6 Troubleshooting
International English
MICROMASTER 440 Operating instructions
74
6SE6400-5CA00-0BP0
Fault
Possible Causes
Diagnose & Remedy
Reac-
tion
A0707
CB warning 8 see
CB manual for
details.
CB (communication board) specific
See CB user manual
--
A0708
CB warning 9 see
CB manual for
details.
CB (communication board) specific
See CB user manual
--
A0709
CB warning 10 see
CB manual for
details.
CB (communication board) specific
See CB user manual
--
A0710
CB
communication
error
Communication with CB (communication
board) is lost
Check CB hardware
--
A0711
CB configuration
error
CB (communication board) reports a
configuration error.
Check CB parameters
--
A0910
Vdc-max
controller de-
activated
Vdc max controller has been de-
activated, since controller is not capable
of keeping DC-link voltage (r0026) within
limits (P2172).
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.
Check the following:
1. Input voltage (P0756) must lie within range.
2. Load must be match.
In certain cases apply braking resistor.
--
A0911
Vdc-max
controller active
Vdc max controller is active; so ramp-
down times will be increased
automatically to keep
DC-link voltage (r0026) within limits
(P2172).
--
A0912
Vdc-min controller
active
Vdc min controller will be activated if DC-
link voltage (r0026) falls below minimum
level (P2172).
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.
--
A0920
ADC parameters
not set properly.
ADC parameters should not be set to
identical values, since this would produce
illogical results.
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
--
A0921
DAC parameters
not set properly.
DAC parameters should not be set to
identical values, since this would produce
illogical results.
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
--
A0922
No load applied to
inverter
No Load is applied to the inverter.
As a result, some functions may not work
as under normal load conditions.
--
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