Faults and alarms
9.2 Alarms
SINAMICS V20 Converter
Operating Instructions, 10/2019, A5E34559884-012
341
9.2 Alarms
If an alarm is activated the alarm icon shows immediately and then the display shows the
alarm code proceeded by "A".
Note
Note that alarms cannot be acknowledged. They are cleared automatically once the warning
has been rectified.
Disabling converter stop reaction for alarms
You can disable stop reaction for three selected alarms or all alarms:
● Use P2100 to select up to 3 alarms and use P2101 to disable stop reaction for the
selected alarms.
● Use P2113 to disable stop reaction for all alarms.
For more information, see the description of P2100, P2101, and P2113 in Section
"Parameter list (Page 198)".
Alarm code list
Current limit
• Motor power does not correspond to the convert-
er power
• Motor leads are too long
• Earth faults
See F1.
• Small motors (120 W) under FCC and light load
may cause a high current
Use V/f operation for very small motors
Overvoltage
Overvoltage limit is reached. This warning can occur
during ramp down, if the Vdc controller is disabled
(P1240 = 0).
If this warning is displayed permanently, check
converter input voltage.
Undervoltage
limit
• Main supply failed.
• Main supply and consequently DC-link voltage
(r0026) below specified limit.
Check main supply voltage.
Converter
overtempera-
ture
Warning level of converter heat sink temperature,
warning level of chip junction temperature, or allowed
change in temperature on chip junction is exceeded,
resulting in pulse frequency reduction and / or output
frequency reduction (depending on parameterization
in P0290).
r0037[0]: Heat sink temperature
r0037[1]:
Chip junction temperature (includes heat sink)
Check the following:
• Surrounding temperature must lie within speci-
fied limits
• Load conditions and load steps must be appro-
priate
• Fan must turn when converter is running
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