Faults and alarms
9.1 Faults
SINAMICS V20 Converter
Operating Instructions, 10/2019, A5E34559884-012
335
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.
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-
Undervoltage
• Main supply failed.
• Shock load outside specified
limits.
r0949 = 0: Hardware reported
r0949 = 1 or 2: Software reported
Check supply voltage.
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
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)
F5 cannot be cleared until the converter overload utilization
(r0036) is lower than the converter I
2
t warning (P0294).
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.
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.
To Next Page
Loading...
