Siemens MICROMASTER 440 Series Operating Instructions Manual page 75

6 Troubleshooting
Fault Possible Causes
CB (communication board) specific
A0707
CB warning 8 see
CB manual for
details.
CB (communication board) specific
A0708
CB warning 9 see
CB manual for
details.
CB (communication board) specific
A0709
CB warning 10 see
CB manual for
details.
Communication with CB (communication
A0710
board) is lost
CB
communication
error
CB (communication board) reports a
A0711
configuration error.
CB configuration
error
Vdc max controller has been de-
A0910
activated, since controller is not capable
Vdc-max
of keeping DC-link voltage (r0026) within
controller de-
limits (P2172).
activated
Occurs if main supply voltage (P0210) is
permanently too high.
Occurs if motor is driven by an active
load, causing motor to goes into
regenerative mode.
Occurs at very high load inertias, when
ramping down.
Vdc max controller is active; so ramp-
A0911
down times will be increased
Vdc-max
automatically to keep
controller active
DC-link voltage (r0026) within limits
(P2172).
Vdc min controller will be activated if DC-
A0912
link voltage (r0026) falls below minimum
Vdc-min controller
level (P2172).
active
The kinetic energy of the motor is used to
buffer the DC-link voltage, thus causing
deceleration of the drive!
So short mains failures do not necessarily
lead to an undervoltage trip.
ADC parameters should not be set to
A0920
identical values, since this would produce
ADC parameters
illogical results.
not set properly.
Index 0: Parameter settings for output
identical
Index 1: Parameter settings for input
identical
Index 2: Parameter settings for input do
not correspond to ADC type
DAC parameters should not be set to
A0921
identical values, since this would produce
DAC parameters
illogical results.
not set properly.
Index 0: Parameter settings for output
identical
Index 1: Parameter settings for input
identical
Index 2: Parameter settings for output do
not correspond to DAC type
No Load is applied to the inverter.
A0922
As a result, some functions may not work
No load applied to
as under normal load conditions.
inverter
74
Diagnose & Remedy
See CB user manual
See CB user manual
See CB user manual
Check CB hardware
Check CB parameters
Check the following:
1. Input voltage (P0756) must lie within range.
2. Load must be match.
In certain cases apply braking resistor.
MICROMASTER 440
http://nicontrols.com
International English
Operating instructions
6SE6400-5CA00-0BP0
Reac-
tion
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