Fault and warning codes
SINAMICS V20 Inverter
234 Operating Instructions, 07/2012, A5E03728167
Fault code list
Fault Cause Remedy
F1
Overcurrent
• Motor power (P0307) does not
correspond to the inverter power
(r0206).
• Motor lead short circuit
• Earth faults
r0949 = 0: Hardware reported
r0949 = 1: Software reported
Check the following:
• Motor power (P0307) must correspond to
inverter power (r0206).
• Cable length limits must not be exceeded.
• Motor cable and motor must have no short-
circuits or earth faults.
• Motor parameters must match the motor in use.
• Value of stator resistance (P0350) must be
correct.
• Motor must not be obstructed or overloaded.
• Increase ramp-up time (P1120)
• Reduce starting boost level (P1312)
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 braking 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
Inverter overtemperature
• Inverter overloaded
• Ventilation inadequate
• Pulse frequency too high
• Ambient temperature too high
• Fan inoperative
Check the following:
• Load or load cycle too high?
• Motor power (P0307) must match inverter power
(r0206)
• Pulse frequency must be set to default value
• Ambient temperature too high?
• Fan must turn when inverter is running
F5
Inverter I
2
t
• Inverter overloaded.
• Load cycle too demanding.
• Motor power (P0307) exceeds
inverter power capability (r0206).
Check the following:
• Load cycle must lie within specified limits.
• Motor power (P0307) must match inverter power
(r0206)
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