Lenze 8400 - Page 659

Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23 659
9 Diagnostics & error management
9.9 Error messages of the operating system
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
oU: DC bus overvoltage [xx.0123.00014]
LU: DC bus undervoltage [xx.0123.00015]
oC1: Power section - short circuit [xx.0123.00016]
Response (Lenze setting printed in bold)
 0: No Reaction  1: Fault  2: Trouble  3: TroubleQuickStop  4: WarningLocked  5: Warning  6: Information
Cause Remedy
The device has detected an overvoltage in the DC bus. To
protect the device hardware, the inverter control is
switched off.
• Depending on the configuration of the auto-start lock
function, set C00142
so that, when this error is
tripped, the inverter only restarts after the controller
inhibit has been switched.
• If this error message remains active longer than the
time set in C00601
, a "Fault" is tripped. Otherwise, the
deactivation of the error message causes the inverter
control to be enabled again
• In case of the control types VFCplus and SLVC, the
motor voltage is approached to the voltage
setpoint alongside a ramp.
• From version 15.00.00, this voltage ramp can be set
in C00983/2
. If the described remedies are not
possible or do not have any effect, it may be
required to increase this voltage ramp as otherwise
an overcurrent interruption may be caused. This
only happens in case of high motor power and
mass inertia so that the Lenze setting of 1 s should
be sufficient in the majority of cases.
• Reduce load in generator mode.
• Use a brake resistor.
• Use a regenerative power supply unit.
• Establish a DC-bus connection.
• Select a braking method in C00175
which stops the
ramp function generator when reaching the brake
chopper threshold ("HlgStop").
• In case of servo control (SC), set the speed controller
parameters correctly.
Response (Lenze setting printed in bold) Setting: C00600/1 ( Adjustable response)
 0: No Reaction  1: Fault  2: Trouble  3: TroubleQuickStop  4: WarningLocked  5: Warning  6: Information
Cause Remedy
The device has detected a DC bus undervoltage. The
inverter control is switched off because the drive
properties of the motor control cannot be provided
anymore due to the DC bus undervoltage.
• Depending on the configuration of the auto-start lock
function, set C00142
so that, when this error is
tripped, the inverter only restarts after the controller
inhibit has been switched.
• Switch on mains supply or ensure sufficient supply via
DC bus.
• Adjust setting in C00142
if required.
Response (Lenze setting printed in bold)
 0: No Reaction  1: Fault  2: Trouble  3: TroubleQuickStop  4: WarningLocked  5: Warning  6: Information
Cause Remedy
The device has recognised a short circuit of the motor
phases. To protect the device electronics, the inverter
control is switched off.
• Mostly, incorrectly executed motor connections are
the cause.
• If the device is inappropriately dimensioned with
regard to the motor load and the current limitation in
the controller (Imax controller) is set incorrectly, this
error message may also occur.
Motor control: Defining current limits
• Check motor connections and the corresponding plug
connector on the device.
• Only use permissible combinations of device power
and motor power.
• Do not set the dynamics of the current limitation
controller too high.