Siemens Micromaster 420 Faults and Alarms A blog we posted earlier this week about the troubleshooting referenced the Faults and Alarms list for the Micromaster series, so we decided that it would make sense to make the list of Micromaster 420 Faults and Alarms directly available. This is from the corresponding manual for the Micromaster 420 series, but it is buried within the manual which most people most likely don’t even have. Hopefully, this helps with your troubleshooting. Check out our article touching on, along with other Siemens series coverage. View our in stock. For more information or to request a quote, please call 800-691-8511 or email. We also provide pre-priced.
MICROMASTER 420 fault messages In the event of a failure, the inverter switches off and a fault code appears on the display. NOTE To reset the fault code, one of three methods listed below can be used: 1. Cycle the power to the drive. Press the button on the BOP or AOP. Via Digital Input 3 (default setting) Fault Possible Causes Diagnose & Remedy Reaction F0001 Overcurrent. Motor power does not correspond to the inverter power. Motor lead short circuit.
Earth fault Check the following: 1. Motor power (P0307) must correspond to inverter power (P0206) 2. Cable length limits must not be exceeded 3. Motor cable and motor must have no short- circuits or earth faults 4. Motor parameters must match the motor in use 5. Value of stator resistance (P0350) must be correct 6. Motor must not be obstructed or overloaded.
Increase the ramp time. Reduce the boost level OFF2 F0002 Overvoltage. DC-link voltage (r0026) exceeds trip level (P2172).
Overvoltage can be caused either by too high main supply voltage or if motor is in regenerative mode. Regenerative mode can be cause by fast ramp downs or if the motor is driven from an active load Check the following: 1. Supply voltage (P0210) must lie within limits indicated on rating plate 2. DC-link voltage controller must be enabled (P1240) and parameterized properly 3. Ramp-down time (P1121) must match inertia of load OFF2 F0003 Undervoltage. Main supply failed.
Shock load outside specified limits Check the following: 1. Supply voltage (P0210) must lie within limits indicated on rating plate 2. Supply must not be susceptible to temporary failures or voltage reductions OFF2 F0004 Inverter Over- temperature.
Ambient temperature outside of limits,. Fan failure Check the following: 1. Fan must turn when inverter is running 2. Pulse frequency must be set to default value 3. Air inlet and outlet points are not obstructed Ambient temperature could be higher than specified for the inverter OFF2 F0005 Inverter I2t. Inverter overloaded.
Duty cycle too demanding. Motor power (P0307) exceeds inverter power capability (P0206) Check the following: 1. Load duty cycle must lie within specified limits 2. Motor power (P0307) must match inverter power (P0206) OFF2 F0011 Motor Over- temperature I2t. Motor overloaded.
Motor data incorrect. Long time period operating at low speeds 1. Check motor data 2. Check loading on motor 3. Boost settings too high (P1310,P1311, P1312) 4. Check parameter for motor thermal time constant 5.
Check parameter for motor I2t warning level OFF1 F0041 Stator resistance measurement failure Stator resistance measurement failure 1. Check if the motor is connected to the inverter 2. Check that the motor data has been entered correctly OFF2 F0051 Parameter EEPROM Fault Reading or writing of the non-volatile parameter storage has failed 1. Factory reset and new parameterization 2. Change inverter OFF2 F0052 Powerstack Fault Reading of the powerstack information has failed or the data is invalid Change inverter OFF2 F0060 Asic Timeout Internal communications failure 1. Acknowledge fault 2. Change inverter if repeated OFF2 F0070 Communicatio ns board setpoint error No setpoint received from communications board during telegram off time 1.
Check connections to the communications board 2. Check the master OFF2 F0071 No Data for USS (RS232 link) during Telegramm Off Time No response during telegram off time via USS (BOP link) 1. Check connections to the communications board 2. Check the master OFF2 F0072 No Data from USS (RS485 link) during Telegram Off Time No response during telegram off time via USS (COM link) 1.
Check connections to the communications board 2. Check the master OFF2 F0080 Analogue input – lost input signal. Broken wire. Signal out of limits Check connection to analogue input OFF2 F0085 External Fault External fault is triggered via terminal inputs Disable terminal input for fault trigger OFF2 F0101 Stack Overflow Software error or processor failure 1. Run self test routines 2. Change inverter OFF2 F0221 PI Feedback below mini- mum value PID Feedback below minimum value P2268 1.
Change value of P2268 2. Adjust feedback gain OFF2 F0222 PI Feedback above maximum value PID Feedback above maximum value P2267 1. Change value of P2267 2. Adjust feedback gain OFF2 F0450 (Service mode only) BIST Tests Failure Fault value 1 Some of the power section tests have failed 2 Some of the control board tests have failed 4 Some of the functional tests have failed 8 Some of the IO module tests have failed 16 The Internal RAM has failed its check on power-up 1. Inverter may run but certain actions will not function correctly 2. Replace inverter OFF2 MICROMASTER 420 alarm messages Fault Possible Causes Diagnose & Remedy Reaction A0501 Current Limit. Motor power does not correspond to the inverter power.
Motor leads are too short. Earth faults 1. Check whether the motor power corresponds to the inverter power 2. Check that the cable length limits have not been exceeded 3. Check motor cable and motor for short- circuits and earth faults 4. Check whether the motor parameters correspond with the motor being used 5.
Check the stator resistance 6. Increase the ramp-up-time 7. Reduce the boost 8. Check whether the motor is obstructed or overloaded — A0502 Overvoltage limit.
Siemens Sinamics Fault Codes
Mains supply too high. Load regenerative.
Ramp-down time too short 1. Check that mains supply voltage is within allowable range 2. Increase ramp down times Note: Vdc-max controller is active, ramp-down times will be automatically increased — A0503 Undervoltage Limit. Mains supply too low. Short mains interruption Check main supply voltage (P0210) — A0504 Inverter Over- temperature Warning level of inverter heat-sink temperature (P0614) is exceeded, resulting in pulse frequency reduction and/or output frequency reduction (depending on parametrization in (P0610) 1. Check if ambient temperature is within specified limits 2.
Check load conditions and duty cycle 3. Check if fan is turning when drive is running — A0505 Inverter I2t Warning level is exceeded; current will be reduced if parameterized (P0610 = 1) Check if duty cycle is within specified limits — A0506 Inverter Duty Cycle Heatsink temperature and thermal junction model are outside of allowable range Check if duty cycle are within specified limits — A0511 Motor Over- temperature I2t Motor overloaded Check the following: 1.
Siemens Vfd User Manual
P0611 (motor i2t time constant) should be set to appropriate value 2. P0614 (Motor i2t overload warning level) should be set to suitable level 3. Are long periods of operation at low speed occuring 4.