Siemens Micromaster 420 Operating Instruction page 95

6. TROUBLESHOOTING
Fault Code Description
F0051 Parameter EEPROM
Fault
F0052 Powerstack Fault
F0060 Asic Timeout
F0070 Communications board
setpoint error
F0071 No Data for USS
(RS232 link) during
Telegramm Off Time
F0072 No Data from USS
(RS485 link) during
Telegram Off Time
F0080 Analogue input - lost
input signal
F0085 External Fault
F0101 Stack Overflow
F0221 PI Feedback below
minimum value
F0222 PI Feedback above
maximum value
F0450 BIST Tests Failure
(Service mode
only)
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0
Possible Causes
Reading or writing of the non-
volatile parameter storage has
failed.
Reading of the powerstack
information has failed or the data is
invalid
Software error
No setpoint received from
communications board during
telegram off time
No response during telegram off
time
No response during telegram off
time
Analogue input - lost input signal
External fault is triggered via
terminal inputs
Software error or processor failure
PI Feedback below minimum value
P2268
PI Feedback above maximum
value P2267
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. Vector only
16 - The Internal Ram has failed its
check on power-up
International English
Diagnosis & Remedy
1. Factory reset and new
parameterization.
2. Change inverter.
Change inverter.
1. Acknowledge fault
2. Change inverter if repeated.
1. Check connections to the
communications board.
2. Check the master
1. Check connections to the
communications board.
2. Check the master
1. Check connections to the
communications board.
2. Check the master
Check connection to analogue input
Disable terminal input for fault trigger.
1. Run self test routines.
2. Change inverter
1. Change value of P2268.
2. Adjust feedback gain.
1. Change value of P2268.
2. Adjust feedback gain.
1. Inverter may run but certain
actions will not function correctly.
2. Replace inverter.
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