To Next PageTo Next PageWhy does my Lenze AC Tech Controller show a Current Overload Fault?
A Current Overload Fault in your Lenze AC Tech Controller indicates that the VFD is undersized for the application or there is a mechanical problem with the driven equipment.
What causes an Output Transistor Fault in Lenze AC Tech SF450 Controller?
An Output Transistor Fault in your Lenze AC Tech Controller can be triggered by a phase-to-phase or phase-to-ground short circuit on the output, a failed output transistor, boost settings that are too high, or an acceleration rate that is too fast.
What causes a Low DC Bus Voltage Fault in Lenze AC Tech Controller?
A Low DC Bus Voltage Fault in your Lenze AC Tech Controller is caused by line voltage that is too low.
What to do if Lenze AC Tech Controller displays a Control Fault?
If your Lenze AC Tech Controller displays a Control Fault, it may be due to a blank EPM or an EPM with corrupted data. Perform a factory reset using Parameter 48 - PROGRAM SELECTION.
How to resolve Incompatibility Fault on Lenze AC Tech SF450 Controller?
An Incompatibility Fault on your Lenze AC Tech Controller indicates that an EPM with an incompatible parameter version has been installed. You can either exchange the EPM or perform a factory reset (Parameter 48) to change the parameter version of the EPM to match the parameter version of the drive.
What does Single-phase Fault mean on Lenze AC Tech Controller?
A Single-phase Fault on your Lenze AC Tech Controller means that single-phase input power has been applied to a three-phase drive.
Why does my Lenze AC Tech SF450 show a Start Fault?
A Start Fault on your Lenze AC Tech Controller occurs when a start command was present when the drive was powered up. You must wait 2 seconds after power-up to apply the Start command if START METHOD is set to NORMAL.
What does External Fault mean on Lenze AC Tech SF450?
An External Fault occurs on your Lenze AC Tech Controller when TB-13A and/or TB-13C is set as an External Fault input and TB-13A and/or TB-13C is open with respect to TB-2. Refer to Parameter 10 or 12.
What causes a Data Fault in Lenze AC Tech Controller?
A Data Fault in your Lenze AC Tech Controller indicates that user data and OEM defaults in the EPM are corrupted.
What does Serial Fault mean on Lenze AC Tech SF450 Controller?
A Serial Fault indicates that the watchdog timer has timed out, meaning the serial link has been lost on your Lenze AC Tech Controller.
General| Series | SF450 |
|---|---|
| Output Voltage | 0-Input Voltage |
| Output Frequency | 0-400 Hz |
| Input Frequency | 50/60 Hz |
| Control Method | Sensorless Vector Control |
| Protection Features | Overcurrent, Overvoltage, Undervoltage, Short Circuit |
| Communication Interface | Modbus RTU |
| Operating Temperature | -10°C to +50°C |
| Humidity | 5-95% (non-condensing) |
| Enclosure Rating | IP20 |
Explains the layout of safety information, including signal words and icons.
Details the 24-month warranty for SCF Series AC motor controls against defects.
General safety precautions regarding electrical hazards and handling of the drive.
SCF drives are for inclusion in equipment; avoid adverse environmental conditions.
Procedure to reform DC bus capacitors after long storage to prevent damage.
Warns that capacitors retain charge after power removal and advises waiting before servicing.
Warns about DC current and specifies RCD Type B for protection.
Warns of electrical hazards and advises checking ratings and codes for wiring.
Details wiring connections for single-phase and three-phase input models.
Warns against connecting AC power to output terminals to prevent severe damage.
Warns that STOP terminal/key does not stop drive in JOG mode; remove JOG command instead.
Warns of electrical shock and capacitor charge before servicing.
Warns against connecting AC to output terminals and advises on power cycling frequency.
Provides steps to verify correct motor rotation after initial power up.
Describes how to enter the program mode and access parameters via the keypad.
Warns against removing the EPM while power is applied to avoid drive damage.
Calibrates the drive for applied input voltage (HIGH/LOW).
Sets the output IGBT switching rate, affecting motor noise and derating.
Details various start methods like Normal, Start on Power Up, and Flying Restart.
Warns that automatic starting can cause damage or injury; use only for inaccessible equipment.
Explains how to clear faults and the auto-restart behavior after faults.
