down times are automatically increased again to
Vdc controller
maintain the DC link voltage (r0026) within the
enabled again
required limits
A0920 ADC parameter settings lead to inadmissible
values
ADC parameters
not correctly set
A0921 DAC parameter settings lead to inadmissible
values
DAC parameters
not correctly set
62 / 100
Siemens
Building Technologies
Commissioning Guide
9 Display messages
Diagnostics and troubleshooting
Check and calculate the applied load under full load
conditions using the values of r0025, r0027, P0308 and
P0309. Does the current power accord with the power
indicated on the motor's rating plate? If not, motor and
VSD are mechanically overloaded
Environmental conditions must lie within the specified
limits (refer to Data Sheet on VSD, CM1N5192)
Check and calculate the applied load under full load
conditions using the values of r0025, r0027, P0308 and
P0309. Does the current power accord with the power
indicated on the motor's and VSD's rating plate? If not,
motor and VSD are mechanically overloaded
The cooling fan of the VSD must rotate when the VSD is
in operation
Start the VSD according to the instructions given in
section 6.6
− Check the rigidity and proper fitting of the I/O board and
of the BOP. Are the components correctly plugged in
and connected?
− First, replace the I/O board and then the BOP to find
the faulty component
− Has the internal USS baud rate of the VSD been
increased? If yes, check the function at a lower USS
baud rate
− A reset to the default values cancels all undesired
parameter settings and retrieves the default settings.
The VSD must be recommissioned
− Check the input voltage
− Check the ramp times based on the settings
recommended in subsection 7.1.2
− Check and calculate the applied load under full load
conditions using the values of r0025, r0027, P0308 and
P0309 (P motor = r0027 * r0025 * √3 * cosφ * η).
Does the current power accord with the power
indicated on the motor's rating plate? If not, the motor
is mechanically overloaded. If the mechanical overload
is small, the overload factor (P0640) can be increased
to suppress this warning message
− If, during standstill, the connected motor is driven by
some other force, the "Flying start" function (P1200)
must be activated, thus preventing the resulting
regenerative energy from overloading the DC link when
the VSD is started. Readjustment of search current and
search rate might become necessary
See A0910
Check the parameter settings of the analog inputs
(P0756 - P0762)
Check the parameter settings of the analog outputs
(P0770 - P0781)
CM1G5192en
29.07.2010