Siemens SINAMICS V20 Inverter, Operating Instructions Manual

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Faults and alarms
9.1 Faults
SINAMICS V20 Converter
Operating Instructions, 10/2019, A5E34559884-012
335
Fault Cause Remedy
F2
Overvoltage
•
Main supply voltage too high
• Motor is in regenerative mode
r0949 = 0: Hardware reported
r0949 = 1 or 2: Software reported
Check the following:
•
Supply voltage (P0210) must lie within limits indicated on
rating plate.
• Ramp-down time (P1121) must match inertia of load.
•
Required braking power must lie within specified limits.
•
Vdc controller must be enabled (P1240) and parameterized properly.
Note:
Regenerative mode can be caused by fast ramp downs or if the
motor is driven by an active load.
Higher inertia requires longer ramp times; otherwise, apply brak-
ing resistor.
F3
Undervoltage
• Main supply failed.
•
Shock load outside specified
limits.
r0949 = 0: Hardware reported
r0949 = 1 or 2: Software reported
Check supply voltage.
F4
Converter over-
temperature
•
Converter overloaded
• Ventilation inadequate
•
Pulse frequency too high
• Surrounding temperature too
high
•
Fan inoperative
Check the following:
•
Load or load cycle too high?
• Motor power (P0307) must match converter power (r0206)
•
Pulse frequency must be set to default value
• Surrounding temperature too high?
•
Fan must turn when converter is running
F5
Converter I
2
t
•
Converter overloaded.
• Load cycle too demanding.
•
Motor power (P0307) exceeds
converter power capability
(r0206).
Check the following:
•
Load cycle must lie within specified limits.
• Motor power (P0307) must match converter power (r0206)
Note: F5 cannot be cleared until the converter overload utilization
(r0036) is lower than the converter I
2
t warning (P0294).
F6
Chip temperature
rise exceeds
critical levels
• Load at start-up is too high
•
Load step is too high
• Ramp-up rate is too fast
Check the following:
• Load or load step too high?
•
Increase ramp-up time (P1120).
• Motor power (P0307) must match converter power (r0206).
•
Use setting P0290 = 0 or 2 for preventing F6.
F11
Motor over-
temperature
•
Motor overloaded
Check the following:
•
Load or load step too high?
•
Motor nominal overtemperatures (P0626 - P0628) must be correct
•
Motor temperature warning level (P0604) must match
• This fault may occur if small
motors are used and run at a
frequency below 15 Hz, even
though the motor temperature
is within limits.
Check the following:
• Motor current is not in excess of the motor nominal current as
indicated by the motor rating plate
•
Physical temperature of the motor lies within limits
If these two conditions are satisfied, then set parameter P0335 = 1.