6.1 Fault alarm and countermeasures
The SK300 series VFD provides dozens of alarm information and protection functions. Once a fault occurs, the protection function will acts, stop output, fault relay R1 acts, fault code is displayed on the panel. When users encounter malfunctions ,we can first refer to Table 6-1 for self inspection, analyze the cause of the malfunction, and quickly find a solution. If the problem still cannot be solved, please contact the agent of the frequency converter or our company.
Attention: If a malfunction occurs and the motor is rotating, it will slowdown freely until it stop.
table 6-1 VFD self inspection
Fault code | Fault description | Fault reason | Solution measures |
|---|---|---|---|
-E.02- | Accelerated overcurrent | There is grounding or short circuit in the output circuit of the VFD | Eliminate peripheral faults and check if there is a short circuit in motor or contactor. |
Control method set FVC or SVC without parameter identification first | Set motor parameters according to the motor nameplate for motor parameter identification | ||
Under rapid acceleration mode, acceleration time set too short | Increase acceleration time | ||
Inappropriate setting for over current stall suppression | Confirm that the overcurrent stall suppression function is enabled; The current setting value for overcurrent stall action is too high, adjust it within 120% to 150%; The gain setting for overcurrent stall suppression is too small,adjust within 20-40 | ||
Manual torque increase or unsuitable V/F curve | Adjust manual torque increase or V/F curve | ||
Start again to a motor that have rotated already | Select speed tracking to start or wait for the motor to stop before starting again | ||
Affected by external interference | Check the historical fault records. If the current value did not reach the overcurrent point value at the time of the fault, it is necessary to search for the interference source. If there are no other interference sources, it may be a problem with the driver board or Hall device | ||
-E.03- | Deceleration overcurrent | There is grounding or short circuit in the output circuit of the VFD | Eliminate peripheral faults and check if there is a short circuit in motor or contactor. |
Control method set FVC or SVC without parameter identification first | Set motor parameters according to the motor nameplate for motor parameter identification | ||
Under rapid Deceleration mode, acceleration time set too short | Increase Deceleration time | ||
Inappropriate setting for over current stall suppression | Confirm that the overcurrent stall suppression function is enabled; The current setting value for overcurrent stall action is too high, adjust it within 120% to 150%; The gain setting for overcurrent stall suppression is too small,adjust within 20-40 | ||
No brake unit or brake resistor installed | Installing brake units and resistors | ||
Affected by external interference | Check the historical fault records. If the current value did not reach the overcurrent point value at the time of the fault, it is necessary to search for the interference source. If there are no other interference sources, it may be a problem with the driver board or Hall device | ||
-E.04- | Constant speed overcurrent | There is grounding or short circuit in the output circuit of the VFD | Eliminate peripheral faults and check if there is a short circuit in motor or contactor. |
Control method set FVC or SVC without parameter identification first | Set motor parameters according to the motor nameplate for motor parameter identification | ||
Under rapid Deceleration mode, acceleration time set too short | Increase Deceleration time | ||
Inappropriate setting for overcurrent stall suppression | Confirm that the overcurrent stall suppression function is enabled; The current setting value for overcurrent stall action is too high, adjust it within 120% to 150%; The gain setting for overcurrent stall suppression is too small,adjust within 20-40 | ||
The selection of VFD power mode is too small | Eliminate peripheral faults and check if there is a short circuit in motor or contactor | ||
Affected by external interference | Check the historical fault records. If the current value did not reach the overcurrent point value at the time of the fault, it is necessary to search for the interference source. If there are no other interference sources, it may be a problem with the driver board or Hall device | ||
-E.05- | Accelerated overvoltage | Input voltage is too high | Adjust the voltage to the normal range |
During the acceleration process, there is an external force that drives the motor to run | Cancel additional power or install brake resistors | ||
Inappropriate overvoltage suppression setting | Confirm that the overvoltage suppression function is enabled; The overvoltage suppression action voltage setting value is too large, adjust within 770V-700V; The overvoltage suppression gain setting is too small, adjust within 30-50 | ||
No brake unit or brake resistor installed | Installing brake units and resistors | ||
The acceleration time is too short | Increase acceleration time | ||
-E.06- | Deceleration overvoltage | During the deceleration process, there is an external force that drives the motor to run | Cancel additional power or install brake resistors |
Inappropriate overvoltage suppression setting | Confirm that the overvoltage suppression function is enabled; The overvoltage suppression action voltage setting value is too large, adjust within 770V-700V; The overvoltage suppression gain setting is too small, adjust within 30-50 | ||
The deceleration time is too short | Increase deceleration time | ||
No brake unit or brake resistor installed | Installing brake units and resistors | ||
-E.07- | Constant speed overvoltage | Inappropriate overvoltage suppression setting | Confirm that the overvoltage suppression function is enabled; The overvoltage suppression action voltage setting value is too large, it is recommended to adjust within 770V-700V; The overvoltage suppression gain setting is too small, adjust within 30-50; The maximum rise frequency setting for overvoltage suppression is too small, and adjust within 5-20Hz |
During the process, there is an external force that drives the motor to run | Cancel additional power or install brake resistors | ||
-E.08- | Buffer resistor overload | The main cables voltage fluctuates up and down at the undervoltage point | Seeking technical support |
-E.09- | Under voltage | Instant power off | Enable the function of Instant power off and keep running to prevent fault of under voltage |
The input voltage of the frequency converter is not within the specification requirements | Adjust the voltage to the normal range | ||
Abnormal main cable voltage | Seeking technical support | ||
Rectifier bridge Buffer resistor Power supply board Control board abnormality | Seeking technical support | ||
-E.10- | Inverter overload | load too large or motor blockage | Reduce the load and check the motor and mechanical condition |
frequency converters power is too small | Choice bigger VFD | ||
-E.11- | Motor overload | Check if motor protection parameters appropriate | Set this parameter correctly |
load too large or motor blockage | Reduce the load and check the motor and mechanical condition | ||
-E.12- | Input phase loss | Abnormal three-phase input power supply | Check and troubleshoot issues in peripheral circuits |
Power board lightning protection board main control board abnormal | Seeking technical support | ||
-E.13- | Output phase loss | Motor malfunction | Check if the motor is open circuit |
The cable from VFD to the motor is abnormal | Troubleshooting peripheral faults | ||
The three-phase output of VFD is unbalanced during motor running | Check if the three-phase winding of the motor is normal and troubleshoot | ||
Driver board IGBT abnormal | Seeking technical support | ||
-E.14- | Module overheating | Excessive ambient temperature | Reduce ambient temperature |
Air duct blockage | Cleaning the air duct | ||
Fan damage | Replace fan | ||
Damaged thermistor | Replace the thermistor | ||
-E.15- | External faults | Input external fault signals through multifunctional terminal D | Troubleshooting peripheral faults, confirming mechanical restart allowed, resetting operation |
Input external fault signals through virtual IO function | Confirm that the virtual IO group parameters are set correctly, reset and run | ||
-E.16- | Communication abnormal | The upper controller is not working properly | Check the wiring of upper controller |
communication cable incorrect | Check communicate cable | ||
Incorrect communication expansion card settings | Correctly set the communication expansion card type | ||
Incorrect communication parameter group settings | Set communication parameters correctly | ||
After the above tests, you can try to restore the factory settings | |||
-E.17- | Contactor abnormal | Abnormal power board and driver board | Replacing the power or driver board |
Abnormal contactor | Replace the contactor | ||
-E.18- | Abnormal current detection | Check for abnormalities in Hall devices | Replace new hall . |
Abnormal power or driver board | Replace new board | ||
-E.19- | Abnormal motor tuning | Motor parameters not set according to nameplate | Adjust as nameplate |
Parameter identification process timeout | Check the cable between VFD and motor | ||
Encoder abnormality | Check if the number of encoder lines is set correctly; Check if the signal cable connection of the encoder is correct and secure | ||
-E.20- | Encoder/PG abnormal | Encoder model mismatch | Set the encoder type correctly according to the actual situation |
Encoder connection error | Detecting PG card power supply and phase sequence | ||
Encoder damaged | Replacing the encoder | ||
PG card abnormality | Replace PG card | ||
-E.21- | Abnormal parameter reading and writing | EEPRROM chip damaged | Replace the main control board |
-E.22- | Inverter hardware abnormal | Over voltage present | Handle as over voltage fault |
Over current present | Handle according to over current fault | ||
-E.23- | Motor short circuit to ground | Motor short circuit to ground | Replacing cables or motors |
-E.24- | reserve | Seeking technical support | |
-E.25- | reserve | Reset operation | |
-E.26- | Operation time arrived | Total running time reaches the set value | Reset operation |
-E.27- | User defined fault 1 | Input user-defined fault 1 signal through multifunctional terminal DI | Reset operation |
Input user-defined fault 1 signal through virtual IO function | Reset operation | ||
-E.28- | User defined fault 2 | Input user-defined fault 2 signal through multifunctional segment DI | Replacing cables or motors |
Input user-defined fault 2 signal through virtual IO function | Seeking technical support | ||
-E.29- | Power on time has arrived | Total power on time reaches the set value | Seeking technical support |
-E.30- | Load drop | The operating current of the frequency converter is less than the load drop detection | Confirm whether the load is detached or whether the parameter settings comply with the actual operating conditions |
-E.31- | Lost PID feedback during runtime | PID feedback is smaller than the set value | Detect PID feedback signal or set it to an appropriate value |
-E.40- | Fast current limited timeout | load too large or motor blockage | Reduce the load and check the motor and mechanical condition |
The selection of frequency converters is too small | Choose a frequency converter with a higher power level | ||
-E.41- | Switching motors during operation | Change the current motor selection through terminals during the operation of the frequency converter | Perform motor switching operation after the frequency converter is shut down |
-E.42- | Excessive speed deviation | Encoder parameter settings incorrect | Correctly setting encoder parameters |
No parameter self identification | Perform self identification of motor parameters | ||
The speed deviation is too large, and the detection parameter settings are unreasonable | Reasonably set detection parameters based on actual situations | ||
-E.43- | Motor overspeed | Encoder parameter settings incorrect | Correctly setting encoder parameters |
No parameter self identification was performed | Perform self identification of motor parameters | ||
The speed deviation is too large, and the detection parameter settings are unreasonable | Reasonably set detection parameters based on actual situations | ||
-E.45- | Motor over temperature | Loose wiring of temperature sensor | Check the wiring of the temperature sensor and troubleshoot the issue |
Motor temperature too high | Improve the carrier wave or take other heat dissipation measures to dissipate heat from the motor | ||
-E.51- | Initial position error | Frequency converter output phase loss | Check motor wires and troubleshoot |
Frequency converter current detection fault or Hall damage | Check Hall and troubleshoot | ||
The motor inductance value is too high | Mask this fault through function code P11.17 | ||
-E.55- | Slave fault during master slave control | The slave has malfunctioned, check the slave | Troubleshooting according to slave fault codes |