The most common errors and possible solutions
Schneider Altivar inverters are devices that provide precise drive control in everyday industrial applications. Despite their reliability, they can signal problems through error codes, which require proper interpretation. Below, we've summarized the most common errors, their potential causes, and tips on how to resolve them.
Contents:
- OCF error code
- InF error code
- OHF error code
- SCF error code
- CFF error code
- OSF error code
- OLF error code
- ObF error code
- USF error code
- PHF error code
- SLF1 error code
- SLF2 error code
- BrF error code
- EEF error code
- COF error code
- tnF error code
- CPF error code
- LFF error code
- APF error code
- HLF error code
OCF error - device overcurrent
OCF - possible cause of Schneider Altivar inverter error
The inverter has detected excessive current flow, which may be due to a short motor acceleration time, too high moment of inertia, or a mechanical blockage.
OCF - Schneider Altivar inverter error fix
It is worth analyzing the acceleration ramp settings, checking the correctness of the engine data and the condition of the mechanical system.
If the problem persists, contact a professional service: inverter repair .
InF Error - Internal Device Error
InF - possible cause of the Schneider Altivar inverter error
An internal component of the inverter may malfunction due to electromagnetic interference or component damage.
InF - Schneider Altivar inverter error repair
It is advisable to check the installation location and, if necessary, test the inverter in a different operating environment.
If the problem persists, contact a professional service: inverter repair .
OHF error - inverter overheating
OHF - possible cause of Schneider Altivar inverter error
Increased operating temperatures may result from overload, limited ventilation or faulty cooling components.
OHF - Schneider Altivar inverter error repair
It is necessary to check the airflow, verify the load and wait until the temperature returns to an acceptable level.
If the problem persists, contact a professional service: inverter repair .
SCF error - short circuit in the motor circuit
SCF - possible cause of the Schneider Altivar inverter error
Most often, it indicates a phase-to-phase short circuit or deterioration of the insulation of the wires or motor windings.
SCF - Schneider Altivar inverter error repair
It is recommended to carry out insulation measurements and verify the condition of cables and terminals.
If the problem persists, contact a professional service: inverter repair .
CFF Error - Invalid Configuration
CFF - possible cause of the Schneider Altivar inverter error
The inverter has detected a conflict in the settings or missing required configuration data.
CFF - Schneider Altivar inverter error repair
You can restore factory settings or upload the correct configuration based on the documentation.
If the problem persists, contact a professional service: inverter repair .
OSF error - supply voltage too high
OSF - possible cause of the Schneider Altivar inverter error
The permissible input voltage of the inverter is exceeded, e.g. as a result of a voltage surge in the mains.
OSF - Schneider Altivar inverter error repair
It is required to control the voltage level and its stability in the power supply system.
If the problem persists, contact a professional service: inverter repair .
OLF error - motor overload
OLF - possible cause of the Schneider Altivar inverter error
Excessive load on the drive or incorrectly set thermal protection will activate this alarm.
OLF - Schneider Altivar inverter error repair
The protection parameters should be corrected and the motor should be checked to see if it is mechanically overloaded.
If the problem persists, contact a professional service: inverter repair .
ObF error - voltage too high during braking
ObF - possible cause of the Schneider Altivar inverter error
Excessive voltage in the intermediate circuit during braking, usually caused by heavy engine stopping.
ObF - Schneider Altivar inverter error repair
It is recommended to extend the braking ramp and use a braking resistor if the application allows it.
If the problem persists, contact a professional service: inverter repair .
USF error - supply voltage too low
USF - possible cause of the Schneider Altivar inverter error
The input voltage drops below the minimum value required for inverter operation.
USF - Schneider Altivar inverter error repair
It is worth measuring the voltage at the power supply point and verifying its stability.
If the problem persists, contact a professional service: inverter repair .
PHF Error - Incorrect Three Phase Power Supply
PHF - possible cause of the Schneider Altivar inverter error
The inverter has detected a phase failure in the three-phase supply or an uneven load between phases.
PHF - Schneider Altivar inverter error repair
Check the completeness of the power supply, correct connection and condition of the fuses.
If the problem persists, contact a professional service: inverter repair .
Error SLF1 - Modbus communication error
SLF1 - possible cause of the Schneider Altivar inverter error
The inverter has lost communication signal with the master system via Modbus.
SLF1 - Schneider Altivar inverter error repair
It is advisable to check the connections and the correct configuration of times and device addresses.
If the problem persists, contact a professional service: inverter repair .
Error SLF2 - Network communication error (e.g. CANopen)
SLF2 - possible cause of the Schneider Altivar inverter error
Network bus interference, cable problems, or incorrect configuration parameters.
SLF2 - Schneider Altivar inverter error repair
Checking cables, correct network settings and filtering interference in the environment.
If the problem persists, contact a professional service: inverter repair .
BrF Error - Dynamic Braking Error
BrF - possible cause of the Schneider Altivar inverter error
The inverter is not detecting correct braking system operation. This may be due to a damaged resistor or incorrect connection.
BrF - Schneider Altivar inverter error repair
Check the braking system, including the condition of the resistor and wire connections.
If the problem persists, contact a professional service: inverter repair .
EEF Error - EEPROM Memory Fault
EEF - possible cause of the Schneider Altivar inverter error
The inverter cannot correctly read the configuration data from non-volatile memory.
EEF - Schneider Altivar inverter error repair
Perform a factory reset. If the problem persists, the device may need to be replaced.
If the problem persists, contact a professional service: inverter repair .
COF Error - Load Configuration Error
COF - possible cause of the Schneider Altivar inverter error
Overload resulting from incorrect settings of application parameters.
COF - Schneider Altivar inverter error repair
Correct the inverter settings according to the technical documentation and system operating profile.
If the problem persists, contact a professional service: inverter repair .
Error tnF - engine autotuning failed
tnF - possible cause of the Schneider Altivar inverter error
The inverter was unable to perform the motor identification routine - the motor data may be incorrect or the connection may be incomplete.
tnF - Schneider Altivar inverter error repair
Verify the engine parameters and check that all wires are connected correctly.
If the problem persists, contact a professional service: inverter repair .
CPF Error - Control Error
CPF - possible cause of the Schneider Altivar inverter error
Control signal interference or malfunction in control circuits.
CPF - Schneider Altivar inverter error repair
Reset the inverter and check the control circuits and auxiliary voltage levels.
If the problem persists, contact a professional service: inverter repair .
LFF error - no signal from encoder
LFF - possible cause of the Schneider Altivar inverter error
The inverter does not receive a signal from the position sensor – the cause may be a damaged cable or encoder.
LFF - Schneider Altivar inverter error repair
Check the connections and operation of the measurement system, verify the parameter settings.
If the problem persists, contact a professional service: inverter repair .
APF Error - Application Function Error
APF - possible cause of the Schneider Altivar inverter error
Error resulting from incorrect operation of programmed logic functions or incorrect task configuration.
APF - Schneider Altivar inverter error repair
Check the application function settings and adjust them to the actual process.
If the problem persists, contact a professional service: inverter repair .
HLF error - too much mechanical load
HLF - possible cause of the Schneider Altivar inverter error
Engine overloaded. This may be due to excessive load or a blocked system.
HLF - Schneider Altivar inverter error repair
Analysis of the mechanical system and the starting parameters of the inverter is recommended.
If the problem persists, contact a professional service: inverter repair .
