SIEMENS V20 VFD DRIVE FAULTS CODE LIST PART-1

In this article we are going to discuss about siemens v20 vfd drive fault Cause and Remedy for this fault codes ( F1, F2 , F3 , F4 , F5 , F6 , F11 , F12 , F20 , F35 )


 

SIEMENS V20 DRIVE


F1 - FAULT:  Overcurrent



CAUSE :
  • 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
  • r0949 = 22: Hardware reported

REMEDY :

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 - FAULT: Overvoltage

CAUSE :
  • Main supply voltage too high
  • Motor is in regenerative mode
  • r0949 = 0: Hardware reported
  • r0949 = 1 or 2: Software reported


REMEDY :

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 - FAULT: Undervoltage


CAUSE :
  • Main supply failed.
  • Shock load outside specified limits.
  • r0949 = 0: Hardware reported
  • r0949 = 1 or 2: Software reported

REMEDY :

Check supply voltage.


F4 - FAULT: Inverter over Temperature

CAUSE :
  • Inverter overloaded
  • Ventilation inadequate
  • Pulse frequency too high
  • Surrounding temperature too high
  • Fan inoperative

REMEDY :

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
  • Surrounding temperature too high?
  • Fan must turn when inverter is running


F5 - FAULT: Inverter I2t

CAUSE :
  • Inverter overloaded.
  • Load cycle too demanding.
  • Motor power (P0307) exceeds inverter
  • power capability (r0206).


REMEDY :

Check the following:
  • Load cycle must lie within specified limits.
  • Motor power (P0307) must match inverter power (r0206)
Note :
  • F5 cannot be cleared until the inverter overload utilization (r0036) is lower than the inverter I2t warning (P0294).


F6 - FAULT: Chip Temperature Rise Exceeds Critical Levels


CAUSE :
  • Load at start-up is too high
  • Load step is too high
  • Ramp-up rate is too fast

REMEDY :

Check the following:
  • Load or load step too high?
  • Increase ramp-up time (P1120).
  • Motor power (P0307) must match inverter power (r0206).
  • Use setting P0290 = 0 or 2 for preventing F6.


F11 - FAULT: Motor over Temperature

CAUSE :
  • Motor overloaded
  • This fault may occur if small motors (≤ 250 W, 4- or 2-pole) are used and run at a frequency below 15 Hz, even though the motor temperature is within limits.


REMEDY :

Check the following:
  • Load or load step too high?
  • Motor nominal over temperatures (P0626 - P0628) must be correct
  • Motor temperature warning level (P0604) must Match
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.


F12 - FAULT: Inverter Temperature Signal Lost


CAUSE :
  • Wire breakage of inverter temperature (heat sink) sensor.


F20 - FAULT: DC Ripple Too High




CAUSE :
  • The calculated DC ripple level has exceeded the safe threshold. 
  • This is commonly caused by loss of one of the mains input phases.


REMEDY :

  • Check the mains supply wiring.


F35 - FAULT: Maximum number of auto restart attempts exceeded


CAUSE :
  • Auto restart attempts exceed value of P1211.

 

F3 Falut



F60 Falut


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