Message, Lu: undervoltage in the dc bus, Ou:dc-bus overvoltage – Lenze 8400 User Manual
Page 592: Lu: dc bus undervoltage, Xx.0123.00015, Xx.0123.00016, Xx.0123.00014, 9diagnostics & error management
9
Diagnostics & error management
9.10
Error messages of the operating system
592
Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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
so that, when this error is
tripped, the controller only restarts after the
controller inhibit has been switched.
• If this error message remains active longer than the
time set in
, a "Fault" is tripped.
• Reduce load in generator mode.
• Use a brake resistor.
• Use a regenerative power supply unit.
• Establish a DC-bus connection.
Response (Lenze setting printed in bold)
Setting:
( 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
so that, when this error is
tripped, the controller only restarts after the
controller inhibit has been switched.
• Switch on mains supply or ensure sufficient supply via
DC bus.
• Adjust setting in
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.