Fanuc power failure: After the control power supply of the power module is turned on, the power supply is turned on and the display "PIL" does not light up.
Cause analysis: 1. No AC power supply is provided. 2. Power supply circuit failure. (STATUS shows using a +5V power supply)
Exclusion method: 1. Check whether the AC200V on the R and S ends of plug CX1 is available and whether the connection is secure. 2. Power supply testing and fault analysis and maintenance.
Fanuc power failure: After the control power supply of the power module is turned on, the MCC is not connected.
Reason analysis: 1. The emergency stop has not been lifted. 2. The terminal plug is not well connected or the contact is poor. 3. The contactor used for MCC is poor or damaged. 4. The MCC contactor power cord is in poor contact or disconnected.
Troubleshooting method: 1. Emergency stop control circuit, test and check, find out the cause of the fault, and eliminate the fault. Release the E-STOP button. 2. Check whether the terminal plug K9 (JX1B) is connected to the JXB1 of SVM and SPM, and is firmly connected; Whether the connecting cable is broken, troubleshooting, replacing the broken wire. 3. Check the connection and replace the broken wire.
Fanuc power failure: After the power is turned on, the STATUS indicator light is lit on the power module, and the 7-segment display displays the alarm code.
Cause analysis: 1. Internal fault of power module.
Troubleshooting method: When there is a fault, the status display light and alarm display number should be observed, and then the fault analysis and maintenance should be carried out according to the status of the alarm number and indicator light.
Fanuc power alarm troubleshooting:
Fanuc power alarm fault: The alarm code "01" is displayed on the power module (the main circuit IPM of the power module is abnormal).
Cause analysis: 1. The IGBT or IPM of the high-power module in the power module is defective. 2. The machine tool has been used for a long time and the AC reactor is poor.
Exclusion method: 1. Replace the IGBT or IPM module. When replacing, it is necessary to find out the cause of the damage and whether the drive circuit is faulty, and replace it only after eliminating the fault, otherwise it may be damaged after replacement. 2. Replace the AC Fanuc reactor.
Fanuc power alarm fault: The alarm code "02" is displayed on the power module (the cooling fan of the control loop does not rotate).
Cause analysis: The cooling fan is faulty.
Exclusion method: Repair or replace the cooling Fanuc fan motor.
Fanuc power alarm fault: The alarm code "03" is displayed on the power module (the temperature rise of the radiator in the main circuit is abnormal).
Cause analysis: 1. Cooling fan failure. (Power module fan, electric cabinet ventilation fan) 2. The machine tool has been used for a long time, and the ventilation in the electric cabinet is not smooth. 3. Overload.
Elimination method: 1. Check the rotation of the cooling fan, and repair or replace the damaged cooling fan motor. 2. Regularly inspect and clean the cooling system to ensure smooth ventilation in the electric cabinet. 3. Check the rotation situation and troubleshoot.
Fanuc power alarm fault: The alarm code "04" is displayed on the power module (the DC voltage of the main circuit is too low).
Cause analysis: 1. There is a momentary power failure in the input power supply of the power module. 2. The input power supply voltage of the power module is too low. 3. Operation error. (When the power supply to the main circuit is cut off when the emergency stop state is lifted)
Exclusion method: Check the order of operations and operate them correctly.
Fanuc power alarm failure: the alarm code "05" is displayed on the power module (the main circuit charging cannot be carried out within the specified time)
Cause analysis: 1. DC short circuit. 2. The machine tool has been used for a long time, and the resistance in the power module to limit the charging current is poor.
Troubleshooting method: 1. Test and check, find out the fault point, replace the damaged components or wires, and eliminate the fault. 2. Replace and distribute the Nauc circuit board or Fanuc resistor.
Fanuc power alarm fault: The alarm code "06" is displayed on the power module (the input power supply is abnormal).
Cause analysis: The input power supply of the power module is out of phase.
Troubleshooting method: test and check the power control schematic diagram, find out the cause of the fault, replace the damaged components or wires, and troubleshoot.
Fanuc power alarm fault: The alarm code "07" is displayed on the power module (the DC voltage of the main circuit is abnormally increased).
Cause analysis: 1. The impedance of the AC power supply becomes high. 2. The regeneration circuit is abnormal. 3. IGBT (or IPM) failure.
Exclusion method: 1. Check the impedance of the power supply. 2. Check and confirm whether there is overvoltage in the terminal IR and IS. 3. Replace the IGBT or IPM module. When replacing, it is necessary to find out the cause of the damage and whether the drive circuit is faulty, and replace it only after eliminating the fault, otherwise it may be damaged after replacement.
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