Siemens MICROMASTER 430 Operating Instructions Manual page 88

6 Troubleshooting
Alarm Possible Causes
Vdc max controller has been de-
A0910
activated, since controller is not
Vdc-max
capable of keeping DC-link voltage
controller de-
(r0026) within 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 DC-link voltage
controller
(r0026) within limits (P2172).
active
Vdc min controller will be activated if
A0912
DC-link voltage (r0026) falls below
Vdc-min
minimum level (P2172).
controller
The kinetic energy of the motor
active
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
ADC
produce illogical results.
parameters
Index 0: Parameter settings for
not set
properly.
Index 1: Parameter settings for input
Index 2: Parameter settings for input
DAC parameters should not be set to
A0921
identical values, since this would
DAC
produce illogical results.
parameters
Index 0: Parameter settings for
not set
properly.
Index 1: Parameter settings for input
Index 2: Parameter settings for
No Load is applied to the
A0922
inverter.
No load
As a result, some functions may
applied to
not work as under normal load
inverter
conditions.
88
output identical
identical
do not correspond to ADC
type
output identical
identical
output do not correspond to
DAC type
Diagnose & Remedy
Check the following:
1. Input voltage (P0210) must lie within range.
2. Load must be match.
MICROMASTER 430
Issue 05/02
Operating Instructions
6SE6400-5AE00-0BP0