6 Troubleshooting Issue 04/02
MICROMASTER 410 Operating Instructions
60 6SE6400-5EA00-0BP0
6.4 Alarms
Alarm Possible Causes Diagnose & Remedy Reac-
tion
A0501
Current Limit
Ø Motor power does not
correspond to the inverter power
Ø Motor leads are too long
Ø Earth faults
Check the following:
1. Motor power (P0307) must correspond to
inverter power (r0206).
2. Cable length limits must not be exceeded.
3. Motor cable and motor must have no short-
circuits or earth faults
4. Motor parameters must match the motor in
use
5. Motor must not be obstructed or overloaded
Ø Increase the ramp-up-time.
Ø Reduce the boost.
--
A0502
Overvoltage
limit
Ø Overvoltage limit is reached.
Ø This warning can occur during
ramp down, if the dc-link con-
troller is disabled (P1240 = 0).
If this warning is displayed permanently, check
drive input voltage .
--
A0503
UnderVoltage
Limit
Main supply failed Check main supply voltage (P0210). --
A0504
Inverter Over
Temperature
Warning level of inverter heat-sink
temperature (P0614) is exceeded,
resulting in pulse frequency reduction
and/or output frequency reduction
(depending on parametrization in
(P0610)
Check the following:
1. Ambient temperature must lie within
specified limits
2. Load conditions and duty cycle must be
appropriate
--
A0505
Inverter I
2
t
Warning level exceeded, current will
be reduced if parameterized
(P0610 = 1)
Check that duty cycle lies within specified limits --
A0506
Inverter duty
cycle
Difference between heatsink and
IGBT junction temperature exceeds
warning limits
Check that duty cycle and shock loads lie within
specified limits
--
A0511
Motor Over
Temperature
I
2
t
Ø Motor overloaded.
Ø Load duty cycle too high.
Check the following:
1. P0611 (motor I
2
t time constant) should be
set to appropriate value
2. P0614 (Motor I
2
t overload warning level)
should be set to suitable level
--
A0600
RTOS Overrun
Warning
Software problem Contact Service Department --
A0910
Vdc-max
controller de-
activated
Ø Vdc max controller has been de-
activated
Ø Occurs if main supply voltage is
permanently too high.
Ø Occurs if motor is driven by an
active load, causing motor to go
into regenerative mode.
Ø Occurs at very high load inertias,
when ramping down.
Check the following:
1. Input voltage must lie within range.
2. Load must be matched.
3. 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
Check the inverter input voltage (P0210) --
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