Micromaster 420

Siemens Micromaster 420 Faults and Alarms

A blog we posted earlier this week about the Micromaster 420 troubleshooting referenced the Faults and Alarms list for the Micromaster series, so we decided that it would make sense to make the list of Micromaster 420 Faults and Alarms directly available. This is from the corresponding manual for the Micromaster 420 series, but it is buried within the manual which most people most likely don’t even have. Hopefully this helps with your troubleshooting.

View our 420 Micromaster Drives in stock. For more information or to request a quote, please call 800-691-8511 or email sales@mroelectric.com. We also provide pre-priced Micromaster 420 Repairs.

MICROMASTER 420 fault messages
In the event of a failure, the inverter switches off and a fault code appears on the
display.
NOTE
To reset the fault code, one of three methods listed below can be used:
1. Cycle the power to the drive.
2. Press the   button on the BOP or AOP.
3. Via Digital Input 3 (default setting)

Fault Possible  Causes Diagnose & Remedy Reaction
F0001
Overcurrent
•    Motor power does not correspond
to the inverter power
•    Motor lead short circuit
•    Earth fault
Check the following:
1.     Motor power (P0307) must correspond to inverter power (P0206)
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.     Value of stator resistance (P0350) must be correct
6.     Motor must not be obstructed or overloaded
•    Increase the ramp time
•    Reduce the boost level
OFF2
F0002
Overvoltage
•      DC-link voltage (r0026) exceeds
trip level (P2172)
•      Overvoltage can be caused
either by too high main supply
voltage or if motor is in regenerative mode
•    Regenerative mode can be cause
by fast ramp downs or if the
motor is driven from an active load
Check the following:
1.     Supply voltage (P0210) must lie within limits indicated on rating plate
2.     DC-link voltage controller must be enabled
(P1240) and parameterized properly
3.     Ramp-down time (P1121) must match inertia of load
OFF2
F0003
Undervoltage
•      Main supply failed
•    Shock load outside specified
limits
Check the following:
1.   Supply voltage (P0210) must lie within limits indicated on rating plate
2.   Supply must not be susceptible to temporary failures or voltage reductions
OFF2
F0004
Inverter Over- temperature
•    Ambient temperature outside of
limits,
•    Fan failure
Check the following:
1.     Fan must turn when inverter is running
2.     Pulse frequency must be set to default value
3.     Air inlet and outlet points are not obstructed Ambient temperature could be higher than specified for the inverter
OFF2
F0005
Inverter I2t
•      Inverter overloaded
•    Duty cycle too demanding
•    Motor power (P0307) exceeds
inverter power capability (P0206)
Check the following:
1.     Load duty cycle must lie within specified limits
2.     Motor power (P0307) must match inverter power (P0206)
OFF2
F0011
Motor Over- temperature I2t
•      Motor overloaded
•      Motor data incorrect
•      Long time period operating at
low speeds
1.     Check motor data
2.     Check loading on motor
3.     Boost settings too high
(P1310,P1311, P1312)
4.     Check parameter for motor  thermal time constant
5.     Check parameter for motor I2t warning level
OFF1
F0041
Stator resistance measurement failure
Stator resistance measurement failure 1.   Check if the motor is connected to the inverter
2.   Check that the motor data has
been entered correctly
OFF2
F0051
Parameter
EEPROM Fault
Reading or writing of the non-volatile parameter storage has failed 1.   Factory reset and new parameterization
2.   Change inverter
OFF2
F0052
Powerstack
Fault
Reading of the powerstack information has failed or the data is
invalid
Change inverter OFF2
F0060
Asic  Timeout
Internal communications failure 1.   Acknowledge fault
2.   Change inverter if repeated
OFF2
F0070
Communicatio ns board setpoint error
No setpoint received from
communications board during telegram off time
1.   Check connections to the
communications board
2.   Check the master
OFF2
F0071
No Data for USS (RS232 link) during Telegramm  Off Time
No response during telegram off time
via USS (BOP link)
1.   Check connections to the
communications board
2.   Check the master
OFF2
F0072
No Data from USS (RS485 link) during Telegram  Off Time
No response during telegram off time
via USS (COM link)
1.   Check connections to the
communications board
2.   Check the master
OFF2
F0080
Analogue input  – lost input  signal
•     Broken wire
•   Signal out of limits
Check connection to analogue input OFF2
F0085
External  Fault
External fault is triggered via terminal
inputs
Disable terminal input for fault trigger OFF2
F0101
Stack
Overflow
Software error or processor failure 1.   Run self test routines
2.   Change inverter
OFF2
F0221
PI Feedback below  mini- mum value
PID Feedback below minimum value
P2268
1.   Change value of P2268
2.   Adjust feedback gain
OFF2
F0222
PI Feedback above maximum
value
PID Feedback above maximum value
P2267
1.   Change value of P2267
2.   Adjust feedback gain
OFF2
F0450
(Service mode only)
BIST Tests
Failure
Fault value
1    Some of the power section tests have failed
2    Some of the control board tests have failed
4    Some of the functional tests
have failed
8    Some of the IO module tests have failed
16  The Internal RAM has failed its check on power-up
1.   Inverter may run but certain
actions will not function correctly
2.   Replace inverter
OFF2

 MICROMASTER 420 alarm messages

Fault Possible Causes Diagnose  & Remedy Reaction
A0501
Current  Limit
•     Motor power does not
correspond to the inverter power
•     Motor leads are too short
•   Earth faults
1.     Check whether the motor power
corresponds to the inverter power
2.     Check that the cable length limits have not been exceeded
3.     Check motor cable and motor for short- circuits and earth faults
4.     Check whether the motor parameters
correspond with the motor being used
5.     Check the stator resistance
6.     Increase the ramp-up-time
7.   Reduce the boost
8.   Check whether the motor is obstructed or overloaded
A0502
Overvoltage limit
•   Mains supply too high
•   Load regenerative
•   Ramp-down time too short
1.     Check that mains supply voltage is within allowable range
2.     Increase ramp down times
Note:
Vdc-max controller is active, ramp-down times will be automatically increased
A0503
Undervoltage
Limit
•   Mains supply too low
•   Short mains interruption
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)
1.     Check if ambient temperature is within
specified limits
2.     Check load conditions and duty cycle
3.   Check if fan is turning when drive is running
A0505
Inverter  I2t
Warning level is exceeded; current
will be reduced if parameterized
(P0610 = 1)
Check if duty cycle is within specified limits
A0506
Inverter  Duty
Cycle
Heatsink temperature and thermal junction model are outside of
allowable range
Check if duty cycle are within specified limits
A0511
Motor  Over- temperature I2t
Motor overloaded Check the following:
1.     P0611 (motor i2t time constant) should be set to appropriate value
2.     P0614 (Motor i2t overload warning level)
should be set to suitable level
3.     Are long periods of operation at low speed occuring
4.     Check that boost settings are not too high
A0541
Motor  Data Identification Active
Motor data identification (P1910)
selected or running
Wait until motor identification is finished
A0600
RTOS Overrun
Warning
Software error
A0700
CB warning 1
CB (communication board) specific See CB user manual
A0701
CB warning 2
CB (communication board) specific See CB user manual
A0702
CB warning 3
CB (communication board) specific See CB user manual
A0703
CB warning 4
CB (communication board) specific See CB user manual
A0704
CB warning 5
CB (communication board) specific See CB user manual
A0705
CB warning 6
CB (communication board) specific See CB user manual
A0706
CB warning 7
CB (communication board) specific See CB user manual
A0707
CB warning 8
CB (communication board) specific See CB user manual
A0708
CB warning 9
CB (communication board) specific See CB user manual
A0709
CB warning 10
CB (communication board) specific See CB user manual
A0710
CB communi- cation  error
Communication with CB (communication board) is lost Check CB hardware
A0711
CB configu- ration  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) lies within range?
2.     Load must 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)
1. Check parameter inverter input voltage
2. Check ramp-down times
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
Analogue input parameters should not be set to
the same value as each other
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
Analogue Output parameters should not be set to the same value as each other
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
Low output voltage eg when 0 boost applied at 0 Hz
1.   Check that load is applied to the inverter
2.   Check motor parameters correspond to motor attached
3.   As a result, some functions may not work correctly, because there is no normal load condition
A0923
Both JOG Left and JOG Right are requested
Both JOG right and JOG left
(P1055/P1056) have been requested. This freezes the RFG output frequency at its current value. JOG right and JOG left signals active together
Make sure that JOG right and JOG left signals are not applied simultaneously

 

7 thoughts on “Siemens Micromaster 420 Faults and Alarms

  1. I need help to resolve our MM240 inventor problem .inventor showing alarm A0922 so how to remove the alarm .

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