The solution of Schneider inverter fault code

PHF: ⒈ Frequency converter power supply is not correct or fuse is blown; B. There is momentary defect in some phase. ⒈ Check the power supply connection and fuse; B. Reposition.

USF: ⒈ Supply voltage undervoltage; ⒉ Instantaneous voltage drop; 3. The load resistance is damaged. 1 Check the power supply voltage. 2 Replace the load resistance.

OSF, OHF, OLF, ObF, OPF, LFF, OCF: power supply voltage is too high check the power supply voltage radiator temperature is too high monitor the motor load; Inverter ventilation; Reset after the frequency converter is cooled; Thermal maintenance trip due to excessive overload time. 1 Check the hot maintenance Settings. Monitor the motor load 2 Wait about 7 minutes before restarting the braking too fast or the load is too heavy to extend the deceleration time, if necessary, add the brake resistance output phase check

4 -- 20 mA signal loss of motor connection AI2 port: check the given circuit 1. Too short a slope; 2. Excessive inertia or heavy load; 3. Mechanical slot. 1. View the Settings. 2. Check the motor/frequency converter/load capacity; 3. Check the mechanical condition.

SCF CF: The output side of the converter is short-circuited or grounded. Check the bridge resistance of connecting cable and motor insulation converter. 1. Load relay operation fault; 2. If the load resistance is damaged, check the connector and load resistance in the converter.

SLF O F S F EEF InF: Frequency converter ports are incorrectly connected. Check the connection of the converter interface, motor overheating (PTC sensor), motor ventilation and ambient temperature, check the type of sensor used, detect the fault of connecting the motor load sensor to the converter, check the fault of connecting the sensor to the converter EEPROM storage, block the power supply of the converter and reset it. 1. Internal faults; 2. Interface faults Check the interface of the frequency converter.

EPF SPF AnF: external chain fault. Check the faulty equipment and reset, no speed response, check the speed sensor connection and mechanical coupling. 1. Not following slopes; 2. Reverse the speed to the set point. 1. Check the speed response Settings and wiring; 2. Check whether the Settings for a specific load are appropriate. 3. Check the capacity of motor -- frequency converter, and whether brake resistance is needed.

SOF: 1. unstable; 2. The load is heavy. 1. View Settings and parameters. 2. Add brake resistance; 3. Check the capacity of motor/frequency converter/load.

CnF: Communication fault in the field bus. 1. Check the network connection of the converter; 2. Check the communication faults between the timeout ILF option board and the control board. Check the connection between the option board and the control board.

CFF: The fault that may be caused after replacing the board. 1. Nominal change of power plate; 2. Change the palette type, or install the palette when there is no palette but macro -- the equipment is CUS; 3. Remove the option panel; 4. Can't save inconsistent equipment. 1. Check the hardware equipment of the converter (power or other); 2. Cut off the inverter power supply and reset it; 3. Store the equipment in a file in the display module; 4. Press ENT twice to restore factory Settings (** Press ENT twice, the following information will be displayed: Fact.Set? Restore ENT/ESC to factory defaults? ENT/ESC)

CFI: Inconsistent equipment being fed into frequency converter through serial port. 1. Check the equipment that has been sent; 2. Send an identical device.