Lenze SCM Drive

Lenze SCM Drive Fault Codes:

Fault Code and Meaning	Cause and Remedy
AF High Temp. Fault	Cause: Ambient temperature is too high; Cooling fan has failed (if equipped). Remedy: Check ventilation and ambient temperature. Check cooling fan operation.
CF Control Fault	Cause: A blank EPM, or an EPM with corrupted data has been installed. Remedy: Perform a factory reset using Parameter 48 – PROGRAM SELECTION.
cF Incompatibility Fault	Cause: An EPM with an incompatible parameter version has been installed. Remedy: Remove the EPM. Or perform a factory reset (Parameter 48) to change the parameter version of the EPM to match the drive.
dF Dynamic Braking Fault	Cause: The drive has sensed that the dynamic braking resistors are overheating and shuts down to protect the resistors. Remedy: Check load and braking cycle requirements.
EF External Fault	Cause: One of the TB-13 terminals is set as an External Fault input and that terminal is open with respect to TB-11. Remedy: Refer to Parameters 10, 11 and 12. Check external wiring/interlocks.
GF Data Fault	Cause: User data and OEM defaults in the EPM are corrupted. Remedy: Attempt factory reset. Replace EPM if necessary.
HF High DC Bus Voltage Fault	Cause: Line voltage is too high; Deceleration rate is too fast; Over-hauling load. Remedy: Check input line voltage. Decrease deceleration rate. Dynamic braking may be required for fast deceleration or overhauling loads.
JF Remote Keypad Fault	Cause: The communication link between the drive and the optional Remote Keypad has been lost. Remedy: Check for proper wiring and/or noise.
LF Low DC Bus Voltage Fault	Cause: Line voltage is too low. Remedy: Check input line voltage. Wait for voltage to return to normal level (Fault cannot be cleared until voltage is normal).
OF Output Transistor Fault	Cause: Phase to phase or phase to ground short circuit on the output; Boost settings are too high; Acceleration rate is too fast; Failed output transistor. Remedy: Check motor and cabling for shorts. Adjust Boost settings. Reduce acceleration rate.
PF Current Overload Fault	Cause: VFD is undersized for the application; Mechanical problem with the driven equipment. Remedy: Verify drive sizing vs motor load. Check driven equipment for mechanical binding or issues.
UF Start Fault	Cause: Start command was present when the drive was powered up. Remedy: Must wait 2 seconds after power-up to apply Start command if START METHOD is set to NORMAL.
F1 EPM Fault	Cause: The EPM is missing or damaged. Remedy: Install valid EPM.
FC, F2-F9, Fo Internal Faults	Cause: The control board has sensed a problem. Remedy: Consult factory.
br DC Braking	Cause: The DC braking circuit is activated. Remedy: Status indication only.
cE Parameter Version Warning	Cause: An EPM with a different parameter version is installed and an attempt is made to change parameter settings without performing the TRANSLATE function. Remedy: Refer to PROGRAM SELECTION (Parameter 48).
CL Current Limit	Cause: The output current has exceeded the CURRENT LIMIT setting (Parameter 25) and the drive is reducing output frequency. Remedy: If drive remains in CURRENT LIMIT too long, it can trip into PF fault. Check load conditions.
Er Error	Cause: Invalid data has been entered or an invalid command was attempted. Remedy: Check data range and retry.
GE OEM Mode Warning	Cause: Attempt made to change OEM default settings when the drive is operating in the OEM mode. Remedy: Refer to Parameter 48.
GF OEM Data Corruption	Cause: If displayed when RESET OEM attempted: OEM defaults in EPM corrupted. If displayed upon power-up: OEM defaults and user settings in EPM corrupted. Remedy: Refer to Section 13.2 of manual.
LC Fault Lockout	Cause: The drive has failed three restart attempts. Remedy: Requires a manual reset.
SE Serial Active	Cause: The optional remote keypad is active as the user interface instead of the buttons on front of the drive. Remedy: Refer to Parameter 14 (CONTROL).
SP Start Pending	Cause: Blinks during the interval between restart attempts. Remedy: Wait for restart sequence.
(Blinking Decimals) Decel Override	Cause: Both upper decimal points blinking. Drive stopped decelerating to avoid tripping into HF fault due to regenerative energy. Remedy: Status indication; drive is protecting itself.
CP Control Pad	Cause: Speed is set using the up and down buttons on the front of the drive. Remedy: Normal Operation.
EI External Current	Cause: Speed is controlled by a 4-20 mA signal wired to TB-25 and TB-2. Remedy: Normal Operation.
EU External Voltage	Cause: Speed is controlled by a 0-10 VDC signal wired to TB-5 and TB-2. Remedy: Normal Operation.
JG Jog Mode	Cause: The drive is in Jog mode, and the speed is set by Preset Speed #2 (Parameter 32). Remedy: Normal Operation.
OP MOP (Motor Operated Pot)	Cause: Contacts wired to TB-13B and TB-13E are used to increase and decrease the drive speed. Remedy: Normal Operation.
Pr1 – Pr7 Preset Speeds	Cause: Speed is set by the indicated Preset Speed (Parameters 31-37). Remedy: Normal Operation.