Installation manual

Diagnostics and Troubleshooting
S1A28692 03/2010 293
Fault detection codes that can be cleared with the automatic restart function after the cause has
disappeared
These detected faults can also be cleared by turning on and off or by means of a logic input or control bit
([Fault reset] (rSF) parameter page 232).
Detected Fault Name Probable cause Remedy
bLF
[Brake control]
• Brake release current not reached.
• Brake engage frequency threshold
[Brake engage freq] (bEn) only
regulated when brake logic control is
assigned.
• Check the drive/motor connection.
• Check the motor windings.
• Check the [Brake release I FW] (Ibr) and
[Brake release I Rev] (Ird) settings page 179
.
• Apply the recommended settings for
[Brake engage freq] (bEn).
CnF
[Com. network]
• Communication interruption on
communication card.
• Check the environment (electromagnetic compatibility).
• Check the wiring.
• Check the time-out.
• Replace the option card.
• Contact Schneider Electric Product Support.
COF
[CANopen com.]
• Communication interruption on the
CANopen® bus.
• Check the communication bus.
• Check the time-out.
• Refer to the CANopen® User's manual.
EPF1
[External flt-LI/Bit]
• Event triggered by an external
device, depending on user.
• Check the device which caused the trip and reset.
EPF2
[External fault com.]
• Event triggered by a communication
network.
• Check for the cause of the trip and reset.
FbES
[FB stop flt.]
• Function blocks have been stopped
while motor was running.
• Check [FB Stop mode] (FbSM) configuration.
FCF2
[Out. contact. open.]
• The output contactor remains open
although the closing conditions have
been met.
• Check the contactor and its wiring.
• Check the feedback circuit.
LCF
[input contactor]
• The drive is not turned on even
though [Mains V. time out ] (LCt)
has elapsed.
• Check the contactor and its wiring.
• Check the time-out.
• Check the line/contactor/drive connection.
LFF3
[AI3 4-20mA loss]
• Loss of the 4-20 mA reference on
analog input AI3.
• Check the connection on the analog inputs.
ObF
[Overbraking]
• Braking too sudden or driving load.
• Line voltage too high.
• Increase the deceleration time.
• Install a braking resistor if necessary.
• Activate the [Dec ramp adapt.] (brA) function page 157, if
it is compatible with the application.
• Check the line voltage.
OHF
[Drive overheat]
• Drive temperature too high. • Check the motor load, the drive ventilation and the ambient
temperature. Wait for the drive to cool down before restarting.
OLC
[Proc. overload flt]
• Process overload. • Check and remove the cause of the overload.
• Check the parameters of the
[PROCESS OVERLOAD] (OLd-) function, page 253
.
OLF
[Motor overload]
• Triggered by excessive motor
current.
• Check the setting of the motor thermal protection, check the
motor load. Wait for the motor to cool down before restarting.
OPF1
[1 output phase loss]
• Loss of one phase at drive output. • Check the connections from the drive to the motor.
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: [phone]-Outside Local Area: [phone]-www.stevenengineering.com