Fault Possible Causes Diagnose & Remedy
F0072
Inverter
communication error
The inverter in LOC control mode has lost
communication with the operator panel for a
minimum of two seconds.
If the communication loss happens in REM
control mode, the inverter will not output
F0072 fault code.
● Check the physical connection between the
inverter and operator panel
● If the fault remains, contact your local distributor
F0080
Analogue input - lost
input signal
● Broken wire
● Signal out of limits
Check connection to analogue input
F0085
External Fault
External fault is triggered via terminal inputs Disable terminal input for fault trigger
F0101
Stack overflow
Software error or processor failure Restart the inverter
F0221
PI feedback below
minimum value
PI feedback below 0 % ● Adjust feedback gain
● Adjust ACD parameter setting
F0222
PI Feedback above
maximum value
PI feedback above 200% Adjust feedback gain
F0422
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.
Apply the load
F0450
BIST tests
unsuccessful
● Self-test routine for power module
components unsuccessful
● Several function tests were unsuccessful
● Failure of the internal RAM at the switch-
on test
● The inverter is functional, but several functions
are not correctly executed.
● If the fault remains, contact your local distributor
F0999
Inverter initialization
unsuccessful
● Poor wiring
● Internal communication between inverter
operator panel and the body unit not yet
established
Power off the inverter, then check wiring. Power on
the inverter again after troubleshooting.
Troubleshooting
SINAMICS V10
Operating Instructions, 08/2011, A5E03453178 (this is not an order number) 111
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